2026-05-06 · AC Repair Tuscaloosa
The Attic Drain Line That Floods Tuscaloosa Ceilings Every Summer
Every summer in Tuscaloosa, ceilings come down over a 75-cent piece of PVC. Here is how a clogged condensate drain line turns into thousands in water damage — and how to stop it.
The Physics of the Problem
Alabama's humidity means your AC pulls gallons of water out of the air every day. That water drips into a pan and exits through a small PVC drain line. Warm, dark, constantly wet — it is a perfect algae farm. By mid-summer, slime narrows the line until it plugs completely.
If your air handler sits in the attic — as most do in Tuscaloosa's slab homes — that water has nowhere to go but over the pan edge, through the insulation, and onto your ceiling drywall.
Warning Signs Before the Flood
- Musty smell when the AC kicks on
- Water stains appearing near hallway or closet ceilings
- The float switch shutting your system off repeatedly (that switch is doing its job — do not bypass it)
- No dripping from the outdoor drain line on a humid day when the AC has been running
Prevention Is Absurdly Cheap
A vinegar flush every month or two during cooling season, or algae tablets in the pan each spring, prevents nearly every clog. Our tune-ups include a full drain flush and treatment — it takes ten minutes and has saved more Tuscaloosa ceilings than any other single thing we do.