The Watts SB1156F 1/2" Bronze Pressure Reducing Valve (Part #0386422) is designed for applications that require reliable pressure control in hydronic heating systems. With a 1/2" sweat connection, this valve ensures a secure, leak-resistant fit. It is preset to regulate incoming water pressure to a consistent 12 psi, protecting the system from excess pressure and ensuring optimal perf... https://www.partshnc.com/sb1156f-watts-12--sweat-bronze-pressure-reducing-valve-set-@-12-psi-0386422