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0854 Inspecting Pressure Relief Valves - Heating - Controls
 
0854 Inspecting Pressure Relief Valves - Heating - Controls -

Image Text: No piped extension > valve between boiler and pressure relief > extension pipe too small > extension capped, threaded or corroded at bottom > valve set too high (e.g. 50 PSI) > extension pipe dripping > BTU rating of valve does not match boiler > exhaust flue > boiler

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