Ashirvad SWR Pvc Non Return Valve 160 mm (6") NRV - 70001234

This UGD fitting prevents the undesirable reversal of the flow of water from its intended direction in the piping system. Backflow is dangerous because it can allow plumbing systems to become contaminated and unusable. Non-return valves are simple and effective devices for reducing the risk of flood damage caused by surface water flowback through the underground drainage system. Prevents the backflow of contaminated or polluted water in the plumbing system. Contains an anti-rodent flap that prevents material disintegration due to pests and mice.