Brass 3/8" FNPT x 3/8" Compression Tube Stub Tapeless PRV Adapter

Detailed Product Description

1. Appearance & Construction
This small brass fitting is available in both L-shaped and straight configurations. One end features an internal threaded (FNPT) connection, while the other utilizes a compression connection complete with a nut and ferrule (typically pre-assembled).

2. Core Function
Designed specifically to safely and conveniently connect a household water supply line to the outlet of a pressure relief valve.

3. How It Works

  • FNPT End: Hand-tighten directly into the 3/8-inch outlet of a Pressure Relief Valve (PRV) or T&P Valve. The integrated gasket ensures a leak-proof seal at this connection point.

  • Compression End: Insert a 3/8-inch OD copper or PVC discharge tube into this end, then tighten the compression nut. The ferrule deforms to securely grip the tube, creating a strong, reliable seal.

The connected tube - commonly referred to as a "discharge tube" or "drain line" - safely channels the small amount of water released during pressure relief events to a suitable drainage point or outdoor location.

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