How to Remove a Water Heater

Ready to upgrade your water heater? Great. The first step to take is removing your old water heater. While hot water heater removal might seem like a straightforward DIY task, it’s important to understand what’s involved, from disconnecting lines to properly draining and disposing of the unit. Keep reading to learn how to remove a water heater safely.

Signs It’s Time to Replace Your Water Heater

Before we jump into how to remove a hot water heater, here are a few signs it’s time for a new one:

• Rusty water or metallic-tasting hot water
• Loud rumbling or banging sounds from the tank
• Leaks or pooling around the base — this could signal major water heater leaking issues
• Inconsistent hot water or no hot water at all
• The unit is 10-15 years old — this is the prime time to replace a water heater

Is It Easy to Remove a Water Heater?

Removing a hot water heater can be a manageable DIY project if you’re comfortable with plumbing and electrical tasks. But keep in mind:

• Water heaters are heavy and awkward to move.
• Gas and electric connections can be dangerous if mishandled.
• You may need a permit or inspection.

If you're unsure at any step, it’s safer (and often required) to hire a licensed plumber.

Water Heater Removal Preparation: Tools and Safety Precautions

Before you start, gather these essentials:

• Pipe wrench or channel locks
• Screwdrivers (flathead and Phillips)
• Garden hose
• Voltage tester (for electric units)
• Adjustable wrench
• Towels or a bucket
• Dolly or cart for removal

Additionally, be sure to follow these safety tips:

• Turn off the water and power before doing anything. Turn off the gas if it’s a gas water heater.
• Allow the tank to cool before draining
• Be cautious around gas lines — call a pro if you smell gas
• Always follow local plumbing codes

How to Remove a Water Heater: Step-by-Step

It’s finally time. Here’s how to change out a water heater.

1. Turn Off the Power Supply

1. If you’re removing an electric water heater, shut off the circuit breaker.
2. For a gas water heater, turn the gas valve to “off.”
3. Double-check with a voltage tester to confirm there’s no live power.

2. Shut Off the Water Supply and Drain the Tank

1. Turn off the cold-water inlet valve (usually on top of the unit).
2. Attach a garden hose to the tank’s drain valve.
3. Open the valve and run the hose to a floor drain or outside.
4. Open a hot water tap in the house to help the tank drain faster.

3. Disconnect Water Lines and Power Source

Want to know how to properly disconnect a water heater? Here are the steps:

1. Unscrew the hot and cold water supply lines.
2. Disconnect the hot water heater’s wiring or gas lines.
3. For electric heaters, cap the wires with wire nuts.
4. For gas, carefully unscrew the connector and secure the valve.

4. Remove the Tank Safely

1. Once the tank is drained, remove any mounting brackets or straps.
2. Carefully slide the unit onto a dolly.
3. Move the old tank out of your home and prepare it for recycling.

How to Remove a Tankless Water Heater

Even well-maintained tankless water heaters will need to be replaced eventually. Removing a tankless water heater is a little different:

1. Turn off the power, gas, and water supply.
2. Disconnect water lines and recirculation pipes.
3. Unfasten mounting brackets.
4. Disconnect venting and gas (if applicable).
5. Remove the water heater from the wall.

When to Call a Professional for Water Heater Removal

When you’re trying to uninstall a water heater, there are a few key times you’ll want to call a professional for help. These include:

• You’re uncomfortable with electrical or gas disconnections.
• You lack the proper tools or strength to remove the unit safely.
• You need help installing the new system immediately.

Obviously, doing a water heater removal yourself can save you a lot of money. But that’s only if you do it right. If you mess something up, you’ll likely spend twice as much as just calling a plumber from the start.

Plumbers also know all of the common water heater problems, like the back of their hand. They’ll be able to determine if you can salvage your water heater with a repair or if you’re better off with a full replacement.

Frequently Asked Questions 

How to properly disconnect a water heater?

Always shut off the power or gas, then turn off the water supply. Drain the tank fully, and carefully disconnect all lines using the proper tools. 

Can I change out my own water heater?

Yes, if you're experienced and understand local building codes. But keep in mind that improper installation can lead to leaks, fire hazards, or gas leaks. It’s often best to hire a professional.

Do I need a permit to remove or replace a water heater?

Most cities and counties require a permit for water heater replacement, especially for gas units. Always check with your local building department before starting.

How do I dispose of an old water heater?

Contact your local recycling center, scrapyard, or waste management service. Some retailers offer haul-away options when you buy a new one.

Uninstall a Water Heater With the Help of the Pros

Removing a water heater isn’t always easy. Roto-Rooter can help make the transition smooth, safe, and up to code. If you're unsure about disconnecting lines or hauling away a heavy unit, leave it to the licensed experts.

Ready to upgrade your system? Call us today to schedule your water heater removal and replacement.