The Caleffi NA10313 is an adapter fitting with a 1/2 in male NPT connection and a 3/4 in straight-thread female nut. It adapts the 3/4 in male conical pipe connection on the Caleffi 301 series panel radiator valves to a 1/2 in male NPT threaded pipe connection.
Best for adapting the 3/4 in conical pipe connection on the Caleffi 301 series panel radiator valves to 1/2 in male NPT pipework.
Specifications from Caleffi datasheet 01036/23 NA, NA102/3 series fittings. Reviewed August 2026.
Key Features
NPT Connection
Provides a 1/2 in male NPT end on a valve that is otherwise supplied with a 3/4 in conical connection for Caleffi compression and PEX fittings.
3/4 in Straight-Thread Female Nut
Mates to the 3/4 in male conical pipe connection on the Caleffi 301 series panel radiator valves.
Alternative Connection Available
For a soldered connection instead, use the NA10262 with a 1/2 in sweat end.
Technical Specifications
| Product Type | Adapter Kit |
| Series | NA103 Series |
| Connection type | NPT |
| Pipe connection | 1/2 in male NPT |
| Valve connection | 3/4 in straight-thread female nut |
| Documented valve families | The Caleffi 301 series panel radiator valves |
Documentation
Related Products
- Caleffi NA10262 : Adapter Kit to 1/2" Sweat
- Caleffi 437516 : Compression Fitting 1/2" Copper
- Caleffi 681503A : PEX Fitting 3/8" Nominal
- Caleffi 387127 : Universal Radiator Tool
Frequently Asked Questions
What is the Caleffi NA10313?
An adapter fitting that converts the 3/4 in male conical pipe connection on the Caleffi 301 series panel radiator valves to a 1/2 in male NPT connection.
Which valves does the Caleffi NA10313 fit?
The Caleffi 301 series panel radiator valves. It uses the 3/4 in male conical pipe connection.
What is the difference between the NA10262 and the NA10313?
The NA10262 has a 1/2 in sweat end for a soldered connection. The NA10313 has a 1/2 in male NPT end for a threaded connection. Both share the same 3/4 in straight-thread female nut on the valve side.
- Product Type:
- Adapter Kit
- Product Family:
- Fittings and Accessories
- Series:
- NA103 Series
- Connection Type:
- NPT
- Connection Size:
- 1/2 in
- Fits Series:
- 301 Series
