Description: Product line name: Water Drain Valve Material: Brass Color:Brass Tone This air compressor/tank pressure safety relief valve is a safeguard to protect the compressor from back pressure. It is mainly installed in small air compressor systems, gas storage tank, air receiver tank, and other related applications. Features: brass tone color, metal construction, male thread connector, rotary shaft. The valve is as a pollution discharge equipment of air compressor. Metal construction and stainless steel spring for corrosion resistance and lasting performance . The safety valve is an indispensable safety equipment of air compressor. The instruments should be properly maintained when using or handling, not intense vibration, avoid instrument damage. Note: Before ordering, please confirm the right size!