The genuine Watts 1040S Series pressure reducing valve is engineered to efficiently lower incoming water pressure to a safe, consistent level, protecting plumbing system components and reducing water consumption. This durable valve features a bronze body and a single union FNPT connection, suitable for water supply pressures up to 20.7 bar (300 psi) and temperatures up to 60°C (140°F). It includes a bypass feature to manage thermal expansion pressure and offers an adjustable reduced pressure range of 1.7-5.2 bar (25-75 psi), factory preset to 3.4 bar (50 psi). Ideal for industrial and commercial water systems requiring reliable pressure regulation.