The Caleffi 59817A is a union nut and tailpiece kit with a 1 in NPT connection, in dzr low-lead brass for Caleffi small union valves products, 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.
Low-Lead DZR Brass
Dezincification-resistant low-lead brass, suitable for potable water connections.
Technical Data
| Function | Nut & Tailpiece Kit |
|---|---|
| For product line | Small Union Valves |
| Description | 1 in MNPT Tailpiece w/ Nut |
| Connection type | NPT Threaded |
| Connection size | 1 in |
| Material | DZR Low-Lead Brass |
Related Products
Frequently Asked Questions
It is the genuine fitting for Caleffi Small Union Valves products. 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.
- Type:
- Nut & Tailpiece Kit
- For Product Line:
- Small Union Valves
- Connection Type:
- NPT Threaded
- Connection Size:
- 1 in
- Material:
- DZR Low-Lead Brass