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February 2024

Water Heater Installation

Unless you have a backup, a water heater is essential for daily tasks like bathing and washing laundry. Replacing it may be necessary if yours is leaking or just getting old.

Water Heater

Before you begin, check the wiring with a voltage tester to ensure it’s turned off. Make sure there’s sufficient access and space to work in the area where you plan to install your new water heater. Contact Water Heater Installation Denver for professional help.

The plumbing portion of a water heater installation involves connecting the hot and cold water lines to the new unit. Plumbers use threaded fittings, soldering tools, and pipe cutters to make the connections. They may also install an expansion tank if necessary to handle thermal water expansion and prevent excessive pressure. Plumbers often work with copper, but they can install plastic or galvanized steel pipes as well.

Plumbers also ensure that the new water heater has an adequate drain line and a gas or power vent. In addition, they might install a temperature and pressure relief valve on the discharge pipe, following the manufacturer’s instructions. Depending on where the heater is installed, building codes may require a special type of venting system to protect against fire or carbon monoxide poisoning.

If the new water heater will be located in a different location than the old one, the plumber will have to extend the existing gas and electrical lines. This can add to the overall cost of the installation.

Some plumbers have to remove and replace the existing piping, which can also increase the total cost of the project. If the location is in a hard-to-reach area, such as a corner of an attic, this can further increase labor costs.

In addition to installing the new piping, plumbers will also disconnect and drain the old water heater. They will then flush the drain pan to clear any sediment buildup and check for leaks. They will also check the voltage on the existing circuit breaker to ensure that it is correct for the new water heater.

During the installation process, the plumber will test the pilot light and make sure that it is functioning correctly. They will also inspect the gas line for leaks and safety issues, and they will connect the gas line to the new water heater if necessary. In some cases, the plumber may need to install a new gas shutoff valve or other safety devices. It is important to hire a professional to perform the water heater installation, as it involves working with gas and dangerous electrical wiring.


The water heater’s heating elements use electricity to convert propane gas into hot water. As such, the water heater needs to have a power source (usually a circuit breaker) that sends electricity to the elements.

If you want to avoid expensive repair and replacement costs, a professional installer should always wire your water heater properly. Using the proper voltage is important, as is making sure the wiring is safely secured to prevent tampering or accidental shorting out.

During water heater installation, you’ll also need to install the cold and hot water pipe assemblies. These must be soldered in place, and you’ll need to drain your water lines before installing the new water heater.

Once you’ve completed the plumbing, you’ll need to connect the electric cable and gas line. First, make sure the power is off by shutting off the breaker at the circuit box or water heater panel. Then, remove the cover plate from the electrical junction box on top of your water heater to expose the wiring. Use a voltmeter or circuit tester to ensure that the wiring is not live before you work on it.

If your new water heater is gas-fueled, you’ll need to connect the gas and vent pipes as well. This may require the services of a licensed plumber if you are replacing an existing gas line or connecting to a new one.

Before you start the installation, you should make sure that your local laws and building codes allow it. You may need to have a city inspector inspect the installation and approve it. The inspector will check whether the water heater is adequately strapped to prevent earthquake damage and that it’s located in a safe location with adequate clearance from flammable objects.

Having the right tools for the job is essential to get it done right. A quality tool kit can save you time, increase productivity and improve the results of your work. The best tools for water heater installation are precision, durable and versatile. They’re designed for a specific purpose and can help you take your work from good to great.


Venting is an important step in water heater installation. It helps to ensure that hot water and exhaust gas can escape, which keeps the water from overheating and the home safe. It also allows for proper ventilation of carbon monoxide, which is a colorless and odorless gas that can cause poisoning if too much is inhaled. A vent is a hole that lets air escape, like the one on your clothes dryer or a volcano venting lava. In your house, it’s often used for kitchen and bathroom appliances, such as stoves and sinks.

Before the installer can connect your new water heater to the incoming pipes, they need to properly vent it. This is done with a piping system that carries hot water and exhaust away from the heater. This is usually a stainless steel vent pipe, but it could be plastic or copper depending on your local building codes. Some areas require a certain type of venting, known as direct venting, which involves a special double-chambered pipe that allows the exhaust out while fresh air is pulled in. This is more complex than atmospheric venting and requires professional knowledge to install correctly.

If you’re using a traditional tank, you can attach a vent tube from the flange on the outside of the unit to a metal pipe running up through the side of your home. To do this, mark the location where you want the vent to go on the outside of your house. Use a ladder to reach the spot and bore a hole with a spade bit. Once you have the hole, remove siding and shingles around the vent area to expose the flange. Apply heat-resistant silicone sealant to the flange and insert it into the hole.

If you’re installing an on demand or high efficiency model, the process is different. It’s a good idea to use a plumber who has experience with these models, as they can help you choose the right size and model for your needs, and the plumbing may be more involved than with a standard tank. Moreover, the water heater must be properly strapped and braced to meet earthquake safety requirements here in California, which can add to the overall cost of the project.


Water heater installation requires a variety of materials to ensure code compliance and maximum efficiency. These include pipes, a discharge pipe, and the gas or electric supply line. You may also need a venting system for your new water heater, depending on whether you’re installing an electric or gas model. For gas models, the venting system must be installed to prevent fires and carbon monoxide poisoning.

The piping materials for the hot and cold water lines are either copper or galvanized steel. You can use flexible stainless steel connectors for these connections, or you can solder copper pipe using FIP (female inserted pipe) adapters. Most installers prefer to use flex connectors, which make it easier to disconnect the water heater for service or replacement.

These flexible tubes fit into the nipple fittings at the top of the water heater. If you’re using copper, make sure the nipple fittings have been removed from their flanges, and use Teflon tape to protect the threads before connecting them. If you’re using a cpvc water heater, use pvc pipe with fittings designed to be used with pvc. These are available at most home improvement centers.

If you’re replacing a gas water heater, replace the old draft hood with a new one that fits the collar on the top of the new water heater. Also replace the gas line from the heater to the gas control valve, and the gas line from the control valve to the new draft hood. You should also replace any vent pipe elbows that you’re removing from the old water heater, with new elbows that are properly angled to direct the gas line up and away from the water heater.

The temperature and pressure (T&P) relief valve on the water heater is usually installed at the factory, but you can install it yourself if you have access to a suitable drain pan and discharge pipe. Make sure that the relief valve is located close to the bottom of the tank, and that the discharge pipe is slopped for complete drainage. You may also want to add a sediment trap at the bottom of the discharge pipe. This will keep debris from entering the T&P valve, and it’s a good idea for all plumbing installations.