what is the proper way to size a relief for a home hot water heater 50 gallon gas 150000 to 180000 btu/hr input. Need a #/hr calculation with a set pressure of 75 psig
Your relief valve relieving capacity will be in Btu/Hr and not in Lbs/Hr. It rating will be the unit's heat input. You should also have a temperature and set pressure ratings for a hot water heater.