Solenoid Valve for RO System 2-way normally closed Voltage:110/220V,50/60Hz,24V ... :1/8",1/4" With TUV certificates Solenoid Valve for RO System 1. 2-way normally closed, 1/8" & 1/4" pipe ... :EPDM, body: PP, Nylon;10.Reverse osmosis solenoid valve with CE TUV, ISO9001 approvement.