The MX127LF is a lead-free thermostatic mixing valve from Resideo (Honeywell Home), 1 inch, NPT 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.
Beyond safety, tempering buys capacity. A tank held hot and blended down delivers considerably more usable hot water than the same tank set to delivery temperature, because each gallon drawn is stretched with cold.
Lead free construction, as required for potable water in the United States.
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.
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Brand: Resideo (Honeywell Home)
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Manufacturer Part #: MX127LF/U
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Type: Thermostatic mixing valve
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Size: 1 in
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Connection: NPT
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Lead free: Yes
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UPC: 085267182782
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Shipping weight: 4.4 lb
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Category: Mixing Valves
Full Specifications
| Controlled Media |
Potable Water, Non Potable Water |
| Re-Circulation |
Yes |
| Approvals and Standards |
ASSE 1017 Certified, CSA Listed, NSF/ANSI 61 Certified |
| Color |
Metallic |
| Includes |
(3) 1 in Gaskets, 1/2 in BSP recirculation adapter, Check Valves on Hot and Cold Inlets |
| Product Length |
6.5 in, 165 mm |
| Product Weight |
3.6 lb, 1.6 kg |
| Warranty |
1 Year |
| Adjustment Means |
Allen Key |
| Differential Pressure (Max) |
7 psi, 48.3 kPa |
| Flex Connector Included |
No |
| Flow Coefficient |
4 Cv |
| Flow Rate (Min) |
1 gpm, 3.78 lpm |
| Lead Free |
Yes |
| Media Temperature (Max) |
221 °F, 105 °C |
| Number of Check Valves |
2 |
| Operating Mixing Temperature (Min) |
113 °F, 45 °C |
| Operating Mixing Temperature (Max) |
149 °F, 65 °C |
| Operating Pressure (Max) |
150 psi, 1034 kPa |
| Seal Material |
Gun Metal |
| Valve Body Material |
Teflon-coated, Bronze |
| Accessories |
MX 050-RP/U |
| Connection Size |
1 in |
| Connection Type |
NPT |
| Nominal Diameter |
DN25 |
| Number of Connections |
4 |
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