Water Heater Leaks and AC Drain Pan Overflow in Katy

Part one: water heater leaks

Why tanks fail

A storage tank water heater holds a lot of water inside a steel tank. Over the years, minerals and sediment settle at the bottom, and the metal inside can corrode. Most makers give an expected service life in their manual, and many tanks are replaced well before the house is. A tank that is old, never flushed, or showing rust is more likely to fail. Check the label and the manual for yours.

Failures come in two broad forms. A slow weep around a fitting or the base is common and easy to miss. A split tank is the sudden version, and it can put a lot of water on the floor quickly.

Parts that cause leaks

• The tank itself. A leak from the bottom or a seam usually means the tank is done.
• Supply connections. The cold inlet and hot outlet can drip at the fittings.
• The T&P valve and discharge pipe. The temperature and pressure relief valve opens when pressure or heat gets too high. A pipe runs from it toward the floor or outside. If that pipe drips or runs, tell a plumber. Never cap or plug it. It is a safety device.
• The pan. Many heaters in garages or attics sit in a metal or plastic drain pan with a pipe to a safe discharge point. A pan with water in it is a warning sign.

Signs to watch for

What to do first

1. Shut off the cold supply to the heater. The valve is usually on the pipe on top.
2. Turn off the power or gas. For an electric unit, switch off its breaker. For gas, set the control to off per the label. If you smell gas, leave the house and call the gas utility or 911 from outside.
3. Do not stand in water near electrical items. If water is around the panel or outlets, stay out and have an electrician check it.
4. Photograph the heater, the label and the water. Keep the old unit if an insurer might ask to see it.
5. Call a licensed plumber. Texas plumbers are licensed by the Texas State Board of Plumbing Examiners.

For garage and attic situations, water can run under walls and into insulation and ceilings below. Our page on water heater leak cleanup in Katy goes into how a pro handles it.

Plumber or restoration company

Part two: air conditioner drain leaks

Why water forms

In a humid Houston-area summer, the indoor unit pulls a lot of moisture out of the air. That moisture collects as AC condensate, which drips into a pan and flows out through a drain line. On a hot, wet day, that can add up to a lot of water over many hours.

In many Katy homes, the indoor unit sits in the attic. A leak there is hard to spot. Water drips onto insulation and the ceiling, and by the time a brown spot appears in a room, the drywall may be saturated.

How the system is meant to drain

• The AC drain line is a small pipe, often white PVC, that carries condensate outside or to a drain.
• The AC drain pan sits under the indoor unit as a backup. If the line clogs, the pan catches the overflow.
• A float or overflow switch shuts the system off when water rises. Not every home has one, and a switch can fail.

Algae, slime and debris can clog the line over a season. Water then backs up into the pan and can spill past it.

Signs of an air conditioner leak

• A yellow or brown stain on a ceiling below an attic unit
• Water dripping from a ceiling light or vent grille
• Standing water in the pan, or a pan that looks rusty
• The system shutting off unexpectedly, which can mean a float switch has tripped
• Swollen or soft drywall around a closet

Safe first steps

1. Turn off your AC from its control. This stops the flow of condensate.
2. Switch off the breaker for the indoor unit if you can reach it and the area is dry.
3. Stay out of the attic if the insulation is wet and the lighting or wiring is near. Wet insulation is heavy and can hide hazards.
4. Catch drips with a bucket. A bulging ceiling is heavy and can fall, so stay out from under it.
5. Photograph the stain and the pan.
6. Call an AC technician to clear the line and check the unit. Ask whether the overflow switch works.

Our page on AC drain overflow water damage in Katy covers the cleanup side in more detail.

Technician or restoration company

An AC technician clears the AC drain line, checks the pan, tests the float switch and confirms the equipment is working. A restoration company deals with the water that already escaped. That means removing wet insulation, opening ceilings if needed, drying framing and drywall, and checking moisture. The EPA says that drying wet materials within 24 to 48 hours usually keeps mold from growing, so a damp attic should not wait for weeks.

Prevention and upkeep

Simple habits catch most of these problems.

• Read the manuals. Each maker gives maintenance steps and schedules.
• Flush the tank if the manual calls for it, or have a plumber do it.
• Look at the T&P pipe and the pan once or twice a year.
• Clear the AC drain line on the schedule your maker or technician suggests. Some people pour a cleaning product in, but only use what the maker approves.
• Check the AC drain pan in spring before the heavy season. Look for water, rust or a sluggish drain.
• Test the overflow switch by following the maker's steps, or ask the AC technician to do it.
• Add a water alarm in a pan or the attic for early warning.
• Know your shutoffs. The main water valve, the heater's cold supply valve and the breakers matter in an emergency.

Insurance in general terms

Many standard policies cover sudden and accidental water damage from plumbing and equipment. They are often less generous about damage from slow leaks that went on for a long time, or from poor upkeep. Wording differs. The policy may not pay to replace the water heater or repair the AC drain line itself, even if it covers the damage the water did. Check your policy and call your insurer before you authorize major work, and keep receipts, photos and the plumber's or technician's report. See our guide to homeowners insurance and water damage in Texas. The Texas Department of Insurance offers consumer help at tdi.texas.gov.

If the damp spot is in a floor, see slab leak signs in Katy homes. For the big picture of the drying process, see water damage restoration in Katy, and ask neighbors in places like Cinco Ranch, where attic units are common, what they have seen.

When the damage is done

Once the leak is stopped and the water source is fixed, wet materials still need drying. If you want an independent local company to take that on, you can request help and we work to connect you with one. The pro's own schedule sets the timing. Ask for proof of insurance and IICRC certification, and ask for the scope of work in writing.

Sources

• Texas State Board of Plumbing Examiners: tsbpe.texas.gov
• Texas Department of Insurance: tdi.texas.gov
• U.S. Environmental Protection Agency, mold and moisture: epa.gov/mold
• U.S. EPA, a brief guide to mold, moisture and your home: epa.gov/mold/brief-guide-mold-moisture-and-your-home
• Maker manuals for your water heater and AC drain pan, for maintenance steps