The patented Wastop® inline check valve has been the innovator and industry leader since its inception. 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 14 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 72″).  The WaStop Stainless range fits inside the existing pipe.  For more information regarding installation please see below.

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.

The model to the left is a 3D PDF.

WaStop® check valves are designed to fit inside standard dimension pipes of most materials.  The inner diameter of the existing pipe is important for determining the correct WaStop for your applications. A graduted seal is used to ensure the WaStop fits tightly giving each WaStop dimension a wide range of pipes into which it fits. The standard WaStop is manufactured using stainless steel (EN1.4301/AISI 304). WaStop® can be customised to fit your specifications. Housing: Stainless steel SS2333 (EN.1.4301). Stainless Steel 2346 (EN.1.4404) can be ordered at extra cost.

WaStop - The ingenious inline check valve animation Video

This film show the WaStop Original Inline Check Valve demonstration unit in action.  It shows both flow in the right direction, and backflow being stopped.

WaStop - Ingenious Inline Check valve with pulsating flow mitigating blockages Video

WaStop - the ingenious inline check valve has a pulsating flow which ensures blockages don't occur, as well as keeping the pipes upstream, and downstream from building up sediment.

WaStop Ingenious Inline Check Valve Beam River Pump Station Video

WaStop(r) The ingenious inline check valve. Thanks to Aquatic Control Engineering this installation was completed with three DN1400 WaStop protecting the Beam River pump station from backflow.

WaStop Inline Check Valve Demo unit at IFAT Video

WaStop Inline Check Valve Demo unit at IFAT

WaStop Installation Film from KWH Video

A WaStop inline check valve installed by KWH

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