Perfexim screw joint coupling 702 for 20 mm pipe with 1/2" female thread

The Perfexim screw joint coupling 702 for 20 mm pipe with 1/2" female thread is a threaded transition fitting designed to join 20 mm plastic or metal tubing to a standard 1/2" female (GW) connection. Manufactured by Perfexim, this coupling provides a compact solution for creating a reliable mechanical and threaded interface between small-diameter pipework and conventional plumbing fixtures or valves. It is intended for use in plumbing, heating and water supply systems where a stable threaded connection is required.

Advantages

The coupling delivers a straightforward threaded interface that simplifies installation between 20 mm pipe and 1/2" female fittings. Its design supports a secure mechanical connection, reducing the risk of leaks when correctly fitted and sealed. The compact form factor minimizes space requirements in tight installation locations while allowing compatibility with common plumbing components that use a 1/2" female thread.

Suitable for

• Connecting 20 mm plastic or metal pipe to valves, faucets or fixtures with 1/2" female thread
• Domestic and commercial water supply lines
• Heating system connections and branch lines
• Repair and retrofit work where a threaded transition is needed

Key specifications

• Designed for 20 mm outside-diameter pipe
• Threaded connection: 1/2" female (GW)
• Threaded transition coupling type suitable for plumbing and heating systems
• Compact size for use in confined spaces
• Materials compatible with plastic and metal tubing (follow installer guidance for material-specific sealing)

How to use

Prepare the 20 mm pipe end by cutting square and deburring to ensure a clean fit. Insert the pipe into the coupling according to the coupling type and tighten to the recommended torque for the material and connection method. Apply appropriate thread sealant or tape to the 1/2" male thread of the mating fitting before engaging the female thread of the coupling to ensure a watertight joint. After assembly, check the junction under working pressure and inspect for any leaks, then retighten or reseal if necessary.

Usage recommendations

Use compatible sealants and follow local plumbing codes. For mixed-material connections (plastic to metal), follow manufacturer's guidance on torque limits and additional sealing or transition sleeves where required. If uncertain about installation, consult a qualified plumber to ensure correct assembly and leak-free operation.