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• BAL Rated: Yes
it is just a perfectly normal PTR valve operation
Internal relief valve for reduced installation clearances
Model: DC103BC
The APO PTR20/1000 20mm (3/4") 1000kPa PTR Pressure and Temperature Relief Valve
AVG ECV20-700-LF 20mm 700kPa ECV Expansion Control Valve Female Thread • BAL Rated: YesOverview The AVG ECV20 700 LF 20mm (3 4") 700kPa ECV expansion control valve is used to regulate the water pressure inside hot water services, including heat pumps, electric, gas storage and solar water heaters across all mainstream brands in Australia such as Rheem, Vulcan, Rinnal, Dux, Aquamax, Thermann, Apricus and Solahart. The ECV expansion control valve is color coded and used in conjunction with a matching color coded PTR pressure temperature