Gasketed flapper insures a water tight seal. Flapper design allows for unrestricted flow and easy clean out. Made of corrosion free materials to assure inside remains smooth without flaking or pitting. Used in nominally horizontal drain lines, and branches. All hubs are DWV (Sch. 40) Non-pressure applications only. Easy entry removable cap for visual inspection or cleaning NONE OF THESE PRODUCTS ARE DESIGNED FOR USE WITH COMPRESSED AIR OR GASES. Back Water Valve 2" Regular price: $75.00 Sale price: $40.00 Back Water Valve 3" Regular price: $109.00 Sale price: $95.00 Back Water Valve 4" Regular price: $139.00 Sale price: $99.00 Back Water Valves 6" Regular price: $325.00 Sale price: $225.00 Home: Backwater Valves :Ball Valves:Butterfly Valves: Check Valves:Electric Valves:Gate Valves:Jandy Valves: Pneumatic Valves:Swimming Pool Valves:Three Way Valves: Valve Accessories: