NZ330611A - cleaning drains using a foaming non-caustic composition containing reducing agent - Google Patents

Abstract

The method of substantially removing a restriction from a drain pipe system comprising: a) introducing to a drain pipe system having at least one of an organic restriction and an inorganic salt restriction a cleaning composition; b) activating the cleaning composition by adding a sufficient amount of liquid to the pipe system while maintaining a flow through state in the pipe system; c) allowing the drain opening active to remain in contact with the restriction for a sufficient time to substantially degrade the restriction and d) rinsing the drain opening active and restriction from the pipe system wherein the restriction removing method improves the water flow rate of the pipe system by an average of at least 0.7 litres/mins after 16 hours of drain opening active contacting the restriction is claimed. The cleaning composition comprising a foaming gas generation/entrapment carrier and a non caustic drain opening active comprising at least one reducing agent in an amount of 1 to 90% by weight of the cleaning composition.