Viega 316-UN-12 Propress Union 1/2 in 316 Stainless Steel

Product Description

The VIEGA 316-UN-12 is a 1/2-inch press x press union fitting manufactured from 316 stainless steel and built for the Viega ProPress system. It uses Smart Connect technology, which allows installers and inspectors to identify unpressed connections during pressure testing, reducing the risk of concealing an incomplete joint. This fitting is intended for use in plumbing and mechanical piping systems where a removable, in-line union connection is required. Installation is performed by licensed plumbers and pipefitters using Viega-compatible press tooling.

This union fitting is suited for residential and light commercial plumbing installations where stainless steel is specified for corrosion resistance. The press-style end connections eliminate open-flame soldering, making it appropriate for installations in occupied buildings or areas where hot work is restricted. The 316 stainless steel construction makes it a strong candidate for applications where water quality, chloride exposure, or system longevity are priorities.

Key Features

• Smart Connect technology enables detection of unpressed fittings during pressure testing
• 316 stainless steel construction provides superior corrosion resistance compared to 304 grade
• Press x press end connections eliminate the need for open-flame soldering
• Union configuration allows section removal or replacement without cutting pipe
• 1/2-inch size suits common residential and light commercial supply piping

Compatibility

Designed for use with the Viega ProPress stainless steel press fitting system with 1/2-inch press connections. Compatible fittings and tooling must be verified against the Viega ProPress system specifications for stainless steel applications.

Installation Notes

Installation must be performed by a licensed plumber or pipefitter using approved Viega ProPress tooling; improper tooling will result in an incomplete press joint. Shut off and depressurize the system before cutting into any existing piping. Conduct a pressure test after installation and verify all connections are fully pressed before closing walls or concealing the work. Follow all applicable local plumbing codes and ASME B16.18 or manufacturer guidelines for press-fit piping systems.

Technical Specifications

• Material: 316 Stainless Steel
• Connection Type: Press x Press (ProPress)
• Size: 1/2 inch x 1/2 inch
• Technology: Smart Connect
• UPC: 691514810058

Standard Information

• Brand: VIEGA
• Manufacturer Part Number: 316-UN-12