Protect your high-pressure pump system from catastrophic over-pressurization. This heavy-duty safety relief valve acts as an essential insurance policy for pressure washing skids, sewer jetters, and industrial hydro-systems operating between 1,000 and 6,000 PSI. Featuring a rugged 1/2" Male Pipe Thread (MPT) inlet, it automatically pops open to vent dangerous pressure spikes caused by unloader failures or line blockages, saving your pump head and plumbing from cracking.