Nex Pest Control supply and install 4 inch and Rat Blockers. Rat blockers are stainless steel non return valves which are fitted into inspection chambers. Rat blockers allow toilet waste to pass into the main sewer network but restrict rats from entering the property’s waste pipes.
How the rat blocker works
The rat blocker works by blocking off sewage pipe access to rats from the outside while still permitting the free flow of water and waste from the inside. The rat blocker fits snugly into your water or sewer pipe. Its steel flap opens when fluids need to flow freely into the sewer, but until then, the flap remains closed and prohibits rodents from entering. Quite simply, fluid flows out, but rats can’t get in. This means that if you have multiple lateral drains only 1 rat blocker is necessary to protect them all.