Bell & Gossett 110197LF 1/2" FNPT Lead Free # 3 Dual Unit Valve Set With Fast Fill Feature Specifications: Boiler Connection 1/2" FNPT Relief Connection 1/2" FNPT Pressure Reducing Valve FB-38 Factory Set @ 12 PSI Adjustable Pressure Range 10-25 PSI With Fast Fill Lever Relief Valve Set @ 30 PSI Replaces Bell & Gossett 110197, Sid Harvey B138 and B138R