The Caleffi R31706 is a thread adapter with a 1-1/4 in connection.
Product data compiled from Caleffi North America technical documentation. Last reviewed July 2026.
FunctionAdapter
Connection1-1/4 in
Warranty2 Years
Key Features
Thread Transition
Joins the two thread standards/sizes in its name in a single genuine Caleffi fitting.
Genuine Caleffi Part
Factory fitting with correct dimensions and sealing geometry.
Technical Data
| Function | Adapter |
|---|---|
| Description | Fitting 1-1/4 in x 1 in |
| Connection size | 1-1/4 in, 1 in |
Related Products
Caleffi NA101191-1/4 in AdapterCaleffi 61215A1 in AdapterCaleffi NA100621 in AdapterCaleffi NA100641 in Adapter
Frequently Asked Questions
What does the Caleffi R31706 fit?
It is the genuine fitting for the matching Caleffi threaded assembly. Match your host model number and connection size before ordering.
2-Year Limited Warranty. Backed by Caleffi North America's limited warranty against defects in material and workmanship for two years from date of shipment. See Caleffi's limited warranty for full terms.
- Type:
- Adapter
- Connection Size:
- 1-1/4 in
- Connection Size:
- 1 in