Resideo AM101R-US-1/U 3/4 in Union Sweat Mixing Valve R - Heat Only

The AM101R-US-1 is a thermostatic mixing valve from Resideo (Honeywell Home) for hydronic heating service, 3/4 inch, sweat connection.

A mixing valve solves a problem that has no other answer: a water heater has to be kept hot enough to suppress bacterial growth in the tank, and that temperature is too hot to deliver to a tap. The valve blends stored hot water with cold on its way out, so the tank stays hot and the fixture does not.

This is a heat-only valve. The R series is built for hydronic heating loops — radiant floor supply temperature, boiler protection, blending on a heating circuit. It is not for potable water service. Fitting a heat-only valve on domestic hot water puts a component outside its rating on the water people drink and bathe in. Check the model before ordering if the application is potable.

Union sweat ends solder to copper, with the union keeping the valve serviceable afterwards.

Set the outlet temperature with a thermometer at the fixture, not by the dial alone, and re-check it after the system has settled. Inlet conditions move the mix, and a valve set on a cold line reads differently once the loop is up to temperature.

• Brand: Resideo (Honeywell Home)
• Manufacturer Part #: AM101R-US-1/U
• Type: Heat-only mixing valve (not for potable water)
• Size: 3/4 in
• Connection: sweat
• Shipping weight: 2.0 lb
• Category: Mixing Valves

Questions about fit or compatibility? Ask our team. We usually reply within one business day.