The Conbraco Industries 10-614-15 3/4 Inch X1 Inch 75, H/W, 1,977,000 Btu relief valve is an essential component of HVAC systems, designed primarily for water heating applications. This relief valve, which has a remarkable 1,977,000 Btu capacity and is made to withstand large heating capacities, is essential for controlling excess pressure. #ConbracoIndustries #10-614-15 #H/W1,977,... https://www.partshnc.com/10-614-15-conbraco-industries-34x1-75-hw-1977000-btu