General Wire Drain Flood Guard 2"SKU: 2FHGeneral Wire Pipe Cleaners Flood-Guard Prevents Basement FloodingFlood-Guard operates like a check valve to seal off water back-up caused by overloaded sewers. Water flows normally through the drain until the sewer begins to back up. Then the Flood-Guard float rises to seal off the drain opening until the water recedes.A screwdriver and a couple of minutes are all you need to install a Flood-Guard. Once in place, it can prevent property damage and a very messy clean-up job.Not recommended for extreme, extended pressure (for instance, where home-made seals have popped out of the line). Gaskets are made of molded rubber, and all metal parts are plated or stainless steel.A division of General Wire Wire Spring Co.**