Selector valve .Competitive price and good quality .Certification:CE,ISO9001 .5-15years warranty .OEM available Selector valve description:Model:FD-SV-20 1.Temperature range:49---54C/40-45C/35-40C2.when coming water is below 49,it will flow out from cold port.When abouve 54,flow from hot port.3.When between 49--54C,it will flow from both ports.4.Normally it is applied in solar heater+gas/electric ...