... Shutter:PPO3.Spring:Stainless steel4.O-ring:EPDM5.Port:Inlets-M,Outlet-M Solar heater thermostatic mixing valve Features ... water inlet-marked C.3.After temperature setting, if inlets temperature or pressure fluctuates, outlet temperature variation is within ... , cold water inlet-marked C3.After temperature setting, if inlets temperature or pressure fluctuates, outlet temperature variation is within ...