5 Tips for Installing an Under Sink Water Heater

Tankless water heater
  • 2 hours
  • Intermediate
  • 200-800

When installing an under sink water heater there are several things to keep in mind. An under sink water heater can be very handy for instant hot water. You will no longer have to waste water by letting it run until it's hot. Usually, they are very easy to install and do not require special tools or wiring. Just as long as you know a few hints and steps, you will be able to enjoy immediate hot water in no time.

1 - Prepare

One of the most important parts of any installation is the preparation. It is crucial you are able to get all of the necessary parts to prevent making extra trips to the hardware store or your tool shed. The more prepared you are, the easier this task will be. You are going to need a drill, some screws, and a quarter-inch female cap. That is, if you have a sprayer on your sink. Be sure you have the directions for your water heater handy so you will not have to look for it should you run into a problem.

2 - Remove All Necessary Components

tankless water heater

Once you have prepared all of your tools and the heater, make sure you have turned off the hot water side of your faucet. Be certain that you remove the spray fitting from the faucet and cap where you removed the hose. Once you have done all of this, it is time to install your water heater. This is where your directions are going to come in handy, as each one is differently installed.

3 - Evaluate Cabinet Strength

If you decide you want to install your water heater in a cabinet, be sure the cabinet is strong enough to hold your heater. Once you have installed your water heater, you will need to install the outlet hose to the spout. Remember you are not going to have hot water right away after installation. You will need to wait a few hours before it is ready.

4 - Remove Air and Debris

tankless water heater

Once you have completely filled the water heater, be sure that you run your faucet for a few minutes. This will get rid of any air bubbles in the tank. Also be sure that you do not ever, under any circumstances, plug in the water heater unless it is filled with water. This could cause a lot of damage to your heater, as well as your sink.

5 - Observe Local Ordinances

Be sure to check the local codes before you begin installation. It is important you know the minimum and maximum space that is allowed for your utilities. Also, do not be scared to call a professional. Sometimes it is the safest and smartest way to go. If you have no experience with installation on household objects it is sometimes best to call in some help. Should you do this, stand by and take notes on what they are doing and ask questions. This is the best way to learn how to do this for future reference.