Wastop Stainless Steel
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Wastop Stainless Steel

The patented Wastop® inline check valve has been the innovator and industry leader since its inception in 2002.

Wastop excels at preventing backflow, flooding, and sewage odor spread in pipe networks. It can be inserted into almost any existing pipe. Unlike any other check valve available today, Wastop® can be mounted horizontally, vertically, on an inlet, outlet, in a chamber, or utilizing flanges. Installation is a breeze!

For over 8 years Wastop has been leading with the lowest headloss in the industry.The secret to Wastop®’s effectiveness is its specialized Memory Membrane, inserted inside either stainless steel or pvc pipes depending on the application. The Memory Membrane is constructed of a specially formulated blend of elastomer which gives it exceptional shape retention and chemical resistance. This ensures Wastop® always opens when needed, but then immediately seals to prevent backflow.

WaStop Stainless Steel series can be used in sewer and storm/surface water applications as well as for stopping odour escaping from combined sewers.  The stainless steel series is a complete range from DN 100mm (NPS 4″) to DN 1800mm (NPS 70″).  The WaStop Stainless range fits inside the existing pipe.  For more information regarding installation please see below.

How it works

The revolutionary patented and certified Wastop® inline check valve can be installed in minutes in a pipeline or chamber. It can be installed either horizontally or vertically and either at an inlet or outlet. WaStop® can be installed to prevent backflow in all cases.

Flow in the normal direction causes a slight pressure buildup against the membrane which in turn causes the membrane to open just enough to allow the flow to pass unhindered. When backflow occurs the membrane fills with water or gas and acts as a stopper blocking all back flow in the pipe or drain. WaStop® check valve can be designed to withstand up to 12 meters back pressure.