How to Drain a Hot Water Heater (Quick Guide)

Sometimes you don’t need a full maintenance flush—you just need the tank empty so you can move it or replace a part. Here is the fast-track method.

The 5-Minute Checklist

1. Power Off: Turn off the gas or flip the breaker. NEVER drain a powered heater—you will burn out the elements or damage the tank.
2. Connect Hose: Connect a garden hose to the drain valve.
3. Shut Off Cold Water: Turn the cold water inlet valve to the “Off” position.
4. Open a Faucet: Turn on any hot water tap in the house.
5. Open Drain Valve: Open the valve at the bottom.

How to Speed Up the Process

If the water is draining slowly, the most likely cause is a vacuum. Ensure the hot water faucet upstairs is fully open. If it’s still slow, you can carefully lift the handle on the T&P Relief Valve on the side of the tank to let more air in.

If No Water Comes Out

If you open the valve and nothing happens, the valve is likely clogged with sediment. Use a wire coat hanger or a thin screwdriver to poke into the valve opening to break up the blockage. Prepare for a sudden gush of water!