Are you waiting for hot water? Introducing the Autohot, an on-demand hot water recirculation pump that can be installed on any plumbing system to eliminate the wait for hot water. Here’s how it works:


Product selection

Determining the correct AutoHot® System for your home is simple. AutoHot® system is easily configurable to match any situation. Follow the steps below, and if you need help, don’t hesitate to contact us.

choose the right system in 3 simple steps


Determine Ideal Pump Size


Identify Install Location


Select Activation Options


Determine ideal pump size

The pump size will affect the speed at which the water moves through the pipes. The  larger the house or the more lineal feet of piping, the bigger the pump size you would want to be able to get hot water throughout the house quickly.
  • 55 Series Pump – Most common size, fits on most homes that are 2200sq ft or smaller, or if you have tankless water heater and less than 150 lineal feet between the heater and the furthest fixture
  • 99 Series Pump – For larger homes, or when you have a tankless system with more than 150 lineal feet of pipe between the heater and the furthest fixture.
  • 150 Series Pump – Oversized pump used for special applications, contact us for suitability.

identify install location

Are you installing your AutoHot® System on a return line or under the sink at the furthest fixture from the water heater? The install location determines whether you need the “Under Sink Kit (-USK).”
Use a system with “-USK” in the model number if:

  • You do not have a dedicated return line
  • Retrofitting a house without an existing circulator pump
  • You are installing at the end of a “dead-leg” branch line or riser
Do not choose a model number with “-USK” if:

  • If you have dedicated return line
  • You are not installing under a sink, but are installing by the water heater
  • You have an existing circulator pump


select activation options

Select the way in which you will activate the system when you want hot water delivered throughout the house. The AutoHot® System comes standard with one wired stainless steel button, but you may add additional activators and mix and match different activation styles to suit your needs.
  • Wired Decora Rocker Switch (White)
  • Wired Pushbutton (Chrome)
  • Wired Motion Sensor (Ceiling mount or wall recessed versions)
  • Wireless Push Button (Up to 1000 ft. range)
  • Wireless Motion Sensor (Up to 500 ft. range)

AutoHot® Residential On-Demand Recirculation Systems (Base Models)

Part No.ImageDescription
DR000AResidential AutoHot On-Demand hot water heat Pump ControlResidential AutoHot pump control, hard wired button, no pump included
DR055A55-Series pump AutoHot On-Demand tankless hot water heater55-Series pump AutoHot On-Demand tankless hot water heaterResidential AutoHot, 55-series pump, hard wired button activator (for dedicated return lines)
DR055A-USK55-Series pump AutoHot hot water Under Sink KitResidential AutoHot, 55-series pump, Under Sink Kit, hard wired button activator (for standard plumbing systems)
DR099A99-Series pump AutoHot On-Demand electric hot water heaterResidential AutoHot, 99-series pump, hard wired button activator (for dedicated return lines)
DR099A-USKon-demand autohot recirculating water systems for homes.Residential AutoHot, 99-series pump, Under Sink Kit, hard wired button activator (for standard plumbing systems)
DR150AResidential AutoHot, 150-series pump, hard wired button activator (for dedicated return lines)
DR150A-USKResidential AutoHot, 150-series pump, Under Sink Kit, hard wired button activator (for standard plumbing systems)

Accessories (for homes, order separately)

Part No.ImageDescription
WR-16AWireless receiver: For use with either wireless buttons, wireless motion sensors, or a combination of both. Up to 10 sensors per receiver
WB-S-16Ahome Wireless push Button for autohot recirculating systemWireless Button Activator: Works up to 1000 ft away in open air
WM-S-16Ahome Wireless motion Sensor for on-demand hot water systemWireless Motion Sensor Activator: Works up to 500 ft away in open air
HR-S-17WHardwired Decorative rocker switch whiteHardwired Activation Rocker Switch, White
HM-S-17AHardwired Motion Sensor
HB-S-13AHardwired push button activator for on demand recirculating pumpHardwired Push Button Activator (stainless steel)

Commercial / Multifamily Systems

Add Suffixes to the Base Models for Additional Options

-USKInclude undersink kit

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