The 110mm non return valve acts as a gate or flap to allow waste water to escape but to keep rats out. The 110mm non return valve should be fitted within the manhole or inspection chamber,
We are a pest control company that have installed hundreds of valves. We identified a problem with one way valves on the market that are made of plastic and have been damaged by rats making them ineffective.
Our valve consists of a stainless steel pipe that will fit in a 110mm plastic or clay sewer outlets and prevent rats gaining access to your property via a broken sewer pipe. The valve also uses a metal face plate flap and will withstand rat gnawing
Please find a demo video below
We have also fitted rubber seals to prevent back flow of water. The steel body of the valve has been cut at an angle so it can be installed on a angle without the door opening enough to allow rodent access.