The Caleffi 520615AC DL is a AngleMix thermostatic mixing valve with 1" PEX Expansion connections, listed to ASSE 1017 and rated 2.0 Cv. It is used for point of distribution temperature control in domestic hot water and hydronic systems.
Best for water heater and storage tank outlets where a single valve sets the distribution temperature for an entire building, zone or riser.
Specifications sourced from Caleffi NA technical literature, 2025 revisions.
Key Features
ASSE 1017 Listed
Certified for point-of-distribution service, controlling water heater outlet temperature for an entire building or zone.
Thermostatic Element Control
A wax-actuated element responds to outlet temperature changes and repositions the shuttle continuously, holding setpoint without power or controls.
Integral Check Valves
Inlet port check valves are built in, preventing crossflow between hot and cold supplies without additional fittings.
Integral Temperature Gauge
A built-in outlet gauge gives immediate visual confirmation of delivered temperature during commissioning and service.
Low-Lead Brass Construction
Wetted surfaces carry a weighted average lead content below 0.25%, meeting Section 1417 of the Safe Drinking Water Act.
Fast Mechanical Connection
PEX Expansion tailpieces cut installation time and remove open flame from the job site.
Technical Specifications
| Connection Size | 1" |
| Connection Type | PEX Expansion |
| Configuration | 3-Way |
| Flow Coefficient (Cv) | 2.0 |
| Maximum static operating pressure | 150 psi |
| Maximum dynamic operating pressure | 75 psi |
| Adjustment temperature range | 95 - 150 deg F |
| Maximum inlet temperature | 195 deg F |
| Flow rate working range | 0.5 - 9 gpm |
| Material | DZR low lead brass |
| Certification | ASSE 1017 |
| Series | AngleMix |
| Valve Technology | Thermostatic |
| Shipping Weight | 3.7 lb |
Documentation
Design Resources
Related Products
- Caleffi 520610A : AngleMix 3-Way Thermostatic Mixing Valve 1" Male NPT
- Caleffi 520610AC : AngleMix 3-Way Thermostatic Mixing Valve 1" Male NPT
- Caleffi 520614A : AngleMix 3-Way Thermostatic Mixing Valve 1" PEX Crimp
- Caleffi 520614AC : AngleMix 3-Way Thermostatic Mixing Valve 1" PEX Crimp
Frequently Asked Questions
Is Caleffi 520615AC DL approved for point-of-distribution service?
Yes. Caleffi 520615AC DL is listed to ASSE 1017, the standard covering temperature-actuated mixing valves used to control hot water distribution from a water heater or storage tank. ASSE 1017 valves regulate system supply temperature; they are not a substitute for ASSE 1070 point-of-use scald protection at individual fixtures.
What is the temperature adjustment range of Caleffi 520615AC DL?
The adjustment temperature range is 95 - 150 deg F. Maximum inlet temperature is 195 deg F. Confirm the setpoint against the applicable plumbing code for the installation.
What connection does Caleffi 520615AC DL use?
Caleffi 520615AC DL is supplied with 1" PEX Expansion connections. Other connection styles in the AngleMix family are listed under Related Products.
Does Caleffi 520615AC DL include check valves?
Yes. This model includes integral inlet port check valves, which prevent crossflow between the hot and cold supplies. The C in the product code identifies models supplied with integral check valves.
What is the warranty on Caleffi 520615AC DL?
Caleffi covers this product under its standard two-year limited warranty against defects in material and workmanship from the date of purchase. ZOT Supply is an authorized Caleffi distributor.
- Product Series:
- AngleMix
- Valve Technology:
- Thermostatic
- Application:
- Point of Distribution
- Connection Type:
- PEX Expansion
- Connection Size:
- 1 inch
- ASSE Listing:
- ASSE 1017
- Flow Coefficient:
- 2.0 Cv
- Integral Check Valves:
- Yes
- Temperature Gauge:
- Yes
- Adjustment Temperature Range:
- 95 - 150 deg F
- Body Material:
- DZR low lead brass