Bell & Gossett 110197LF Model No. F-3 Dual Valve is a combination of Pressure Reducing Valve and Pressure Relief Valve. The valve's boiler and fill NPT connection measures 1/2". The noncode relief valve function is to provide fill overpressure protection.

The Bell & Gosset Dual Unit Valve is designed for safe usage featuring a lead-free brass body, non-corrosive parts, and easy to clean strainer. There are two types of pressure reducing valve to choose from, first is the fast-fill option and secondly the one with a new union tailpiece connection.

Note: This noncode relief valve is not to be used alone to protect the system. An ASME type safety relief valve must also be installed on the system for output overpressure protection.