I recently received the following email: Advice needed on thermal expansion control. The homeowner has done his research and makes valid points regarding the conflicts within the UPC that was adopted by his local AHJ.
Pressure relief valves protect fire sprinkler system components by relieving excess system pressure from supply surges or temperature changes. Since the 2010 edition, NFPA 13: “Standard for the Installation of Sprinkler Systems” has required pressure relief valves to be installed on all wet pipe fire sprinkler systems. But picking the correct relief valve for a specific system does need a little preplanning.