How to Install an Electric Water Heater

Nov 5, 2025
2 min read

Updated: Mar 20

Installing an electric water heater isn’t rocket science, but it’s not a walk in the park either. Done right, it’ll provide years of hot showers and happy dishwashing. Done wrong, it can lead to leaks, frustration, and higher utility bills. Let’s walk you through the process step-by-step and explain when to call in the pros—like us at Top Tier Trades—for expert help.

Before You Start

Tools and Materials You’ll Need

Screwdrivers
Adjustable wrench
Pipe cutter
Teflon tape
Flexible water lines
Electrical tape
Circuit tester

Safety First

Before touching anything, turn off the power to the water heater at the breaker panel. Double-check with a circuit tester to ensure there’s no live current. Water and electricity don’t mix!

Steps to Install an Electric Water Heater

1. Remove the Old Water Heater

Shut off the water supply and drain the tank.
Disconnect the power and water lines.
Carefully remove the old unit (it might still have some water, so be ready for spills).

2. Position the New Water Heater

Place the new water heater in its designated spot.
Ensure it’s level and secure.

3. Connect the Water Lines

Attach flexible water lines to the inlet and outlet valves.
Use Teflon tape to prevent leaks.

4. Wire the Unit

Connect the electrical wires from your circuit to the water heater’s terminal box.
Use electrical tape to secure connections.

5. Fill the Tank

Open the cold water valve and let the tank fill up.
Check for leaks as it fills.

6. Restore Power and Test

Turn the breaker back on.
Allow the water heater to heat up and test the water temperature.

When to Call the Pros

While DIYing your electric water heater install might seem tempting, there are times when it’s smarter to let the experts handle it. Issues like outdated wiring, improper venting, or local plumbing codes can complicate the process. That’s where Top Tier Trades comes in. We handle the tough stuff so you can sit back and enjoy hot water hassle-free.

Call Top Tier Trades Today!

Ready to skip the hassle and let the pros handle it? Give Top Tier Trades a call. Whether it’s a routine install or an emergency replacement, we’ve got your back with reliable, top-tier service.