Viega 25721 1-1/2 in Press Pipe Union Carbon Steel

Product Description

The VIEGA 25721 is a 1-1/2 inch carbon steel pipe union designed for press-fit piping systems. It creates a disconnectable joint between two pipe sections without soldering, threading, or open flame. The press connection is made using a compatible pressing tool, producing a secure, leak-tested mechanical joint. This fitting is suited for hydronic heating, mechanical piping, and commercial plumbing applications where field disassembly may be required. Licensed plumbers and pipefitters are the primary installers in both new construction and retrofit work.

The VIEGA 25721 is used in closed-loop hydronic systems, chilled water piping, and general mechanical piping where a union connection is needed for serviceability. The press-fit design eliminates hot work permits in many jurisdictions, making it practical for occupied buildings and retrofit projects. It is compatible with standard carbon steel pipe in the 1-1/2 inch size range.

Key Features

• 1-1/2 inch press-fit connection on both ends
• Carbon steel construction for mechanical and hydronic piping service
• Union design allows disconnection of piping sections for maintenance or equipment removal
• No soldering, brazing, or threading required at installation
• Press connection completed with a compatible pressing tool for repeatable, inspectable joints

Compatibility

Designed as an OEM-style press-fit union for 1-1/2 inch carbon steel pipe systems using a compatible VIEGA MegaPress pressing tool and jaw set.

Installation Notes

Installation must be performed by a licensed plumber or pipefitter familiar with press-fit piping systems. Depressurize and drain the piping system fully before removing or installing a union fitting. Use only the pressing tool and jaw profile specified for this fitting size and series. Verify the sealing element is properly seated in the fitting before pressing and inspect each completed connection visually before returning the system to service.

Technical Specifications

• Pipe Size: 1-1/2 inches
• Connection Type: Press
• Material: Carbon Steel

Standard Information

• Brand: VIEGA
• Manufacturer Part Number: 25721