Tricks of the Trade

How to install a water heater tank booster

Dave Hinshaw, a Ferguson author

by David Hinshaw


Water heater tank boosters provide a number of benefits for professional plumbers and their customers alike. Installing a tank booster on an existing tank type water heater is an easy way to optimize a unit’s energy efficiency by increasing the tank’s capacity by up to 150% depending on the type of water heater. This can help you boost your business because your customers will appreciate the savings reflected in their monthly energy bills. Another advantage of tank boosters that you will appreciate as a plumber is their relative ease of installation. Read the steps below to gain a fundamental understanding of how simple it can be to add this accessory to a water heater.*

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Tank booster installation overview

  1. Prepare the water heater for tank booster installation. Shut off the water supply, drain the pipes and prep the supply lines. Check the water heater manufacturer specifications to properly turn on and off the water heater unit.

  2. Attach the cold water supply valve to the cold water inlet and the hot water supply valve to the hot water outlet.

  3. Install the appropriate connector to allow cold water to flow to the hot water mixing valve.

  4. Reconnect all of the supply lines to the water heater according to manufacturer specifications.

  5. When all of the water heater components are properly reconnected, turn the water back on and allow the tank to fill up. Then set the water heater temperature to 140 F and the tank booster thermostat to the desired temperature.

Find everything you need to install a tank booster and tackle all of your service calls from Ferguson. We are your one-stop water heater shop. Browse water heater parts & accessories online and visit your local Ferguson for all of your water heater needs.

*Please note that installation requirements vary from brand to brand and from water heater to water heater. This information is not comprehensive to the installation process, which is recommended to be performed by qualified plumbing professionals only.

Dave Hinshaw, a Ferguson author
David Hinshaw

With over 38 years of experience in the plumbing supply industry, David offers his wealth of product knowledge to trade professionals in order to help them better serve their customers.