ASTM A126 Grade B Check Valve

An ASTM A126 Grade B check valve is an automatic non-return valve cast from Grade B gray cast iron (ASTM A126 Grade B), engineered to prevent backflow in low-to-medium pressure municipal water, sewage, and commercial plumbing lines. The cast gray iron construction provides excellent mechanical vibration damping and compressive strength at an economical price point, while its internal swing or lift disc automatically seals shut under backpressure to protect upstream pumps. Conforming to standards like AWWA C508, MSS SP-71, and ASME B16.1, these reliable utility valves are primary specifications in municipal water treatment facilities, building fire protection risers, and drainage pumping loops, allowing civil contractors and plumbing managers to secure dependable backflow prevention by importing certified ASTM A126 Grade B check valves directly from premier manufacturers in China via our advanced B2B commercial platform.