The Caleffi NA10709 is a union tailpiece with a 2 in press connection, in dzr low-lead brass for Caleffi LEGIOMIX mixing valves, providing the union joint that lets the host valve or separator be installed and removed without cutting pipe.
Product data compiled from Caleffi North America technical documentation. Last reviewed July 2026.
Key Features
Service Without Cutting Pipe
The union joint lets the host valve or separator drop out of the line for service or replacement - no torch, no pipe cutter.
Factory-Machined Sealing Face
Genuine Caleffi machining ensures the union face seals reliably against the matching nut and washer.
Fits LEGIOMIX
Matched to Caleffi LEGIOMIX equipment - confirm your model number before ordering.
Presscon Leak-Detection O-Ring
Special EPDM O-ring slots weep during an unpressed system test, then seal completely when pressed - unpressed joints reveal themselves before insulation goes on.
Standard Press Tools, 200 psi
Presses with standard compression jaws; rated 200 psi, 0 - 250 F, up to 50% glycol.
Low-Lead DZR Brass
Dezincification-resistant low-lead brass, suitable for potable water connections.
Technical Data
| Function | Tailpiece |
|---|---|
| For product line | PresCal |
| Fits | Caleffi LEGIOMIX series |
| Description | 2 in Press Tailpiece Assembly for LEGIOMIX |
| Connection type | Press |
| Connection size | 2 in |
| Material | DZR Low-Lead Brass |
| Press system | Caleffi Presscon, standard press compression tools |
| Press rating | 200 psi; 0 - 250 F; up to 50% glycol |
| Insertion depth | 7/8 in (mark tube before pressing) |
| Lead-law compliance | Meets U.S. and Canadian low-lead requirements |
Documentation
Presscon Series BrochureRelated Products
Frequently Asked Questions
It is the genuine fitting for Caleffi LEGIOMIX series equipment. Match your host model number and connection size before ordering.
It creates a break point in the piping so the valve or separator can be removed for service without cutting pipe or unsoldering joints.
Yes - DZR low-lead brass suitable for potable water systems.
Standard press compression tools and jaws - see the Presscon installation guide; insert the tube fully to the 7/8 in depth and mark before pressing.
The EPDM O-ring has special slots that let fluid weep past an unpressed joint during system testing, so a missed press shows up immediately; once pressed, the joint seals completely.
- Type:
- Tailpiece
- For Product Line:
- PresCal
- Connection Type:
- Press
- Connection Size:
- 2 in
- Material:
- DZR Low-Lead Brass