Hot Water Boiler Installation Hot Water Boiler Installation

What You'll Need
New hot water boiler with fittings
Black threaded pipe
Copper pipe
Pipe bending tool
Sheet metal pipe
Sheet metal screws
Safety glasses

A new hot water boiler will be far more efficient than an old one. The best boilers are 80 percent efficient. This means that for every dollar you spend on fuel, 80 cents will go to heat. While this isn’t perfect, it’s much better than older models where the efficiency was lower. Installing a new hot water boiler is a big job that you won’t complete in an hour or two. You should probably only undertake it if you feel comfortable working with plumbing, pipes and gas.

Step 1 - Prepare

Your hot water boiler needs to be on a stable, level surface, with gas, water and electrical lines all close by. Unpack the new hot water boiler from its carton and use a level as a guide to making sure it sits straight in all directions on the installation surface, which will usually be a basement floor. Make sure the gas and water to the house are turned off.

Step 2 - Dress the Hot Water Boiler

To dress the boiler, you need to add the pipes that send out heat. Depending on the size of your home, you will have several “zones” available. Each of these will require their own connection off the same outlet pipe from the boiler. Using a wrench, attach the outlet pipe and add a new connection for each zone. Connect from your existing pipes to each zone outlet from the main outlet pipe. You will need threaded pipe for this so you can tighten the pipes with a wrench on the nut connectors.

Step 3 - Add the Feed and Return Pipes

You will now need to add the feed and return pipes for the water. These will be the copper piping from the main water pipe. To attach them, you’ll need to use a blowtorch. Unless you’re familiar with the technique, use a professional to carry out this part of the job for you. Always wear safety glasses when you use a blowtorch. If you need to bend the copper piping, use a pipe bending tool to ensure the curve is smooth with no crimps along its length.

At the same time, you will need to connect the boiler to the water tank. You will also complete this task with copper tubing and a blowtorch.

Step 4 - Add the Flue

Your boiler will need to be vented. The standard smoke pipe should be located close to the boiler. You should attach it directly to the boiler. Add extra pipe with elbows, if necessary, to create a safe connection. Secure it with sheet metal screws until the pipe is in place.

Step 5 - Connect the Gas to the Hot Water Boiler

The final step in the installation is to connect the gas line that runs to the house to the boiler. Before doing this, check your local plumbing codes to ensure you’re in compliance. In most states, you’ll be able to use a black threaded pipe from the gas to the new hot water boiler.

Step 6 - Fire Up the Hot Water Boiler

Once all of the connections are secure, turn on the water at the mains and allow the hot water boiler to fill. The automatic feed valve will fill the unit to the correct pressure, which is generally 22 PSI. To start the boiler, you should use a professional who knows how to adjust the carbon dioxide output and check all the flue venting.

Important Note

Legislation in some countries and states demands that all gas appliances and fittings are installed by qualified professionals. You may also find that some areas will request that a professional inspects your work and signs it off before usage can begin. Check your local laws before beginning self-installation.

Got a New Project You're Proud of?

Post it on Your Projects!