Do not leave standard galvanized duct in a corrosive pool environment if the spec calls for something else.
Check
Look for white rust, red rust, pitting, seam staining, or coating failure.
Confirm whether the duct is in supply, return, exhaust, or pool chemical air.
Check material schedule for stainless/aluminum/coated systems.
Verify fasteners and hangers are compatible too.
Hold cover until material direction is confirmed.
Steps
Look for white rust, red rust, pitting, seam staining, or coating failure.
Confirm whether the duct is in supply, return, exhaust, or pool chemical air.
Check material schedule for stainless/aluminum/coated systems.
Verify fasteners and hangers are compatible too.
Hold cover until material direction is confirmed.
Say this to your foreman
The galvanized spiral at [pool/location] is already corroding in chlorine/humid air. I documented the seams and checked the material concern. Do you want this held for specified corrosion-resistant material?