How To

How to Stop a Water Heater Leak

By Edward Kasper, eHow Editor
Rate: (9 Ratings)

A leaking water heaters can cause thousands of dollars of damage to a home, therefore leaks must be stopped as soon as possible. The origin of the leak must be determined and there is a strong possibility that the tank will need replacement. Before a professional plumber arrives, some steps can be taken to ensure no further damage occurs.

Difficulty: Moderate
Instructions

Things You'll Need:

  • Garden hose

    How to Stop a Water Heater Leak

  1. Step 1

    Turn off all power to the tank at the breaker if using an electric water heater. If using a gas water heater, turn off gas using the gas shut off valve on the gas line that goes into the tank.

  2. Step 2

    Locate a round knob (looks like a wheel) on the right-hand side of the water tank where the cold inlet is. Turn it clockwise until the knob will not twist anymore. Do not over tighten this knob as it may break off if too much pressure is applied. If there is a lever instead of a knob, turn it in which ever direction it will move until it forms a right angle to the pipe.

  3. Step 3

    Go outside and find your water meter if turning the knob or lever does not stop the flow of water into the tank. Look in the box and find the valve closest to the street. It is a small valve that may be turned using a pair of pliers but in some cases you will need a meter key to turn it.

  4. Step 4

    Use a garden hose to drain the tank and prevent further water damage. Screw hose onto the drain located at the bottom of tank.

  5. Step 5

    Turn the drain valve slowly. Be sure the hose drains water into a sink or gutter drain rather than your grass or driveway.

Tips & Warnings
  • Before blaming the water heater tank for the leak, make sure the water relief valve has not opened, which would cause a puddle on the floor.
  • Rust and sediment may drain out of the hose with the water and damage your grass or driveway, so make sure you properly drain your water.
  • Attempting to fix a water heater without experience can be very dangerous, even life threatening, if it is not done properly.
  • There is the possibility of being scalded by hot water and more.
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