Related illustrations

0861

Pressure reducing valve

· p. 145

The illustration shows a pressure reducing valve supplying makeup water from the house water system to a hot-water boiler. Two simplified valve cross-sections compare operation when boiler pressure is at or above the val

0858

Pressure reducing valve location

· p. 145

The illustration shows a heating boiler with a blue cold-water return pipe, a red hot-water supply pipe, and an exhaust flue above it. A horizontal makeup-water supply connects to the cold-water return near the boiler. A