EP3241951B1 - Set with slab and drop section - Google Patents

Description

The invention relates to an assembly according to the preamble of claim 1 comprising a slab and a chute section for liquids with multiple inlets, substantially in so-called "two-phase" applications and in particular in water pipes such as sanitary chutes in building.

A chute is a vertical outlet that serves one or more floors of the dwelling. In the upper part, the chute usually opens onto the roof, which allows the pipe to be ventilated and facilitates the flow of effluents. In the lower part, it ends with a fairly marked sloping section which leads either to a collective sanitation network (mains drainage) or to an individual sanitation network.

In so-called single falls, the various household or sanitary appliances are connected, and the noise of emptying household appliances or wastewater tends to be reflected by the walls of downspouts. Other constraints are linked to the appearance of water plugs or overpressure, which can lead to deactivation of the siphon, with the bad odors which result from it, or to annoying gurgling noises.

In high-rise buildings, these constraints are even more important, the height and the hydraulic flows being increased, by the multiplication of the number of floors also resulting in a higher number of sanitary appliances and a more important and frequent flow, and the height which can lead to greater risks of depression or overpressure.

High-rise buildings also have greater space constraints for the pipes.

A solution was found by proposing an aerator connection, which eliminates the need for a secondary pipe for aeration. The deflection fitting or panty has a connection part opening into the main chute, and a baffle or main chute deflection, diverting the main flow of the chute, at the connection part. The connection part and the baffle meet in the main chute, downstream of the connection. The baffle part is curved in shape. Such an example of an aerator connection is offered for example by the company Akatherm under the Akavent ™ brand.

In order to improve hydraulic performance, the document EP 2 447 424 also proposes an aerator connection in which the geometry of the baffle part is modified. Thus, the document EP 2 447 424 provides a branch line piece, comprising an upper drop pipe section, a deflection section connecting to the upper drop pipe section, and a lower drop pipe section connecting to the diversion section having a outlet opening, as well as at least one supply section in the area of the deflection section. The deflection section includes a first deflection domain, deflecting the wastewater with respect to the falling direction and a second deflection domain disposed downstream viewed in the falling direction with respect to the first deflection domain. The second deflection domain is inclined at an angle in the range of 2 to 12 °, relative to the direction of fall, and makes an angle in the range of 30 ° to 50 ° to the direction of the diverted wastewater by the first deviation domain (8). Thus, the baffle section forms a part of a spiral at the level of the deflection, the spiral starting upstream of the connection part and emerging downstream of the connection part in the main chute, thus creating a hydraulic speed component favoring a vortex flow to improve the flow downstream of the fitting. Such a geometry is not easily reproducible, in particular for assembling the chute during assembly, and also presents an undesirable bulk.

It is an object of the present invention to improve the falling flow characteristics.

Another objective of the present invention is to obtain a compact hydraulic chute.

To this end, the invention provides an assembly according to claim 1, comprising a slab and a drop section for liquid flow. or fluids, in particular water in a falling flow direction, comprising an upstream tubular drop member, a downstream tubular drop member, a deflection section between the upstream tubular drop member and the upstream drop tubular member downstream chute, a fitting with a flow fitting member opening into the downstream chute tubular member, the upstream chute tubular member, downstream chute tubular member, and flow connector member being substantially aligned in the direction of fall flow. The deflection section comprises a first deflection part in the extension of the upstream tubular drop element and being inclined with respect to the upstream tubular drop element, a second deflection part in the extension of the first deflection part ( and substantially parallel to the direction of the fall flow, and a third deflection part downstream of the second deflection part and opening into the downstream tubular fall element. The fall section is positioned on either side of the slab, the slab comprising a first through hole for the passage of the second offset part and a second through hole for the passage of the flow connection element opening into the downstream tubular element, the first through hole and the second through-hole are oriented in the direction of flow, which is vertical when the chute is in the operative position.

As a result, the invention relates above all to so-called two-phase applications. In these applications, a fluid or liquid must pass through the drop member without creating liquid plugs. To do this, it is advantageous to provide a complementary circulation of the other phase. In a wastewater fall application for example, it is therefore possible to initiate or maintain an air column. This results in an improvement and an option of adapting the water flow to achieve an optimization of the management of the two-phase air-water mixture in the deflection making it possible to ensure air circulation between upstream and downstream. 'downstream of said drop section. In fact, it has surprisingly been found that maintaining an air column is possible during deflection by providing only helical threads on one or more of the cylindrical parts. Of course, an optimization will take into account the adequate lengths of these presences of helical threads while respecting the angles of deviation or deviation without increasing the size of the system since there is no need for any intervention on the geometry. external, even if of course such an adaptation remains possible in addition or option.

In one aspect, the upstream chute tubular member, downstream chute tubular member, and flow connector member and deflection section are substantially aligned in a plane parallel to the chute flow direction. In a particular embodiment, the upstream tubular drop element and the downstream tubular drop element will be placed in register with respect to each other.

According to the invention, the deflection section comprises a first deflection part in the extension of the upstream tubular drop element and inclined relative to the upstream tubular drop member, a second deflection part in the extension of the first deflection part is substantially parallel to the direction of fall flow, and a third deflection part downstream of the second deflection part and opening into the downstream tubular fall element. The elements constituting the whole of the chute section can be largely standardized elements for such applications. The primary adaptation being helical threads on the internal surface with preferentially an inclination of the turns of about 15 ° to 30 ° and preferably with sufficient lengths to create or maintain an air column - lengths which will be adapted on a case-by-case basis. because of the velocities and volumes of flow as well as the diameters invoked.

According to one aspect, the second deflection part comprises an internal surface provided with second helical threads, in particular the second deflection part being cylindrical.

In one aspect, the flow connector member has an inner surface provided with third helical threads.

In one aspect, the third offset portion forms an angle with the connector member within the range of 20 to 40 °, in particular 30 °.

In one aspect, the first deflection portion forms an angle with the upstream tubular drop member comprised in the range of 30 to 60 °, in particular 45 °.

In one aspect, the first offset portion forms an angle with the third offset portion greater than 90 °, in particular with respective different angles with respect to the tubular members resulting in an asymmetric offset. In particular, the first deflection part forms a first angle with the upstream tubular drop member and the third deflection part forms a second angle different from the first angle with the downstream tubular drop member, resulting in an asymmetric deflection.

It can therefore be observed that the flow of the liquid or of the fluid undergoes a setting in rotation by the turns of the helical threads and an offset only in the presence of obtuse angles so that the optimization of the two-phase mixture is so to guarantee the existence of an air column regardless of the flow that may be created only very occasionally.

In one aspect, the flow connector member has an inner surface provided with third helical threads.

In one aspect, at least two of the first helical threads, the second helical threads and the third helical threads have the same thread pitch and / or the same thread orientation. In doing so, the continuity of the optimization is possible and, at the same time, it is conceivable to adapt the pitch and the orientation to adapt to the deviations. As an alternative, it is also possible to envisage variable pitches or orientations, for example a pitch progressively tighter or spaced apart to provide for a greater or lesser rotation of the fluid or liquid and / or to provide for a more or less slowing down. significant flow in general or occasionally in well localized places.

In one aspect, at least two of the first helical threads, the second helical threads, and the third helical threads have the same inter-thread spacing.

According to one aspect, at least a part of the helical threads has an inclination with respect to a direction of the tubular element provided with said helical threads of approximately 20 °, in particular forming an angle of less than 30 ° with the angles present in the offset from the vertical.

In one aspect, the fitting is an aerator fitting with a pressure balancing fitting member opening into the deflection section. It should be noted that usually such a connection element is formed by an air intake valve and that in any case such an element remains purely optional, knowing that the air column persists in the offset and, therefore, under no circumstances should overpressure be generated.

According to another aspect of the invention, there is proposed a chute comprising an assembly according to the invention or according to a preferred embodiment as defined in the present application.

• La figure 1 illustre une section de chute ;
• La figure 2 illustre une section de chute ;
• La figure 3 illustre une section de chute ;
• La figure 4 illustre une section de chute ;
• La figure 5 illustre une chute ;
• La figure 6 illustre un ensemble selon l'invention ;
• La figure 6a illustre un ensemble selon un autre mode de réalisation ;
• La figure 7 illustre un ensemble selon l'invention ;
• La figure 7a illustre un ensemble selon un autre mode de réalisation ;
• La figure 8 illustre un ensemble selon l'invention ;
• La figure 8a illustre un ensemble selon un autre mode de réalisation.

Other characteristics and advantages of the present invention will emerge from the description given below with reference to the appended drawings which illustrate an exemplary embodiment thereof without any limiting nature, among which:

• The figure 1 illustrates a drop section;
• The figure 2 illustrates a drop section;
• The figure 3 illustrates a drop section;
• The figure 4 illustrates a drop section;
• The figure 5 illustrates a fall;
• The figure 6 illustrates an assembly according to the invention;
• The figure 6a illustrates an assembly according to another embodiment;
• The figure 7 illustrates an assembly according to the invention;
• The figure 7a illustrates an assembly according to another embodiment;
• The figure 8 illustrates an assembly according to the invention;
• The figure 8a illustrates an assembly according to another embodiment.

In the drawings, the same or similar elements are indicated with the same or similar reference numerals. On the figures 1 to 4 , the fall sections are shown in partially exploded view, side view and isometric view respectively with partial setbacks.

The figure 1 illustrates a chute section 1 according to the present invention. The drop section 1 is shown for the flow of effluents in a fall flow direction. The fall flow direction is substantially vertical for a fall, such as implemented on a job site.

The drop section 1 comprises an upstream tubular drop member 10, a downstream tubular drop member 15, a deflection section 20 between the upstream tubular drop member and the downstream drop tube member, and a connector 30 for the chute. fitting or secondary discharge connection on the drop section.

The fitting 30 is of the aerator fitting type, with an aeration and / or pressure balancer fitting element 34 and a flow fitting element 38. The flow fitting element 38 opens into the tubular element of downstream chute 15, for connecting secondary effluents in the main chute. The pressure balancing connector element opens into the deflection section 20, to equalize the pressure in the deflection section 20 and the flow connector element 38.

The upstream tubular drop member 10, the downstream tubular drop member 15 are substantially aligned in the direction of drop flow. On the other hand, the upstream tubular drop member 10, the downstream tubular drop member 15 and the deflection section 20 lie substantially in the same plane, which parallel to the drop flow direction.

The deflection section 20 forms a baffle to divert the flow arriving from the chute at the level of the connector 30. The deflection section comprises a first deflection part 22 in the extension of the upstream tubular drop member 10 and inclined with respect to the upstream tubular fall element 10, a second deflection part 24 in the extension of the first deflection part 22 and substantially parallel to the direction of the fall flow, and a third deflection part 26 downstream of the second part offset 24 and opening into the downstream tubular drop element 15.

On the figure 1 , the third deflection portion 26 forms an angle with the flow connection member 38 within the range of 20 to 40 °, in particular 30 °.

In the figure 1 , the upstream tubular chute element 10 comprises an internal surface 60 of the upstream chute provided with first helical threads 61.

The first helical threads 61 serve to set the effluents in rotation, which presses them against the internal surface 60, and allows the formation of an air column in the center of the pipe.

The first helical threads thus break the water piston which tends to form. In other words, the first helical threads 61 serve to initiate a vortex for the effluent for passage into the deflection section, i.e. the internal surface of the upstream tubular member 10 ensures good flow. at the level of the branching area of secondary effluents to be connected to the main pipe via connection 30, for example at each level of a building

In addition, the first helical threads slow down the flow of water upstream of the bypass, and thus contribute to the hydraulic characteristics of the system. This makes it possible to promote the fluidic and hydraulic behavior, by leaving the path of free fall of the effluents. Hydraulically, a vortex is therefore created with an internal air column which also remains present inside the deflection since the decelerations induced by these are initiated or accompanied by the deceleration and the introduction of a spiral speed component. helical threads. This results in an improvement and an option of adapting the water flow to achieve an optimization of the management of the two-phase air-water mixture in the deflection making it possible to ensure air circulation between upstream and downstream. 'downstream of said drop section.

The figure 2 represents a drop section 201 which differs essentially from the figure 1 by the presence of helical deflection threads in the deflection section. Identical elements between figure 1 and the figure 2 have the same part number and are not described again.

The deflection section 220 comprises a first deflection part 222 in the extension of the upstream tubular drop member 10 and inclined relative to the upstream tubular drop member 10, a second deflection part 224 in the extension of the first offset portion 222 and substantially parallel to the direction of flow of chute, and a third deflection part 226 downstream of the second deflection part 224 and opening into the downstream tubular drop element 15.

According to figure 2 , the second deflection portion 224 has an internal surface provided with second helical deflection threads 261.

So in the figure 2 , the upstream tubular drop member 10 and the second deflection portion 224 each have an internal surface with helical threads.

Thus, unlike the systems of the prior art, in which the effluents are set in rotation by means of a deflection section of the spiral type, rotating around the longitudinal axis of the chute section, the present invention proposes to use a fall section in which the vortex effect is created by the internal surfaces of the elements. By providing second helical threads 261 in the deflection section 20, in addition to the first helical threads 61, continuity of the vortex thus formed is ensured, which improves the flow and the hydraulic and acoustic performance.

Preferably, the first helical threads 61 and the second helical threads 261 have the same thread pitch and the same thread orientation, and / or the same spacing between threads, to ensure the continuity of the vortex.

Preferably, the threads are continuous.

The figure 3 represents a drop section 301 which differs essentially from the figures 1 and 2 by the presence of helical deflection threads in the connecting element. Identical elements between figure 1 and the figure 3 have the same part number and are not described again.

To the figure 3 , the drop section 301 comprises a fitting 300, of the aerator fitting type, with a pressure-balancing fitting element 334 opening into the deflection section 320 and a flow fitting element 338 opening into the element tubular drop downstream. In the figure 3 , the secondary effluent flow connector 338 comprises an internal surface provided with third helical threads 361.

The figure 4 represents a combination of figures 1 to 3 , i.e. a chute section 401 in which the upstream chute member 10 has first helical threads 61 on its inner surface, the deflection section 220 has second helical threads 261 on its inner surface, and the flow connector 338 also has third helical threads 361 on its inner surface.

Preferably, at least two of the first helical threads 61, the second helical threads 261 and the third helical threads 361 have the same thread pitch and the same thread orientation, and / or the same spacing between threads.

Preferably, the threads are continuous.

Fourth helical threads may also be provided on the inner surface of the downstream chute tubular member.

The upstream and downstream chute elements and the deflection section are preferably obtained by extrusion or injection of thermoplastic material, of the rigid PVC monolayer type. A mineral charge can be added for the acoustics of the chute section.

The fall elements may otherwise comprise a rigid outer sleeve and an acoustic sleeve, in contact with the effluents conveyed by the pipe. The rigid outer sleeve is made of rigid PVC, lightened or not, and the acoustic sleeve can be made of loaded plasticized PVC. It is also possible to provide anti-fire additives for the rigid outer sleeve and / or the acoustic sleeve. The addition of biocides preventing the degradation of plasticizers is also possible.

The figure 5 illustrates a sanitary unit drop 90 which starts from the upper floor of a building to cross all the floors then the ground floor to emerge into the collector provided in the basement.

The chute includes drop sections according to the figures 1 to 4 , connected in series.

The household appliances are connected to the chute, via the connectors 30, for the flow of secondary effluents via the flow connector element 38.

Thus, thanks to the combination of a connection optionally with an aerator, in which helical threads can be provided, with helical threads upstream of the connection, the problems of depression and de-siphoning which could result are limited. resulting in gurgling and noise pollution, while maintaining a compact system requiring only one perforation in the panel.

The figures 6 and 7 illustrate a chute section 601 according to the present invention.

Fall section 601 is shown for the flow of effluent in a fall flow direction. The fall flow direction is substantially vertical for a fall, such as implemented on a job site.

The chute section 601 comprises an upstream tubular chute member 610, a downstream chute tubular member 615, an offset section 620 between the upstream chute tubular member and the downstream chute tubular member, and a connector 630 for the chute. fitting or secondary discharge connection on the drop section.

The upstream fall tubular member 610, the downstream fall tubular member 615 are substantially aligned in the fall flow direction. On the other hand, the upstream fall tubular member 610, the downstream fall tubular member 615 and the deflection section 620 lie substantially in one plane, which is parallel to the fall flow direction.

The deflection section 620 forms a baffle to divert the flow arriving from the chute at the level of the connector 630. The deflection section 620 comprises a first deflection part 622 in the extension of the upstream tubular drop element 610 and inclined relative to it. to the upstream tubular fall element 610, a second deflection part 624 in the extension of the first deflection part 622 and substantially parallel to the direction of the fall flow, and a third deflection part 626 downstream of the second offset portion 624 and opening into the downstream tubular drop element 615.

Fitting 630 is of the aerator fitting type, with a vent and / or pressure balancing fitting element 634 and a flow fitting element 638. The flow fitting element 638 opens into the tubular element of downstream chute 615, for the connection of secondary effluents in the main chute. The pressure balancing fitting member opens into the bypass section 620, to balance the pressure in the deflection section 620 and the flow fitting member 638.

A connector pant 660 is provided for the connection of the various household elements. On the figures 6 and 7 , the connector socket 660 is intended to connect a toilet drain 681, a sink drain 682 and a shower or bath drain 683. This is given by way of illustration, not limiting. The connection element 638, in particular the connection panty 660, are orientable, in particular by rotation around the direction of the fall flow, to facilitate the connection of the various household elements, as can be seen on the pictures. figures 6 and7.

Furthermore, the drop section 601 is positioned on either side of a slab 690. More precisely, the slab 690 comprises a first through hole 691, for the passage of the second offset part 624, and a second hole 692, for the passage of the flow connection element 638 opening into the downstream tube member 615. The first through hole 691 and the second through hole 692 are oriented in the direction of flow, which is vertical when the chute is in a functional position.

On the figures 6 and 7 , the connector 660 is positioned above the slab 690, and can be used for the connection of sanitary appliances whose height allows it. However, some sanitary ware have a limited height, such as the so-called Italian showers. When the height is limited, it is sometimes difficult to respect the necessary slope recommended to allow the good flow of fluids until the fall. In this case, the connecting pants can be positioned under the slab, as illustrated in the figure 8 .

To the figure 8 , a drop section 701 is illustrated. The drop section 701 differs from the drop section 601 primarily by the fitting 730.

The chute section 701 comprises an upstream tubular drop member 710, a downstream tubular drop member 715, a deflection section 720 between the upstream drop tube member and the downstream drop tube member, and a connector 730 for the chute. fitting or secondary discharge connection on the drop section.

The deflection section 720 forms a baffle to divert the flow arriving from the chute at the level of the connector 730. The deflection section 720 comprises a first deflection portion 722 in the extension of the upstream tubular drop element 710 and inclined relative to it. to the upstream tubular fall element 710, a second deflection part 724 in the extension of the first deflection part 722 and substantially parallel to the direction of the fall flow, and a third deflection part 726 downstream of the second offset part 724 and opening into the downstream tubular drop element 715.

Fitting 730 is of the aerator fitting type, with a vent and / or pressure balancing fitting element 734 and a flow fitting element 738. The flow fitting element 738 opens into the tubular element of downstream chute 715, for the connection of secondary effluents in the main chute. The pressure balancing connector element opens into the deflection section 720, to balance the pressure in the deflection section 720 and the flow connector element 738.

Furthermore, the drop section 701 is positioned on either side of a slab 790. More specifically, the slab 790 comprises a first through hole 791, for the passage of the second offset part 724, and a second hole through 792, for the passage of the flow connection element 738 opening into the downstream tubular drop element 715. The first through hole 791 and the second through hole 792 are oriented in the direction of flow, which is vertical when the chute is in a functional position.

In this example, a connecting pant 760 is provided for the connection of the various household elements, above the slab. An additional connector 770 is also provided, below the slab 790.

This is given by way of illustration, not limiting. Fitting 730 could have only one fitting 770, below the slab, or one fitting 760 above the slab.

The connector element 738, in particular the connector pant 760 and the additional connector pant 770, are orientable, in particular by rotation about the direction of the fall flow, to facilitate the connection of the various household elements.

It is also seen that the drop section 701 is longer than the drop section 601 of the figures 6 and 7 . The drop section 701 has a greater length of the second deflection section 724, to accommodate the additional connecting pants 770.

In order to optimize the performance of the leech, the leech section may include first, second, third and / or fourth helical threads, similar to the leech sections illustrated in the drawings. figures 1 to 4 .

The figures 6a, 7a and 8a represent drop sections which differ from the drop sections shown respectively on the figures 6, 7 and 8 , by the presence of helical threads.

Thus, the upstream tubular drop element 610, 710 comprises an internal upstream chute surface, which can be provided with first helical threads 664. The first helical threads serve to set the effluents in rotation, which presses them against the internal surface. , allowing the formation of an air column in the center of the pipe.

The second deflection portion 624, 724 has an internal surface which can be provided with second helical deflection threads 661, 761.

Likewise, the secondary effluent flow connector 638, 738 includes an internal surface which may be provided with third helical threads 663, 763.

Preferably, at least two of the first helical threads, the second helical threads and the third helical threads have the same thread pitch and the same thread orientation, and / or the same spacing between threads. Preferably, the threads are continuous.

Fourth helical threads 665 may also be provided on the inner surface of the downstream chute tubular member.

The figures 6a, 7a and 8a represent drop sections with first, second, third, fourth helical threads. This is given by way of non-limiting example only, and the number of helical threads may vary, such as the examples of figures 1 to 4 . For example, a drop section may be provided with only the second and third helical threads.

Thus, it can be seen that the arrangement of the drop section according to the present invention is modular and allows great flexibility with respect to the slab. The positioning of the panties can be done above and / or below the slab. Those skilled in the art understand that this makes it possible to comply with the recommended slopes allowing the flow of fluids to reach the drop section and the drop, and this regardless of the height of the appliance or of the sanitary element to be connected. In addition, the panty (s) can be oriented, which all the more facilitates the connection of the elements, regardless of their positioning in space relative to the drop section.

Claims (15)

1. An assembly comprising
   a slab (690, 790), and
   a fall pipe section (601; 701) for a flow of liquids or fluids, in particular of water in a fall flow direction, comprising an upstream fall pipe tubular member (610, 710), a downstream fall pipe tubular member (615, 715), a diverter section (620; 720) between the upstream fall pipe tubular member and the downstream fall pipe tubular member, a connection (630, 730) with a flow fitting member (638; 738) opening into the downstream fall pipe tubular member,
   the diverter section (620; 720) comprising a first diverter portion (622; 722) in the extension of the upstream fall pipe tubular member (610; 710) and being inclined with respect to the upstream fall pipe tubular member, a second diverter portion (624; 724) in the extension of the first diverter portion (622; 722) and substantially parallel to the fall flow direction, and a third diverter portion (626; 726) upstream of the second diverter portion (624; 724) and opening into the downstream fall pipe tubular member (615, 715),
   the upstream fall pipe tubular member (610), the downstream fall pipe tubular member (615) and the flow fitting member (638) being substantially aligned in the fall flow direction,
   characterized in that the fall section (601, 701) is positioned on either side of the slab (690, 790), the slab (690) comprising a first through hole (691, 791) for the passage of the second diverter portion (624, 724) and a second through hole (692, 792) for the passage of the flow fitting member (638, 738) opening into the downstream fall pipe tubular member (615, 715), the first through-hole (691, 791) and the second through-hole (692, 792) are oriented in the flow direction, which is vertical when the fall is in operating position.
2. The assembly according to claim 1, wherein the fitting member is a fitting wye (660) for connecting sanitary appliances or elements, wherein the fitting wye can be positioned above or below the slab (690), in order to respect the recommended slopes allowing the flow of fluids depending on the sanitary appliances or elements to be connected.
3. The assembly according to claim 2, in which a second fitting wye (770) is provided below the slab (790).
4. The assembly according to claim 2 or 3, in which the fitting wye (760) and/or the additional fitting wye (770) can be oriented, by rotation about the fall flow direction.
5. The assembly according to any one of the preceding claims, wherein
   at least one of the upstream fall pipe tubular member (10), the downstream fall pipe tubular member (15), and the diverter section (20; 220, 320), in particular a tubular member thereof, comprises an inner surface provided with first helical threads.
6. The assembly according to any one of the preceding claims, wherein the upstream fall pipe tubular member (10), the downstream fall pipe tubular member (15), the flow fitting member (38; 238, 338) and the diverter section (20; 200, 300), in particular the tubular member thereof, are substantially aligned in a plane parallel to the fall flow direction.
7. The assembly according to claim 5, wherein the second diverter portion (224) comprises an inner surface provided with second helical threads (261), in particular the second diverter portion (224) being cylindrical.
8. The assembly according to claim 7, wherein the flow fitting member (338) has an inner surface provided with third helical threads (361).
9. The assembly according to the preceding claim, wherein at least two of the first helical threads (61), the second helical threads (261) and the third helical threads (361) have the same thread pitch, thread orientation, and/or thread spacing.
10. The assembly according to claim 8 or 9, wherein at least a part of the first helical threads (61), second helical threads (261) and third helical threads (361) has an inclination with respect to a direction of the tubular member having said helical threads (61, 261, 361) of about 20°, in particular forming an angle of less than 30° with the angles present in the diverter with respect to the vertical.
11. The assembly according to any one of the preceding claims, wherein the third diverter portion (26; 226, 326) forms an angle with the flow fitting member (38) in the range of 20° to 40°, in particular 30°.
12. The assembly according to any one of claims 1 to 11, wherein the first diverter portion (22; 222, 322) forms an angle with the upstream fall pipe tubular member (10) in the range of 30 to 60°, in particular 45°.
13. The assembly according to any one of claims 1 to 12, wherein the first diverter portion (22; 222, 322) forms an angle with the third diverter portion (26; 226, 326) greater than 90°, in particular the first diverter portion (22; 222, 322) forms a first angle with the upstream fall pipe tubular member and the third diverter portion (26; 226, 326) forms a second angle different from the first angle with the downstream fall pipe tubular member, resulting in an asymmetrical diversion.
14. The assembly according to any of the preceding claims, wherein the fitting is an aerator fitting (30; 330) with a pressure-balancing fitting member (34; 334) opening into the diverter section.
15. A fall pipe (90) comprising an assembly according to any one of the preceding claims.

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