Search the catalog

Search the catalog

Related products

Building Supplies

Gutter Systems
Roofing
Ventilation
Siding
Concrete, Cement & Masonry
Ceilings
Drywall

Plumbing

Plumbing Tools
Plumbing Parts
Pipe & Fittings
Water Pumps
Valves
Plumbing Accessories
Drainage

Lighting & Electrical

Wiring Devices & Light Controls
Batteries
Electrical Boxes, Conduit & Fittings
Power Distribution
Wire
Wall Plates
Electrical Cords

Shop by Brand

Milwaukee
STIHL
DeWalt
YETI
Diablo
National Hardware
Rust-Oleum

© 2026 Core Ranger, Inc.

Caleffi 3-Way Thermostatic Mixing Valve… | Core Ranger

Home
Heating, Venting & Cooling
HVAC Supplies
HVAC Accessories

SKU 521516A

Caleffi 3-Way Thermostatic Mixing Valve Temperature Gauge Adjustable 3/4 Press" Mixcal 521516A

$337.77$33777

The Caleffi 521516A is a 3/4-inch press connection 3-way thermostatic mixing valve with an adjustable temperature gauge, designed to blend hot and cold water for consistent outlet temperature in HVAC systems.

Specifications

Model #: 521516A
Pack Size: 1
Internet #: 700045997
Returnable: 90-Day
Store SKU #: 1015882542
HVAC Product Type: Mixing Valve
Product Depth: 6 in
Product Width: 5 in
Product Height: 2.25 in
Product Weight: 2.6 lb
Manufacturer Warranty: 90 day parts warranty.
Brand/Model Compatibility: Caleffi

Related products

Related products

Caleffi Automatic Air Vent Minical 1/8" Outside Npt 502015A

Caleffi

Caleffi Automatic Air Vent Minical 1/8" Outside Npt 502015A$23.33^$23³³

Caleffi 3-Way Thermostatic Mixing Valve Temperature Gauge Adjustable 1" Press Mixcal 521616A

Caleffi

Caleffi 3-Way Thermostatic Mixing Valve Temperature Gauge Adjustable 1" Press Mixcal 521616A$397.77^$397⁷⁷

Caleffi Automatic Filling Valve Backflow Prevention Pre-Set 1/2" Press Union Inlet X 1/2" Internal Npt Outlet 573006A

Caleffi

Caleffi Automatic Filling Valve Backflow Prevention Pre-Set 1/2" Press Union Inlet X 1/2" Internal Npt Outlet 573006A$314.43^$314⁴³

Caleffi 3-Way Thermostatic Mixing Valve Temperature Gauge & Inlet Checks Adjustable 3/4 Press" Mixcal 521516AC

Caleffi

Caleffi 3-Way Thermostatic Mixing Valve Temperature Gauge & Inlet Checks Adjustable 3/4 Press" Mixcal 521516AC$403.32^$403³²

Caleffi 3-Way Thermostatic Mixing Valve Temperature Gauge & Inlet Checks Adjustable 3/4" Sweat Mixcal 521519AC

Caleffi

Caleffi 3-Way Thermostatic Mixing Valve Temperature Gauge & Inlet Checks Adjustable 3/4" Sweat Mixcal 521519AC$363.32^$363³²

Caleffi Air Separator 1-1/4" Internal NPT Max Temperature 250F Max Pressure 150PSI Discal 551007A

Caleffi

Caleffi Air Separator 1-1/4" Internal NPT Max Temperature 250F Max Pressure 150PSI Discal 551007A$358.88^$358⁸⁸

Caleffi Air Separator 1-1/4" Press Sweat Max Temperature 250F Max Pressure 150PSI Discal 551035A

Caleffi

Caleffi Air Separator 1-1/4" Press Sweat Max Temperature 250F Max Pressure 150PSI Discal 551035A$339.98^$339⁹⁸

Caleffi Automatic Air Vent Minical 1/2" Outside Npt 502040A

Caleffi

Caleffi Automatic Air Vent Minical 1/2" Outside Npt 502040A$23.33^$23³³

Caleffi Automatic Filling Valve Pressure Gauge & Backflow Preventer Pre-Set 1/2" Inside Npt Union Inlet X 573016A

Caleffi

Caleffi Automatic Filling Valve Pressure Gauge & Backflow Preventer Pre-Set 1/2" Inside Npt Union Inlet X 573016A$339.98^$339⁹⁸

Caleffi Pressure Reducing Valve Gauge Adjustable-Preset 45PSI 1" Press Union 19Gpm Max Prescal 535661HA

Caleffi

Caleffi Pressure Reducing Valve Gauge Adjustable-Preset 45PSI 1" Press Union 19Gpm Max Prescal 535661HA$264.43^$264⁴³

Caleffi Pressure Reducing Valve Gauge Adjustable-Preset 45PSI 1" Fnpt Union 19Gpm Max Flow Prescal 535361Ha

Caleffi

Caleffi Pressure Reducing Valve Gauge Adjustable-Preset 45PSI 1" Fnpt Union 19Gpm Max Flow Prescal 535361Ha$243.33^$243³³

Caleffi Automatic Air Vent 1/8" Outside Npt Robocal 502610A

Caleffi

Caleffi Automatic Air Vent 1/8" Outside Npt Robocal 502610A$20.78^$20⁷⁸