At sewerstore our Non Return Valves for Drains provide a cost effective solution to drainage issues associated with rodents and flooding problems. In the majority of domestic rodent infestations we find that rats are entering the property via a broken sewer pipe, the pipe could be cracked or it could have a collapse.

Even with sewer cctv inspections it may not be possible to identify the location of the problem, this is where our 110mm non return valve comes in.

The valve is designed to be push fitted into the outlet of the sewer pipe and will fit all types of pipe including ceramic, clay and plastic drainage types.

We also offer a valve which protects against back flow/flooding, this valve contains a seal and prevents back flow occurring. Our valves are made using stainless steel components making them a extremely durable permanent solution.

The product can be installed by anybody who has a small amount of DIY experience but if in doubt please contact a Plumber, Pest Controller or Drain specialist. Please remember that when working in sewers to wear protective clothing including eye protection and protective gloves due to the risk of disease.

We offer discounts on our prices for volume orders please email us at for a quotation.

We have found that other 110mm non return valve plastic products on the market are simply not upto the task as rats easily gnaw through the body and hinge and provide only a temporary solution.

Our product is a permanent solution and will give many years of rat sewer protection.

As you can see from the image this product is made using high quality 304 grade stainless steel, the internal hinge and body are all made from 304 marine grade stainless steel making is non rusting and extremely long lasting.

More About Our 110mm non return valves

Rats will be moving in and out of the property on a daily basis to feed and find water the valve acts as a flap/gate to prevent them getting back in to the property.

We are a pest control business and after using other products on the market we decided that these were simply not up to the task and decided to develop our own product.

We build these in house and as such can make changing according to the customers requirements.

Please contact us if you have any concerns or questions regarding our products and Non Return Waste Valve