Rheem Performance Water Heater Booster
MODEL RETEX-AB7
Limited Warranty – 5-Year Leaks,1-Year - Parts
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 available hot water by up to 60%
- Get 15 minutes or more of extra shower time
- Compact design
- Dimensions:8-1/4" H x 12-3/4" W x 3-3/4" D
- Digital user interface
- Control dial allows precise 1-degree temperature adjustment from 60 - 140°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 |
| RETEX-AB7 | 7.2 | 240 | 30 | 3/4" NPT Fittings | 1 X 30 AMP Double Pole |
Models
SKU RETEX-AB7
Warranty Years 5
Model Rheem Performance Water Heater Booster
Depth 3"
Height 8"
Width 12"
UEF 0.96
Kilowatts 7.2
Voltage 240
HIGH EFFICIENCY
- .96 UEF and advanced self-modulating technology only consumes the power needed to satisfy hot water demand
PERFORMANCE
- Control dial allows precise 1‑degreetemperature adjustment from 60°F to140°F (15°C to 60°C)
Flexible Installation
- Mounts on the tank’s hot water outlet or on a nearby wall to maximize space
- Compatible with both electric and gas water heaters
- Includes a 3 foot, 10 AWG wire for use with standard electric tank-type water heaters. Additional electrical work may be required for gas, smart electric, and heat pump water heaters
PLUS...
- LED home screen clearly displays the setpoint temperature on startup for easy setup and operation
- Easy to feed electrical wire entry port on the backplate provides an easy setup, creating less strain on the wire
- Metal 3/4" NPT water connections help maintain consistent water pressure and temperature reducing pressure drop issues
- Flow Meter menu monitors water flow(GPM) to help maintain a steady outlet temperature, provided demand does not exceed the heating capacity
- Load Factor menu monitors the inlet temperature, set point, and water flow to display the percentage of power the unit uses during operation
- Vacation/Away mode turns the water heater off and then automatically back on after the number of days selected
WARRANTY
- Limited Warranty – 5-Year Leaks,1-Year - Parts
Limited Warranty – 5-Year Leaks,1-Year - Parts






More Residential Rheem Products
Find additional documentation by viewing these related products.
Water Heater Booster
- Delivers Up to 45% More Hot Water
- Improves Gallon Capacity and Performance of Standard Tanks
- Compatible With Both Gas and Electric Tanks


