Skip to main content
Most in-stock orders ship same or next business day · 16,700+ parts from 100+ brands Email quotes@globalpartsupply.com

Caleffi 521519AC 3/4" Sweat Thermostatic Mixing Valve w/ Checks

Caleffi

$219.95

In Stock — 10+ available

Write a Review
SKU:
521519AC
Adding to cart… The item has been added

30-day returns on most unused, uninstalled parts Secure checkout with cards, PayPal or Google Pay Questions? quotes@globalpartsupply.com

Flat-rate shipping. The same price to anywhere in the 50 states.

Ships same or next business day · UPS Ground or comparable carrier, typically 1–5 business days.

Specifications

Product Type:
Thermostatic Mixing Valve
Subcategory:
Point-of-Distribution Mixing Valve
Application:
Residential/Commercial
System Type:
Hydronic Heating, Domestic Water, Radiant Floor
Installation Type:
OEM Replacement
Temperature Range:
32°F to 200°F (inlet max)
Setpoint Range:
85–150°F
Pressure Rating:
200 PSI
Inlet Size:
3/4" Sweat
Connection Type:
Sweat/Solder
Connection / Joint:
Sweat/Solder
Material:
Low-Lead Brass
Control Type:
Non-Programmable
Lead-Free (NSF/ANSI 372):
Yes
Caleffi MixCal™ 521519AC is a 3/4" sweat thermostatic mixing valve with integral check valves, designed for domestic water and radiant hydronic heating systems. Low-lead brass body maintains setpoint temperature (85–150°F) within ±3°F despite inlet temperature and pressure variations. Includes temperature gauge, tamper-proof adjustment lock, and anti-scale polymer internals. Max working pressure 200 PSI; min flow 1.0 GPM.