Close up of bearded man filling pipes with pressurized air to inspect for leaks in new installation. Worker using manometer, checking gas tightness of heating system. Concept of gas tightness testing.

Close up of bearded man filling pipes with pressurized air to inspect for leaks in new installation. Worker using manometer, checking gas tightness of heating system. Concept of gas tightness testing. - 162484759

Close-up Of A Plumber Adjusting Pressure Gauge On The Wall

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