Instruction Sheet
5123-WH-N Lead Free (≤ .25% Pb) Mixing Valve
102-492
SUPERSEDES: July 2, 2015
EFFECTIVE: August 18, 2015
Plant I.D. 001-4206
WARNING: Water temperatures above 120°F can cause serious injury. Mixing valve temperature setting should
be done by a licensed professional per local code requirements. Use an accurate water thermometer and ver-
ify the final water temperature. The thermostatic strip provided must not be used for final water temperature
verification.
WARNING: The 5123-WH-N must not be installed on steam systems (water systems only).
WARNING: 5123-WH-N mixing valves are not designed to compensate for system pressure fluctuations
beyond the valves variation rating and should not be used where more sophisticated pressure compensating
temperature controls are required. These mixing valves are not intended to provide protection against
thermal shock.
CAUTION: Valve must not be subjected to heat during the installation, this may damage the valve’s internal
components.
CAUTION: Do not use excess thread sealant (in any form) as this may cause valve failure.
GENERAL:
The Taco 5123-WH-N is dual listed for both ASSE 1070 and ASSE 1017 applications.
• All installations should be carried out by a Licensed Professional. Failure to comply with all aspects of these instruc-
tions may result in unsafe performance. All installations must comply with relevant State and Local codes or authori-
ties.
• Ensure compatibility of valve installation, e.g. temperature of hot water, inlet pressure, flow rates, etc. -
refer to specification section. If the site conditions are outside of the specifications for the valve, the site
conditions must be corrected prior to installing the valve.
• Install in accordance with markings on valve body, i.e. hot water inlet - marked “H”, cold water inlet -
marked “C” and mixed outlet - marked “M”.
• Any inconsistency between these instructions and any specific instructions, bylaws or codes issued by
local authorities must be referred back to Taco, Inc. prior to any installation taking place.
• During startup ensure that the valve is set to the desired temperature (valve preset at 115-120°F (46-
49°C) with 150°F (66°C) hot water inlet temperature). If the valve temperature needs to be adjusted please
refer to the instructions below (
MIXING VALVE TEMPERATURE ADJUSTMENT
).
• A temperature strip is provided with each mixing valve and can be used as a reference to set the temper-
ature. The temperature strip must not be used for final temperature verification.
NOTE: If the water supply is of poor quality a filter or strainer should be fitted at the system inlet so
that both the water heater and the mixing valve are protected from dirt and debris.
