Pressure reducing/relief valve installed backwards

Heating · Controls · printed page 146 (PDF page 147)

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Book index entries

Relief Valve Installed Backwards Pressure Reducing/Relief Valve Installed Backwards on Boilers

Text in the illustration

exhaust flue
hot water
cold water return
pressure reducing valve
pressure relief valve
house water supply
boiler

Generated explanation

The illustration shows a hot-water heating boiler with an exhaust flue, a red hot-water supply pipe, and a blue cold-water return pipe. A horizontal house water supply connects to the boiler return through a pressure reducing/relief valve assembly. The pressure reducing valve is depicted on the boiler side of the assembly, while the pressure relief valve is on the house water supply side with a discharge pipe extending downward. A red prohibition symbol over the assembly identifies this reversed installation as incorrect.

Components

hot-water boiler exhaust flue hot-water supply pipe cold-water return pipe house water supply pipe pressure reducing valve pressure relief valve relief valve discharge pipe water supply shutoff valve

Defects shown

Pressure reducing/relief valve assembly installed backwards