... -way valve and one way valve.HYDRAULIC CIRCUITBuilt with user side and source side water inlet/outlet connectors, water discharge connectors, ... vent valve, mod.4.5÷30 the user side is complete also with expansion vessel, water pump and water flow ... breaker,User side water pump contactor, User side water pump breaker, Microprocessor with function displayModel Details:Cooling: Source side water inlet/ ...