TESTANDRAIN® Relief Valve, 1/2 in, MNPT, Brass

The Model 7000L is a lockable pressure relief valve specifically designed to relieve excess pressure caused by pressure surges or temperature changes in all wet fire sprinkler systems. Model 7000L pressure relief valves comply with NFPA 13 requirements stipulating that a pressure relief valve must be installed on all wet systems and downstream of all pressure reducing valves. Model 7000Ls feature a bronze body, stainless steel spring, and plastic casing with a "hydro" tab and "flush" tab. Using a hex wrench and the tabs, lock the 7000L closed for hydrostatic testing without removing the valve from the system. The Model 7000L can be purchased individually or as an optional part of the TESTanDRAIN kit with all necessary drainage piping and connections for use with all AGF TESTanDRAIN® valves. Pressure relief valves can be installed on a TESTanDRAIN® valve without removing the valve from the line or draining the system completely. The 7000L features a 1/2" MIPT inlet and FIPT outlet and is UL Listed and FM Approved. It is rated for 175 PSI Systems. Other Ratings Available: 200, 225, and 300. Please specify PSI when ordering.

UL and FM standards for sprinkler system pressure relief valves require relief valves to operate within a range of their ratings. FM requires a relief valve to OPEN at a pressure no less than 85% of their rating and UL requires OPENING at a pressure no greater than 105% of their rating. Both standards require the relief valves to CLOSE within a percentage below OPEN. Choose the relief valve comparing static pressure to 90% of the relief valve's rating to determine the estimated minimum OPENING and 80% of the relief valve's rating for approximate maximum CLOSING. The relief valve should be installed where it is easily accessible for maintenance. Care should be taken that the relief valve CANNOT be isolated from the system when the system is operational. A relief valve should NEVER have a shutoff valve or a plug downstream of its outlet.