CALEFFI TankMixer 520 Series Installation Instructions Manual

TankMixer™ and TankMixer™ Compact thermostatic mixing valve kit
© Copyright 2025 Caleffi
ASSE 1017
NSF/ANSI/CAN 372
The TankMixer thermostatic mixing valve kits have been certified to ASSE 1017, CSA B125.3 and
US and Canadian plumbing codes. The products also meet NSF/ANSI/CAN 372 for low lead and
lead free materials requirements for products in drinking water systems. Certified and listed by
ICC-ES.
Product range
TankMixer
52050_AX series kit:
Adjustable 3-way thermostatic mixing valve kit, with flexible pipe..................................
52051_AX series kit: 52050_AX series kit with mixed outlet temperature gauge.
TankMixer Compact
52051_AP series kit:
Adjustable 3-way thermostatic mixing valve kit, with pivot connectors...........................
All kits contain angle mixing valve body with cold water cross and ¾" NPT female connection to
water heater.
Function
The Caleffi TankMixer™ maintains the desired output temperature of
the mixed water supplied at a constant setpoint compensating for
both temperature and pressure fluctuations of the incoming hot and
colder water. The TankMixer allows the water heater thermostat to
be set higher than the mixing valve setting, increasing the effective
capacity of the heater.
The TankMixer series combines the high-performing AngleMix three-
way point of distribution thermostatic mixing valve with a cold water
supply cross, which contains an integral check valve for the flow to
the mixing valve and ½" NPT female threaded recirculation tap, that
can plugged if not used. The AngleMix angle style mixing valve body
design offers improved fluid dynamics for better performance and
reduces installation labor and materials, eliminating a piping elbow
in typical installations. The AngleMix also features a thermal shut-off
function that operates in the event of a cold water supply failure at
the inlet.
The TankMixer features a flexible pipe for easy installation directly on
a typical gas-fired water heater and other water heaters that have a
flue or fan-powered exhaust in between the cold inlet and hot outlet
pipe nipples.
The TankMixer Compact provides two pivoting brass connectors for
easy installation directly on typical electric water heaters and heat
pump water heaters. It has unique ¾" pivot connectors that adapt to
heater nipples spaced from 3" to 8" on-center.
union system connections ¾" sweat, press, and NPT male
union system connections ¾" sweat, press, and NPT male
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NA10482.05
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520 Series