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Filling valve is the filling device for filling fluid for the pressurized solar water heater system.It is usually used for solar collector system.The solar water heater system need fill glycol as media for heat exchange. Then we can install filling valve in pipeline, we can use the pump to suck the glycol from container to inlet of filling vavle and closed the pipeline valve untill the glycol full from the outlet of vavle.But try to wait a moment to make sure the air in pipeline is released by flow out glycol. Then closed all the valves. Open the pipeline valve for the working.
Material: copper ,three valves for control
Size :3/4’’
