Static field route #19077

What do I do if a VAV hot-water coil fitting gets twisted and starts leaking?

Equipment Connections: RTU, AHU, VAV, Fans & Louvers🟥 STOP / VERIFYV190 answer-gap expansion

📖 Verified core answer

Stop and shut down/isolate the water side as needed. Thin coil connections need backup wrench support; a twisted or cracked internal coil/header needs proper mechanical repair or replacement.

Open in Field Rescue Open category

Field verification checklist

Stop tightening when the coil fitting moves or the casing starts twisting.
Check whether water is active and whether the loop needs isolation/shutdown.
Find leak location: external fitting, coil connection, internal header, or casing.
Document the damage and notify foreman/mechanical piping lead.
Use backup wrench/support method on any remaining connections.

Ask foreman

The VAV reheat coil fitting at [tag/location] twisted and is leaking. I stopped tightening and checked whether the loop is active. Do you want the water isolated and the coil opened/repaired or replaced?

Text to foreman

Route options

AMake the field correction only if it is within your assignment and the approved method.

BHold and document the condition if the fix affects airflow, access, life safety, pressure class, rated assemblies, equipment, or another trade.

CBring the foreman/detailer the location, what you checked, and what decision you need before cover, startup, or rework.

Do not do this

Do not keep cranking on a coil fitting after the coil/header starts moving.

Why this matters

A cracked coil can flood ceilings, damage finished spaces, delay startup, and require coil replacement.

Verification basis

Approved drawings/specs, project coordination drawings, manufacturer instructions/submittals, shop standards, foreman/detailer direction, employer policy, and AHJ/code requirements.