Honeywell AM-1 Thermostatic Mixing Valves. ( water heater tempering )

Honeywell AM-1 Series Thermostatic Mixing Valves. ( water heater tempering )
Many plumbing codes require a tempering valve to prevent scalding if you have a tub that people bath in. A tempering valve takes the cold water and mixes it with hot water and dials it down to a suitable temperature.
Some adjust between 70 F and 120 F
And you can also get one that does 70 F to 145 F

Raising the water in the tank to 140 F helps to prevent the growth of Legionella bacteria.



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• Allows homeowners to store water at 140 F and
higher to prevent legionella growth, but receive
safe, comfortable 120 F water at sinks, shower
or tub
• Designed to increase the amount of usable hot
water by up to 50 percent

 

Installing the AM-1







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Honeywell AMX300 Tempering Valve Kit for water heaters



Installed on a gas water heater.

 

Here is a smaller unit located in the bathroom, under a lav cabinet for the garden tub.