The Black Diamond Pressure Relief Valve is a vital safety component that helps ensure proper and secure air compressor operation by releasing excess pressure when needed. Rated for 175 PSI and featuring a 1/4 in. NPT connection, this ASME certified valve is compatible with all air compressors equipped with a 1/4 in. NPT port. Constructed from exceptionally strong and durable brass, it delivers reliable, long lasting performance in demanding shop and jobsite environments. Designed for easy installation using standard tools, this pressure relief valve is an ideal replacement during routine maintenance to help maintain safe, efficient, and dependable compressor performance.