150mm Buffalo Plastic Door Retro Fit Non Return Valve

150mm Metex Buffalo watertight non-return flood defence valve. Stainless steel door also discourages rats and rodents from entering a property via the drainage system. Positioned securely into a manhole chamber, the valve works by preventing a back flow of waste water into a property by effectively sealing the chamber outlet in a flood situation. Suitable for use in clay, PVC and cast iron pipe systems to suit installation within either an outlet or inlet of a drainage chamber. Fits all clay, PVC and cast iron pipes 150MM / 6" in diameter Stainless steel flap door discourages rodents from entering the property. The flap allows rats to leave the property but prevents them from coming back up the sewer or drain pipe. Easy to install with a simple push fit design. The rubber fins secure the valve in position in the drain inlet or outlet in the inspection chamber, without the need for any tools. Effectively prevents backflow of sewage and noxious fumes during flooding Removable and reusable Suitable for installation within either an outlet or inlet of a drainage chamber