Flood-Guard operates like a check valve to seal-off water back-up caused by overloaded sewers. Installs in minutes. Standpipe models available for use in extreme, extended pressure situations. Float models available in 2”, 3”, and 4” sizes. Standpipe models available in 3” and 4” sizes. Built Here. Backed Here. The Flood-Guard™ can be installed in minutes. A screwdriver is all that you need. Once in place, it can prevent property damage and a very messy clean-up job. Float models are available in 2”, 3”, and 4” sizes. For extreme, extended pressure (for instance, where homemade seals have popped out of the line,) we recommend our Flood-Guard standpipe models. Standpipe models are available in 3” and 4” sizes. The 4″ Standpipe Flood-Guard is threaded to receive 1-1/2″ IPS pipe. On the 3″ model, the pipe is slipped through the rubber gasket before the screws are fully tightened. Gaskets are made of molded rubber, and all metal parts are plated or stainless steel. Related Products Not Sure Which Tool? We Can Help! Check out our Pro Tool Selection Guide or chat with a Drain Brain! We’re here to answer any questions and help you find the right tool for the job. © 2026 General Wire Spring Co. All Rights Reserved.