The Wastop backflow valve is a great way to protect your home from flooding, sewage odor, and back flow. It is easy to install and can fit into most existing pipe systems. You can mount it vertically, horizontally, or with flanges. It is made of stainless steel for durability and corrosion resistance, and it is available in both a manual and electric version.

Stainless steel

The WaStop backflow valve is an in-line backflow and flood prevention valve made of stainless steel grade 304 or 316. It incorporates a cone-shaped chloroprene membrane and is designed to resist pressure up to 8MwC. The standard-size valves fit in a standard pipe and can be installed either horizontally or vertically. They can be configured for inlet or outlet applications and are suitable for a variety of water pressure and flow rates.

The Wastop valve’s unique patented design stops backflow by preventing floods and protecting pipes. It also prevents infiltration by insects, small animals, and flotsam. It also prevents odours from seeping into pipes.


A PVC Wastop backflow valve is a high-quality backflow preventer. Designed to work in most existing pipe systems, it can be installed horizontally or vertically. The valve can be mounted on the inlet or outlet, using flanges to attach to the pipe.

The patented construction of the Wastop (r) valve prevents backflow from a pipe and provides flood protection and odour protection. It also prevents insects and small animals from entering the pipeline. TheĀ valve also prevents odours and other gases from seeping into the system.


The Wastop backflow valve is a patented device which stops backflow and protects your home from flooding and odour. Its unique patented construction also prevents infiltration from small animals, debris, flotsam, gases and insects. It can be installed in the inlet, outlet and horizontal or vertical positions.

The WaStop backflow valve is made of two parts: an elastomer sleeve and a pipe made of plastic or stainless steel. The sleeve is made from a specially formulated blend of elastomers that provides exceptional chemical and shape retention. Its innovative design enables it to withstand a number of meters of pressure in the opposite direction. Once the flow is stopped, the valve automatically seals, preventing any back flow.

Memory membrane

A Wastop backflow valve can be installed in almost any pipe without the need for modifications. It can be mounted horizontally or vertically, on the inlet or outlet, or in a chamber. The valve is designed to accommodate up to 12 meter backpressure. For additional flexibility, Wastop valves can also be mounted using flanges.

The main feature of a Wastop backflow valve is its Memory Membrane, which is specially formulated elastomer. This elastomer material is extremely strong and resistant to chemicals, yet retains its shape. The elastomer membrane’s shape retention is exceptional and it helps the Wastop valve maintain its seal at all times.

Inline check valve

The WaStop inline check valve is a simple, yet effective way to prevent backflow, flooding, and sewage odour. The valve is made of stainless steel and installed inside a pipe. This ensures that only fresh water can pass through, and prevents seawater from entering the pipe. Furthermore, it offers up to 20 years of reliability, reducing maintenance costs substantially.

A WaStop inline check valve is compatible with most pipe sizes from 12mm to 1800mm. The valve has a low head loss differential and can be installed at any angle. It does not require a head wall and is designed to withstand backflow from either a pipe or a drain.