Watts Water Technologies 9BD-NPTM Inline Check Valve

The Watts 9BD-NPTM Inline Check Valve is a 3/8 in inline backflow preventer with male NPT threads that automatically blocks reverse flow, protecting water, air, and fluid systems from backflow conditions that can damage equipment or contaminate process lines. The brass-bodied valve features an internal spring-loaded design and is intended for inline installation in plumbing, pneumatic, and process lines. Service media include Water, Air, Oil, and Compatible Fluids. Widely used in commercial plumbing systems, municipal distribution networks, booster pump stations, irrigation, water treatment skids, compressed air systems, manufacturing facilities, and HVAC mechanical rooms, it helps prevent reverse flow that could damage pumps, regulators, meters, filtration equipment, and other components, supporting system integrity and operational efficiency. Common replacements include Watts 9D-M3, Apollo 61 Series Inline Check Valve, and Parker Brass Spring Check Valve 3/8" NPT.