Pressure test leak hidden behind wall
A hidden pressure-test leak needs a controlled investigation: depressurize if required, mark the location, open access safely, repair, cure, and retest.
Watch out Do not keep the system pressurized while improvising access or ripping ceiling apart. Check Do not reach blindly into an inaccessible live test leak. Mark the tile/grid/location where air is suspected. Coordinate access/removal with foreman or ceiling trade. Inspect corner, clip, gasket, access door, collar, or seam. Repair with approved method and retest after cure. Steps Do not reach blindly into an inaccessible live test leak. Mark the tile/grid/location where air is suspected. Coordinate access/removal with foreman or ceiling trade. Inspect corner, clip, gasket, access door, collar, or seam. Repair with approved method and retest after cure. Say this to your foreman We have a suspected hidden leak at [location] during the pressure test. Do you want the system depressurized/opened for inspection before repair?
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