CA1093391A - Plumbing test fitting - Google Patents
Plumbing test fittingInfo
- Publication number
- CA1093391A CA1093391A CA307,045A CA307045A CA1093391A CA 1093391 A CA1093391 A CA 1093391A CA 307045 A CA307045 A CA 307045A CA 1093391 A CA1093391 A CA 1093391A
- Authority
- CA
- Canada
- Prior art keywords
- closure plate
- gasket
- pipe sections
- valve element
- test fitting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Landscapes
- Sliding Valves (AREA)
Abstract
PLUMBING TEST FITTING
ABSTRACT OF THE DISCLOSURE
A plumbing test fitting for waste or vent pipes and stacks extending between adjacent floors of a building having a closure plate adapted to be slidably fitted between a pair of spaced adjacent ends of a pair of pipes, the joint being sealed by a detachable sealing clamp which also sealably bears against the periphery of the closure plate.
A sliding valve element having an operating stem which extends outwards between the pipes and through the sealing clamp can be operated to open or close a passage in the closure plate so as to enable the pipe to be closed for testing and thereafter opened to permit testing fluid to escape down the pipes.
ABSTRACT OF THE DISCLOSURE
A plumbing test fitting for waste or vent pipes and stacks extending between adjacent floors of a building having a closure plate adapted to be slidably fitted between a pair of spaced adjacent ends of a pair of pipes, the joint being sealed by a detachable sealing clamp which also sealably bears against the periphery of the closure plate.
A sliding valve element having an operating stem which extends outwards between the pipes and through the sealing clamp can be operated to open or close a passage in the closure plate so as to enable the pipe to be closed for testing and thereafter opened to permit testing fluid to escape down the pipes.
Description
-`~` 10~3391 ~
BACKGROUND OF THE INVENTION
Field of the Invention - -~
This invention relates to test fittingsfor pres~
sure testing on waste or vent pipes and stacks.
Prior Art . .
In the installation of plumbing systems, parti-cularly waste or vent pipes in buildings, it is necessary ;~
to pressure test the pipes for leaks. Prior art testing procedures have usually involved the incorporation of a short ~est section in the stack which is closed to the passage of fluid therethrough and which, after ~esting, ; must be removed and rèplaced with a comparable length of ;~
pipe, .
One of the ma~or problems of the prior art testing methods, particularly in multi-story buildings, resides in the disposal of the testing fluid above the test section and its replacement with a permanent stack section. It has usually been the practice to use an open `
fitting below the test section, into which the testing fluid from the stack above the test section can be dis-charged. However, in many instances, such fittings are not always easily available and disposal racilities, due ~ ;~
to one cause or another, have sometimes failed, leading to excessive water damage.
BACKGROUND OF THE INVENTION
Field of the Invention - -~
This invention relates to test fittingsfor pres~
sure testing on waste or vent pipes and stacks.
Prior Art . .
In the installation of plumbing systems, parti-cularly waste or vent pipes in buildings, it is necessary ;~
to pressure test the pipes for leaks. Prior art testing procedures have usually involved the incorporation of a short ~est section in the stack which is closed to the passage of fluid therethrough and which, after ~esting, ; must be removed and rèplaced with a comparable length of ;~
pipe, .
One of the ma~or problems of the prior art testing methods, particularly in multi-story buildings, resides in the disposal of the testing fluid above the test section and its replacement with a permanent stack section. It has usually been the practice to use an open `
fitting below the test section, into which the testing fluid from the stack above the test section can be dis-charged. However, in many instances, such fittings are not always easily available and disposal racilities, due ~ ;~
to one cause or another, have sometimes failed, leading to excessive water damage.
- 2 -~(~9339 In recent years a new method of pipe installation has bben developed utilizing a type of coupling for adjoin-ing cast iron pipe and pipe fittings which employs a compres-sible sealing gasket which can be wrapped about a pipe joint and compressed into fluid-tight sealing engagemenit with the pipe sections by a removable clamp. In this type of connec-tion~ the adjoining ends of the pipe sections to be coupled are spaced slightly apart to accept an annular sealing ridge on an inner face of the sealing gasket, It is with this type of cast iron pipe construction that the test fitting of the present invention is adapted to be used.
SUMMARY OF THE INVENTION
~5 The present invention provides a test fitting Which can be applied to a joint in a pair of adjoining pipe section9 ~o temporarily replace a removable coupling ~nd which) there~orej does not require the lnsertion of a new pip~ 8ection in i~9 place.
The test fitting of the present invention which, in its normal position, closes communication between joining pipe sections can, prior to its removal, be op-erated to an open position to enable a testing fluid to be discharged directly from the upper pipe section into the lower pipe section without the use of ex- -traneous tubing, etc., and therefore substantially re-duces, if not eliminates, danger of flooding.
SUMMARY OF THE INVENTION
~5 The present invention provides a test fitting Which can be applied to a joint in a pair of adjoining pipe section9 ~o temporarily replace a removable coupling ~nd which) there~orej does not require the lnsertion of a new pip~ 8ection in i~9 place.
The test fitting of the present invention which, in its normal position, closes communication between joining pipe sections can, prior to its removal, be op-erated to an open position to enable a testing fluid to be discharged directly from the upper pipe section into the lower pipe section without the use of ex- -traneous tubing, etc., and therefore substantially re-duces, if not eliminates, danger of flooding.
- 3 - -0~3391 The test fitting of the present invention has a closure plate adapted to be slidably fitted between spaced ends of a pair of adjoining pipe sections having a fluid passage which is normally closed by a movable valve element ~ounted thereon, a.compressible sealing gas-ket adapted to be wrapped circumferentially around the ad-joining end portions of the two pipe sections, a flexible clamp adapted to be positioned over the gasket for com-pressing the gasket into fluid-tight sealing engagement with the stack sections and the closure plate, the gasket ..
and the clamp having aligned openings, and an operating handle connécted to the valve element and slidably ex- .
tending through the openings of the gasket and clamp for : operating the valve element from its closed ~o its open position.
A detailed description following, related to the drawings, gives e~empli~ication o apparatuQ according to ~`
the invention which, however, is capable of expre8sion in .
means other than those particularly described and illus-trated.
DESCRIPTION OF THE DRAWINGS
Fig, 1 is an elevation of a portion of a waste stack showing the test fitting of the invention in~
stalled thereon, :.
Fig. 2 is a vertical sectional view, much enlarged, of
and the clamp having aligned openings, and an operating handle connécted to the valve element and slidably ex- .
tending through the openings of the gasket and clamp for : operating the valve element from its closed ~o its open position.
A detailed description following, related to the drawings, gives e~empli~ication o apparatuQ according to ~`
the invention which, however, is capable of expre8sion in .
means other than those particularly described and illus-trated.
DESCRIPTION OF THE DRAWINGS
Fig, 1 is an elevation of a portion of a waste stack showing the test fitting of the invention in~
stalled thereon, :.
Fig. 2 is a vertical sectional view, much enlarged, of
- 4 -, ~0~33gl the test fitting applied to the stack, Fig. 3 is a view taken on Line 3-3 of Fig. 2, Fig. 4 is a much enlarged sectional view of a central portion of the test fitting showing relation-ship of a valve element relative to a passage in ;~
the closure plate, ` ~ ~
~.............. ................................................ ............ ......... :
Fig. 5 is a sectional view, much enlarged, showing an edge portion of the test fitting.
DETAILED DISCLOSURE
}S
Referring to the drawings, Fig. 1 shows a po~
tion of a waste pipe 10 extending between a pair of floor6 lL and 12, the seack having a branch 13 which is ioined to the stack 10 by a "T~' section 14 by couplings, Z0 severally 15, and havin~ a te~t fi~ting 20 in accordance with the invention installed between a pair of pipe sec~
tions 21 and 22 below the branch 13 and the "T" section 14.
The test fitting 20, as hereinafter described, is replacable after testing procedures are-completed, by a known type of coupling (not sho-~n) which can be ex-tended around the joint between the pipe sections 21 and 22 to effect a fluid seal. This type of coupling re~
quires that the pipe sections 21 and 22, as particularly :
shown in Figs. 2 and 5, be spaced slightly apart.
Referring particularly to Figs. 2, 3, 4 and 5, the test fitting 20 has a closure plate assembly 23 which has a thin disc-like closure plate 24 which is of com-posite construction, being formed of an upper plate 25 and a lower plate 26 which are suitably welded together to form a substantially unitary plate. The closure plate 24 has a common fluid passage 27 formed by openings 27.1 and 27.2 in the plates 25 or 26 (see particuarly Fig. 4) and adjo,ining faces of upper and lower plates 25 and ~6 are machined or ~olded to provide an internal valve chamber 28 (shown in Fig. 3 in broken outline) in which a gate valve element 29 slid~bLy mounted for movement between a closed position over the passage 27 and an open position clear of said m pass~ge. A w~y 32 also extends from the valve chamber and opens out of the edge of the plate to accommodate an oper~
ating handle 33 secured to the gate valve element by means o which the g~te valve element can be operated between clos~d and open po9i~ions.
., ' The upper plate 25 is also machined to provide a central socket 34 (see Fig. 4) within which an annular sealing element 36 is secured by suitable adhesive and which has an inner thickened lip portion 37 which makes sliding sealable contact with the valve element when the latter is in its closed position. Thickness of the clo~
sure plate assembly is such that the entire assembly can be slidably fitted between the stack sections 21 and 22 and its diameter is a little greater than the outside - 6 ~
,. . .
10 ~ ~ 3 diameter of the pipe sections so as to provide a peri-pheral extending marginal portion 38 when the assembly is centrally positioned between the pipe sections The test fitting also includes a compressible gasket 39 which, preferrably, is formed of a single strip of resilient sealing material such as rubber, the length of which is substantially equal to the circumference of the pipe sections 21 and 22 so as to permit the gasket to be wrapped completely about the joint between the sec-tions. The gasket also has a central groove 42 (see Fig.
the closure plate, ` ~ ~
~.............. ................................................ ............ ......... :
Fig. 5 is a sectional view, much enlarged, showing an edge portion of the test fitting.
DETAILED DISCLOSURE
}S
Referring to the drawings, Fig. 1 shows a po~
tion of a waste pipe 10 extending between a pair of floor6 lL and 12, the seack having a branch 13 which is ioined to the stack 10 by a "T~' section 14 by couplings, Z0 severally 15, and havin~ a te~t fi~ting 20 in accordance with the invention installed between a pair of pipe sec~
tions 21 and 22 below the branch 13 and the "T" section 14.
The test fitting 20, as hereinafter described, is replacable after testing procedures are-completed, by a known type of coupling (not sho-~n) which can be ex-tended around the joint between the pipe sections 21 and 22 to effect a fluid seal. This type of coupling re~
quires that the pipe sections 21 and 22, as particularly :
shown in Figs. 2 and 5, be spaced slightly apart.
Referring particularly to Figs. 2, 3, 4 and 5, the test fitting 20 has a closure plate assembly 23 which has a thin disc-like closure plate 24 which is of com-posite construction, being formed of an upper plate 25 and a lower plate 26 which are suitably welded together to form a substantially unitary plate. The closure plate 24 has a common fluid passage 27 formed by openings 27.1 and 27.2 in the plates 25 or 26 (see particuarly Fig. 4) and adjo,ining faces of upper and lower plates 25 and ~6 are machined or ~olded to provide an internal valve chamber 28 (shown in Fig. 3 in broken outline) in which a gate valve element 29 slid~bLy mounted for movement between a closed position over the passage 27 and an open position clear of said m pass~ge. A w~y 32 also extends from the valve chamber and opens out of the edge of the plate to accommodate an oper~
ating handle 33 secured to the gate valve element by means o which the g~te valve element can be operated between clos~d and open po9i~ions.
., ' The upper plate 25 is also machined to provide a central socket 34 (see Fig. 4) within which an annular sealing element 36 is secured by suitable adhesive and which has an inner thickened lip portion 37 which makes sliding sealable contact with the valve element when the latter is in its closed position. Thickness of the clo~
sure plate assembly is such that the entire assembly can be slidably fitted between the stack sections 21 and 22 and its diameter is a little greater than the outside - 6 ~
,. . .
10 ~ ~ 3 diameter of the pipe sections so as to provide a peri-pheral extending marginal portion 38 when the assembly is centrally positioned between the pipe sections The test fitting also includes a compressible gasket 39 which, preferrably, is formed of a single strip of resilient sealing material such as rubber, the length of which is substantially equal to the circumference of the pipe sections 21 and 22 so as to permit the gasket to be wrapped completely about the joint between the sec-tions. The gasket also has a central groove 42 (see Fig.
5) for accepting the extending peripheral portion of the closure plate.
The gasket is compressed into sealing engagement with the pipe 9ections 21 and 22 and the closure plate by mean8 o~ a detachable separable clàmp 43 which is formed of a ~exl~le metallic ribbon) ends 44 and 45 ~8ee Fig. 3) of Which over-l~p e~ch ~ther, one o ~he end8 44 being rev~r8ely looped to ~ccept a nut 46. The o~her end 45 is also looped to accept an annular ear 48 through which a screw 50 i9 extended to threadedly engage the nut. Both the gasket and the steel ribbon are provided with openings 51 and 52, respectively, through which the operating handle of the gate valve element slidably extends.
In the installation of a waste stack 10, the various pipe sections are interconnected by removable couplings as hereinbefore described. In conducting a pressure test, one of the lower most of the couplings is -- 1093391 ~ ~
removed and the test fitting inserted in its place. In order to install the test fitting, the screw and nut are disconnected and the gate valve element is moved to a closed position over the passage in the closure plate.
The plate is then fitted '~etween the pipe sections 21 and 22 and the gasket and clamp wrapped there-around and the screw fitted to the nut and the clamp then tightened against the gasket. Ends of the gasket are drawn into sealing engagement with each other and the gasket is also compressed into a fluid-tight sealing engagement with the ` --exte~ding marginal edge portion of the plate and the out-side walls of the pipe sections, The gasket is also com-~ressed into fluid-tight sealing engagement with the operating handle of the gate valve element. The stack and its branches above the installed test fitting are filled with water, all openings are sealed and the sealed st8ck ~s ~hen pressurlæed to a pressure no~ally required under ~nicipa~ code~ to ensu~e the plpe and the oouplings above ~he ~est ~itting are secure. When te9~ing ha8 b~n compLe~ed, the pressure $s relieved and the gate valve element moved to its open position by simply pulling the handle radially ou~ward to allow the water above the test fitting to pass downwards into the pipe section 22, The test fitting can then be removed and a conventional coupling installed in its place.
: :
The gasket is compressed into sealing engagement with the pipe 9ections 21 and 22 and the closure plate by mean8 o~ a detachable separable clàmp 43 which is formed of a ~exl~le metallic ribbon) ends 44 and 45 ~8ee Fig. 3) of Which over-l~p e~ch ~ther, one o ~he end8 44 being rev~r8ely looped to ~ccept a nut 46. The o~her end 45 is also looped to accept an annular ear 48 through which a screw 50 i9 extended to threadedly engage the nut. Both the gasket and the steel ribbon are provided with openings 51 and 52, respectively, through which the operating handle of the gate valve element slidably extends.
In the installation of a waste stack 10, the various pipe sections are interconnected by removable couplings as hereinbefore described. In conducting a pressure test, one of the lower most of the couplings is -- 1093391 ~ ~
removed and the test fitting inserted in its place. In order to install the test fitting, the screw and nut are disconnected and the gate valve element is moved to a closed position over the passage in the closure plate.
The plate is then fitted '~etween the pipe sections 21 and 22 and the gasket and clamp wrapped there-around and the screw fitted to the nut and the clamp then tightened against the gasket. Ends of the gasket are drawn into sealing engagement with each other and the gasket is also compressed into a fluid-tight sealing engagement with the ` --exte~ding marginal edge portion of the plate and the out-side walls of the pipe sections, The gasket is also com-~ressed into fluid-tight sealing engagement with the operating handle of the gate valve element. The stack and its branches above the installed test fitting are filled with water, all openings are sealed and the sealed st8ck ~s ~hen pressurlæed to a pressure no~ally required under ~nicipa~ code~ to ensu~e the plpe and the oouplings above ~he ~est ~itting are secure. When te9~ing ha8 b~n compLe~ed, the pressure $s relieved and the gate valve element moved to its open position by simply pulling the handle radially ou~ward to allow the water above the test fitting to pass downwards into the pipe section 22, The test fitting can then be removed and a conventional coupling installed in its place.
: :
Claims (5)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. Test fitting for installation between a pair of spaced apart sections of a waste pipes comprising:
(a) a closure plate adapted to be slidably fitted between the pipe sections, the plate having a passage for providing communication between the pipe sections, (b) a valve element mounted on the closure plate operable for closing or opening the passage to discharge of fluid therethrough, (c) a radially extending operating handle connected to the valve element for moving the latter between open and closed positions, (d) a compressible sealing gasket adapted to be ex-tended circumferentially about ajoining end por-tions of the pipe sections and the closure plate, (e) a separable clamp adapted to be extended circum-ferentially about the gasket for compressing the latter into sealing engagement with the end por-tions of the pipe sections and the closure plate, the gasket and the clamp having aligned openings for slidably receiving the operating handle for enabling the valve element to be moved from its closed to its open position when the test fitting is applied to the pipe sections.
(a) a closure plate adapted to be slidably fitted between the pipe sections, the plate having a passage for providing communication between the pipe sections, (b) a valve element mounted on the closure plate operable for closing or opening the passage to discharge of fluid therethrough, (c) a radially extending operating handle connected to the valve element for moving the latter between open and closed positions, (d) a compressible sealing gasket adapted to be ex-tended circumferentially about ajoining end por-tions of the pipe sections and the closure plate, (e) a separable clamp adapted to be extended circum-ferentially about the gasket for compressing the latter into sealing engagement with the end por-tions of the pipe sections and the closure plate, the gasket and the clamp having aligned openings for slidably receiving the operating handle for enabling the valve element to be moved from its closed to its open position when the test fitting is applied to the pipe sections.
2. A test fitting as claimed in Claim 1 in which the valve element is a sliding gate and the closure plate has an elongated guide chamber opening at one end into the passage of the closure plate for guiding the valve element between its open and closed positions.
3. A test fitting as claimed in Claims 1 or 2 in which the diameter of the closure plate is greater than the outside diameter of the pipe sections so as to have a marginal edge portion extending radially out-wards of the pipe sections and the gasket has a cen-tral groove for receiving said extending marginal edge portion of the closure plate.
4. A test fitting as claimed in Claim 1 in which the clamp is an elongated flexible metallic strap adapted to be wrapped about the gasket and means at opposite ends of the strip for tightening the latter into compressive engagement with the gasket.
5. A test fitting as claimed in Claim 2 including an annular sealing element secured to the closure plate at the passage, the sealing element having an annular depending lip extending into the passage for making slidable sealable contact with the valve element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA307,045A CA1093391A (en) | 1978-07-10 | 1978-07-10 | Plumbing test fitting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA307,045A CA1093391A (en) | 1978-07-10 | 1978-07-10 | Plumbing test fitting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1093391A true CA1093391A (en) | 1981-01-13 |
Family
ID=4111864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA307,045A Expired CA1093391A (en) | 1978-07-10 | 1978-07-10 | Plumbing test fitting |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1093391A (en) |
-
1978
- 1978-07-10 CA CA307,045A patent/CA1093391A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |