Rheem's under the sink, on-demand recirculating pump kit provides instantaneous hot water where you want it and when you need it. As a bonus, this kit helps save up to 12,000 Gal. of water per year by reducing the amount of water running down the drain while waiting for hot water. This under the sink option is a perfect solution for adding instant hot water to an existing water piping application. Application - This model is perfect for retrofits and new construction. Engineered for use with all Rheem Tankless and Tank Type water heaters.
Install location - the pump unit installs under the sink cabinet of the fixture furthest from your water heater
Activation - wired push button included
Plumbing requirements - uses existing cold water supply pipe as the return line - no dedicated return line required
Compatibility - tank-type and tankless water heaters
Kit includes - pump, wired push button, 2 tee fittings, 2 corrugated flex tubes, piping diagrams and instructions
Maximum pipe length with 3/4 in. pipe is 400 ft.
Maximum pipe length with 1/2 in. pipe is 100 ft.
Motion sensor or remote transmitter activation kits sold separately
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Product Depth (in.)
Product Height (in.)
Product Width (in.)
Select Rheem Gas Tankless water heaters
For Use With
Product Weight (lb.)
Warranty / Certifications
3 Year Limited
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out of 48 reviews
82%recommend this product
Showing 1-10 of 48 reviews
Dec 11, 2019
I installed this in our master bathroom vanity sink area. Before I had this, it would take severa...
I installed this in our master bathroom vanity sink area. Before I had this, it would take several minutes running the water before the hot water would arrive at the shower, wasting a lot of water. Now, I push the button, and after a few minutes, the pump stops and the water arrives in the master shower within 5-6 seconds. I created a YouTube video after installing it if you want to see the results. This is a super high quality, easy install for DIU homeowner with basic skills.
17 found this review helpful
May 12, 2022
Our kitchen and water heater are in opposite sides of...
Our kitchen and water heater are in opposite sides of the house. We can run the faucet for 3 minutes or use a pump. The old one broke after 25 years and this one from Rheem was half the price. Works just like the old one. Tip - rather than use the included doorbell button you can use a garbage disposal “air switch” with an electrical contact to start the pump.
Apr 6, 2022
The two T back flow pipes and one of the...
The two T back flow pipes and one of the flexible pipes is missing from the kit.
Feb 8, 2022
This is a great unit and gets the hot water...
This is a great unit and gets the hot water to the bathroom tap a long way from the hot water heater
Jan 25, 2022
Connections are upstream from sink shut-off valves
Thus if it ever needs service both the hot and cold water supplies will have to be shut off elsewhere. In some/many cases that means shutting off hot and cold water for the entire house. (I did not buy one but the review tool requires entering ratings.)
1 found this review helpful
Dec 29, 2021
Brilliant, water and energy saving device
This hot water recirculating pump is a must have if your bathroom sink(s) and shower are far from the waterheater. Before installing this, it took almost 6 quarts of running water for the warm water to reach the bathroom faucet - now it's right there. Push button control brings the warm water on demand so it saves water and energy; easy to install, and easy to daisy-chain the push button start to another bathroom. Every house should have one of these!
Dec 29, 2021
Works beautifully! Conserving water while waiting for a brief moment...
Works beautifully! Conserving water while waiting for a brief moment for the hot water.
Dec 17, 2021
Pump work as advertise only reason gave it 4 stars...
Pump work as advertise only reason gave it 4 stars is the quality of the connector hoses. Bought better ones but otherwise great easy to install.
Aug 28, 2021
Working well, saves gallons of water!...
Working well, saves gallons of water!
Aug 14, 2021
NOT a DIY installation!...
NOT a DIY installation!
Response from RheemSep 28, 2021
Please call Technical Support at 866-279-4566 between the hours of 7 A.M. and 7 P.M. CST and one of our experienced analysts will be happy to assist you with any installation questions you may have.