Flo Control 1" Slip Swing Water 1011 Check Valve [1 2lb] (1011 10) slicevalves A properly selected replacement helps A properly selected replacement helps restore intended heating performance while supporting a cleaner repair path for the existing heater assembly Useful when original standpipe and lateral parts are worn or damaged A properly selected valve helps restore intended one way flow control and contributes to cleaner circulation performance The 1 inch slip format and 1 2 pound swing design give this valve practical value because flow control components work best when the replacement matches the plumbing size and operating characteristics of the original system