NVS Brass Conical Union

NVS - Yellow Tapered Union

The Yellow Tapered Union is a connecting element used in water plumbing, generally preferred for providing leak-tightness in polypropylene (PP-R) or PVC piping systems.

Features and Purpose:

1. Tapered (Taper-Threaded) Design:
• The yellow color of the union may indicate the material type or intended use (for example, a specific pressure or temperature rating).
• Thanks to its tapered shape, it forms a tight fit when screwed onto the pipe and prevents leaks.
2. Material:
• It is usually made of materials such as nylon, polypropylene or brass.
• Yellow versions may be marked for a specific standard or for use in hot water lines.
3. Areas of Use:
• In water plumbing connections (cold/hot water lines).
• In booster pump systems, central heating installations or pressurized lines.
• At the threaded connection points of PVC or PP-R pipes.

Installation and Advantages:

• Thanks to its tapered design, it seals without the need for a gasket.
• It can be made even more secure by reinforcing it with Teflon tape (PTFE) or thread sealant paste.
• The yellow color may be used to distinguish different pressure or temperature ratings (varies by standard).

Important Notes:

• The correct size (such as 1/2", 3/4") should be selected.
• Overtightening may crack the pipe or the union.

If you are looking for information about a specific brand or standard (e.g. DIN, ISO), it is useful to consult the product catalog or technical documentation.