The Problem: Show The Benefits of a Hot Water Recirculation System: Aquamotion Pump Selection Chart:
In Stock, Ships Next Business Day The AquaMotion AMH3K-7N is designed to deliver hot water quickly at all points of use between the hot water tank and the farthest fixture that this pump is installed under. ON-DEMAND gives the homeowner the ability to manually activate the system through a wireless controller. It does not include a timer. The Aquastat is a temperature sensor that will tell the pump to run when the water at the fixture starts to drop below 85°F. It will run until it reaches 105°F and then it will shut off. ON-DEMAND is preferred over pumps with timers when you are trying to save money on electricity. AquaMotion offers three different controller types and the option to add an additional control for their ON-DEMAND pumps. A controller kit (includes controller and receiver) is required for the AMH3K-7N. Aquamotion offers several different controller kits as well as the option to add up to 4 additional controllers for their ON-DEMAND pumps. Additional controller options include a wireless button (AMK-WBR), a wireless wall switch (AMK-WSR) and a motion sensor (AMK-MSR). Also available is the smart plug (AMK-SM). The SmartPlug works with your phone and does not require a receiver. It cannot be used in conjunction with controller kits mentioned above. It is for use with a standard hot water heater for common 2 pipe plumbing systems. The AMH3K-7N creates a loop from the water heater to the faucet and back again. The unused hot water is drawn back through this loop by the pump, so when you turn on your hot water faucets, you get hot water quickly. Water is not left in the pipes to get cold, and you waste less water because you don’t have to wait. Water savings can be as great as 12,000 – 15,000 gallons per year with 4-5 taps in a home. As many homeowners know, you can turn on the faucet and wait for the water to heat up for a very long time - sometimes more than 2 or 3 minutes. That waiting time is wasting energy and countless gallons of water! All of the moving parts of the AquaMotion AMH3K-7 recirculator are housed in a "Green Eco Cartridge Design". It is the only field serviceable and replaceable cartridge available. With this design, simply remove the rotor assembly, flush the cartridge with water and reinstall it. Simple, cost-effective, patented technology! Requirements for using the AMH3K-7N include a min./max. water pressure of 20 PSI / 125 PSI with a maximum water temperature of 176°F. The AMH3K-7N includes the following:
Here is a quick reference to confirm that the AMH3K-7N hot water recirculator will work for your needs:
If you are looking for the same pump but with a timer and the ability to run continuously, take a look at the AquaMotion AMH3K-7. AquaMotion - Designed, Built, and Tested in the US. AquaMotion pumps are covered by a 3-year limited warranty. Please email us at and we will work with you to troubleshoot any problems you may have with your AquaMotion Pump.
Can you use a recirculating pump with a tankless water heater?Some tankless water heater models come with a recirculation pump, while others do not, mostly to reduce the cost of tankless water heaters for consumers. While they will work without one, purchasing a tankless water heater with an integrated recirculation pump is always recommended first.
Where do you put a recirculating pump on a tankless water heater?Cold Water Line: If you install the circulation pump and Flow Monitor in the cold water line it must be located on the pipe that is the sole supply of water for the tankless heater. If it supplies water to any other fixture it may lead to false activation of the pumping system.
Can you add recirculating pump to a water heater?INSTALL THE PUMP
With an adjustable wrench, disconnect the hot water discharge line coming out of your water heater. Insert a gasket into the female fitting on the recirculating pump and screw it onto the threads of the water heater discharge outlet. Use Teflon tape and tighten with a wrench.
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