PlumbingUpdated September 13, 2026 · 6 min
Water Heater Leaking From the Bottom: What to Do First
Water near the bottom of a water heater may come from a valve, connection, condensation, or the tank itself. A leaking tank generally needs replacement.
URGENCY
Prompt—urgent if water is spreading
TYPICAL COST
$150–$2,500
Safe checks you can do now
- 1Keep people away from standing water near electrical equipment.
- 2Look for water above the tank that may be running downward.
- 3Check the drain valve and nearby pipe joints visually without tightening hot fittings.
- 4If water is spreading, close the cold-water supply valve if safely accessible.
Common causes
Drain valve leak
Water may drip directly from the small valve near the bottom.
Relief valve discharge
High temperature or pressure can send water down the discharge pipe.
Corroded tank
Water emerging from the tank body usually means replacement.
Call a professional when
- Water is rapidly spreading or reaching wiring.
- The relief valve repeatedly discharges hot water.
- The tank body appears rusted or split.
Related home repair guides
FIXAVUE provides general educational information, not a diagnosis or substitute for an on-site inspection. Call 911 for immediate danger.