Tranz Former Valve, Fits Existing Float Valves With GHT Fitting On Top, Made From Durable Non-Corrosive GF Nylon, Tranzforms Restricted Flow Valves Into High Flow Valves By Attaching To The Top Of The Existing Valve, & Offering A Full Open Release. 5-100 PSI Range, Uses The Existing Float Parts To Trigger The Additional Full Flow Valve, Durable Molded Housing With A Unique No Twist GHT Fitting On Top, Easy 3 Minute Install, No Tools Needed.