Viega 20819 Pipe Adapter 2.5 in Press X Fnpt Copper

Product Description

The VIEGA 20819 is a 2.5-inch nominal pipe adapter designed for transitioning between press-style copper connections and female NPT threaded fittings. It is part of the ProPress XL-C product line, built for use in commercial and industrial piping systems where fast, flame-free installation is required. The adapter connects a press end to an FNPT end, allowing installers to tie into threaded equipment, valves, or headers without soldering. Constructed from copper, it delivers reliable corrosion resistance in potable water, hydronic heating, and mechanical piping applications. Licensed plumbers and pipefitters are the primary installers of this fitting.

This adapter is suited for commercial plumbing and mechanical systems that require a direct transition from a press-style copper main line to a threaded female connection point. Typical applications include equipment hookups, pump connections, and manifold tie-ins where threaded ports are standard. The 2.5-inch nominal size makes it appropriate for larger-diameter distribution lines commonly found in commercial buildings, hotels, and institutional facilities. It is intended for use with compatible press tooling approved for the ProPress XL-C system.

Key Features

• 2.5-inch nominal size for larger commercial and mechanical piping runs
• Press x FNPT end style enables flame-free connection to threaded equipment
• Copper construction provides corrosion resistance in water and hydronic systems
• Eliminates soldering at the press end, reducing labor time and open-flame risk
• Part of the ProPress XL-C fitting system for consistent, tool-driven joints

Compatibility

Designed as an OEM-style fitting for use within the ProPress XL-C press-fit copper piping system, compatible with standard 2.5-inch press tooling and female NPT threaded connections.

Installation Notes

Installation requires a calibrated press tool approved for ProPress XL-C fittings at the 2.5-inch size — verify jaw and ring selection before pressing. Shut off and depressurize the water or hydronic system fully before making any connections. The FNPT end must be assembled with an appropriate thread sealant or tape in accordance with local plumbing codes. Work must be performed by a licensed plumber where required by local jurisdiction.

Technical Specifications

• Nominal Size: 2.5 inches
• End Style: Press x FNPT
• Material: Copper
• Product Line: ProPress XL-C

Standard Information

• Brand: VIEGA
• Manufacturer Part Number: 20819