Rheem Water Heater Booster Series

Water Heater Booster

The Rheem Water Heater Booster improves the overall performance and capacity of gas or electric tank water heaters.  The booster unit attaches to any tank or nearby wall.

Compatible with Electric or Gas Tank
The Rheem Water Heater Booster installs directly on the water line to provide more hot water than the tank alone can provide. The booster delivers nearly double the shower time. The unit senses the temperature of the water from the tank outlet, and activates when it senses that its inlet temperature has dropped below the user set activation temperature.

The Benefits of a Rheem Water Heater Booster
  • Increase hot water delivery up to 45%
  • Compact design
  • Dimensions:8-1/4" H x 12-5/8" W x 3-5/8" D
  • Digital user interface
  • Adjustable activation temperature 80-130°F
  • Adjustable outlet temperature 80 - 140°F
  • Set temperature in increments of 1°F
  • Easy installation on new or existing water heater
  • Field replaceable element
Additional wiring maybe required for a gas tank installation.

Model Number KW Volts Max Amps Water Connections Breaker
RTEX-AB7 7.2 240 30 3/4" NPT Fittings
1 X 30 AMP Double Pole

  • Delivers Up to 45% More Hot Water
  • Improves Gallon Capacity and Performance of Standard Tanks
  • Compatible With Both Gas and Electric Tanks


    Water Heater Booster
    Installation Guide - Rheem Water Heater Booster
    Rheem Water Heater Booster - Use & Care Manual
    Spec Sheet - Rheem Water Heater Booster
    Spec Sheet - Rheem Water Heater Booster (Canada)


    5 Year - Heating Chamber 

    1 Year - Parts 

    KwikComfort® Financing can help make your purchase even easier.
    Rheem makes it easy to find a financing option that works for you! With many options and benefits available, KwikComfort Financing is the best way to get the home comfort you need without the wait.

    • Applications made easyWe'll help you avoid lengthy contracts, headaches and hassles.
    • Kwik credit decisionsYou'll get an answer to your application within minutes.
    • Fast credit for the futureFinance your Rheem equipment and anything you want to add later.
    • Reduced interest/fixed paymentsGet low interest and fixed monthly payments until the purchase is paid.
    • Minimum monthly paymentTake advantage of convenient monthly payments that fit your budget.
    • Deferred interest/no interestEnjoy interest-free payments as long as the balance is paid by the due date.