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Sealing, Mastic, Tape & Leakage Testing

Temporary Test Caps And Plugs

Temporary caps and plugs need to hold pressure without damaging the duct, damper, collar, or access door during testing.

Yellow / Check First2ndBatch 6

What This Helps With

Temporary caps and plugs need to hold pressure without damaging the duct, damper, collar, or access door during testing.

Apprentice words: temporary duct cap, test plug, pressure test cap, cap branch for leak test

Common problem: Tape-only caps peel off, test plugs get put in the wrong place, or open collars get missed.

Check First

Cap material, fasteners, seal, removal plan, and whether the cap can handle the test pressure safely.

What Not To Do

Do not rely on loose tape for pressure. Do not screw into listed damper frames or rated assemblies without direction. Do not forget to remove temporary caps after testing.

What can go wrong: Tape-only caps peel off, test plugs get put in the wrong place, or open collars get missed.

Better Foreman Question

What temporary cap method do you want for these openings during the leakage test, and who verifies removal after?

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Verify With

Source to verify: Project test plan, foreman direction, TAB procedure

Safe wording: Temporary test setup must be removed and documented when testing is complete.

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