The Kleinn Model 52250 is a premium 250 PSI pop-off safety relief valve engineered as a critical, safety-coded pressure protection device for your onboard air system. Featuring a durable heavy-duty brass construction that resists corrosion, this valve is designed with a standard 1/4" Male NPT fitting to easily thread directly into your air tank. It acts as an essential safeguard for your pneumatic setup and is specifically designed to work with the Model 2165 pressure switch (165 PSI ON - 200 PSI OFF), automatically popping off to release a sudden burst of excess air if the pressure switch fails or if the tank surpasses safe operating limits to protect your compressor from burning out.