Troubleshooting
Water Heater Leaking
Quick answer
Where the leak is matters. Top connections = a fix. Around the temperature/pressure relief valve = adjustable. From the tank itself = replace, today.
Common causes
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Loose connections at top
easyHot/cold water connections can loosen with thermal cycling. Tighten with a wrench.
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T&P valve dripping
moderatePressure-relief valve doing its job — pressure or temp too high. Check the gauge first; replace the valve if it stays open at normal pressure.
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Drain valve at the bottom
easyPlastic drain valves crack. Easy replacement.
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Tank itself
urgentPinhole leak from internal corrosion. No fix — the tank's done. Replace ASAP before it bursts.
DIY first
- 1 Wipe everything dry, then trace the leak source — top, side, valve, or seam at the base.
- 2 If from the tank: shut off cold water supply (valve at top) and shut off gas/electric. Don't run the tank empty.
- 3 Photograph the leak source and send to us.
Call us if:
- Leak is from the tank itself (always — replace before it bursts)
- T&P valve dripping continuously
- You can't shut off the water supply
Other symptoms in this category
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Diagnosis pointing somewhere serious? Call now.
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Mississauga, ON · Greater Toronto Area and up to 2 hours out — London, Kitchener, Barrie, Kingston, Niagara.