Caleffi 521509A is a 3-way thermostatic mixing valve with 3/4" sweat connections, designed for point-of-distribution mixing in domestic water systems and radiant hydronic heating applications. Features adjustable setpoint (85–150°F), low-lead brass body, and 200 PSI maximum working pressure. Includes locking set point knob for safety.
Caleffi 521509A 3-Way Thermostatic Mixing Valve 3/4" Sweat
Caleffi
$176.95
In Stock
- SKU:
- 521509A
- Product Type:
- Thermostatic Mixing Valve
- Subcategory:
- 3-Way Mixing
- Application:
- Residential/Commercial
- System Type:
- Hydronic, Domestic Water
- Installation Type:
- OEM Replacement
- 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
- Lead-Free (NSF/ANSI 372):
- Yes