Your old water heater, after years of faithful service, quit working and needs replacing. You have a 40-gallon water heater, which is a standard size for most homes. Installing a new water heater seems like a rather daunting task, but you actually can install a water heater yourself.
Things You'll Need
- Pipe wrench or adjustable pliers
- Electrical tester
How to Install a 40-Gallon Water Heater
Turn the power off to the water heater before working on it -- electricity and water do not play well together.
Drain the water heater. Hook a hose to the drain at the bottom of the water heater and run it outside or to a floor drain, if one is near your water heater. (note the warnings listed at the end of this article.) Open the drain for the water heater all the way and make sure the water is flowing well through the hose. Then turn off the water to the water heater. Open the relief valve at the top of the water heater and turn on a couple of hot-water faucets in the house. This breaks the vacuum and allows the water to drain properly.
Disconnect water lines. While the water heater is draining, disconnect the hot- and cold-water lines going in at the top of the water heater.
Disconnect the electrical wires. Double-check to make sure you have turned off the power to your heater. Use your electrical tester on the top element to be certain the power is actually off. Disconnect the electrical wires at the top of the water heater.
After the water heater has finished draining, remove it and replace it with your new water heater. You will reconnect your new water heater exactly like you disconnected your old water heater. Leave the power to the water heater off. Turn on the water, though. Leave at least one hot-water faucet on in the house until the water heater finishes filling. Check for leaks, then turn on the power to the water heater. In a short time, after the water has heated, you will be ready to use hot water normally.
Tips & Warnings
- If you cannot find a cutoff valve for the water on your heater, you can cut off the water to the entire house. You can replace a 40-gallon water heater with a different size water heater. However, this usually requires certain adjustments when installing, which you may not be comfortable doing. In that case, be sure to call a licensed, professional plumber.
- Always make certain that the power is off to the water heater before touching any of the electrical wires. Do not run the drain hose into a bathtub, because water does not flow uphill. Be careful where you place the end of your drain hose, because the water coming out of your water heater will be hot. Hot water can kill flowers, plants, and grass. If you have problems, you should always call a licensed, professional plumber.
The Average Cost of a Hot Water Heater
What once was a luxury is now a necessity: heated water. Water heaters are found in every home, apartment and mobile trailer...
How to Install a Whirlpool Electric Water Heater
Whirlpool sells a number of electric water heaters that differ in type and capacity, from the Energy Smart, self-cleaning models to their...
How to Wire a Bradford White Hot Water Heater
Bradford White manufactures water heaters for both home and commercial use. Their line of home water heaters feature a line of smaller...
GE 40-Gallon Water Heater Specifications
A water heater keeps your water hot so you constantly have warm water when you turn on your faucets. General Electric creates...
The Best Electric Water Heaters
Electric water heaters are household appliances designed to provide homes and buildings with hot water in bathrooms and kitchens. These types of...