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The VIEGA 79315 is a 3/4 inch nominal pipe adapter designed for transitioning between press-fit and female NPT threaded connections. Made from bronze, this adapter fits into residential and commercial plumbing and hydronic systems where a tool-free press connection must interface with a threaded component. The press end accepts standard press-fit tooling, while the FNPT end threads directly onto a male NPT fitting or valve. Licensed plumbers and pipefitters install this adapter during new construction and retrofit work wherever mixed connection types meet.
This adapter is suited for plumbing supply lines, hydronic heating distribution, and mechanical room piping where press-fit copper or tubing systems connect to threaded valves, sensors, or manifolds. The 3/4 inch size covers a common branch and main line diameter in both residential and light commercial applications. Its bronze construction stands up to standard domestic water service conditions.
Designed as an OEM-style press-fit adapter for 3/4 inch nominal copper or compatible press-fit tubing systems requiring a female NPT threaded outlet.
Installation of the press end requires an approved press-fit tool with the correct jaw profile for the tubing diameter and system type. Shut off and depressurize the water supply before beginning work. Thread connections at the FNPT end should be made with appropriate thread sealant or tape per local plumbing code. Work must comply with applicable IPC or local plumbing authority requirements.
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