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The VIEGA 99640 is a 3/4 inch nominal press-end pipe adapter designed for use in PureFlow press-fit piping systems. This bronze adapter connects press-style tubing to threaded or standard pipe ends, allowing transitions within a piping assembly without soldering or open flame. It is installed by licensed plumbers and pipefitters working on residential and light commercial water distribution systems. The press-end connection style requires a compatible press tool for proper installation, delivering a reliable, leak-free joint when correctly crimped.
This adapter is suited for potable water supply lines, hydronic systems, and general plumbing distribution where a press-fit transition fitting is required. The 3/4 inch nominal size fits standard 3/4 inch press-fit tubing runs. Its bronze construction offers corrosion resistance appropriate for water service applications in both new construction and retrofit installations.
Designed for use with VIEGA PureFlow press-fit piping systems at 3/4 inch nominal pipe size. Specific compatible model numbers or system families beyond the PureFlow press product line were not provided in the available data.
Installation should be performed by a licensed plumber in accordance with local plumbing codes and IPC guidelines. Shut off the water supply and depressurize the line before fitting installation. A VIEGA-compatible press tool with the correct jaw size must be used to achieve a proper crimp on the press-end connection. Do not attempt to install press fittings by hand compression or with non-approved tooling, as this will result in an incomplete seal.
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