Straight Coupling Herz P702022 20x2 to Rp3/4 with Female Thread

Herz P702022 straight coupling connects a 20x2 pipe to a Rp3/4 threaded fitting using a female thread. Designed for plumbing and heating systems, the coupling creates a reliable mechanical transition between dimensioned copper or similar 20x2 tubing and a BSP/Rp3/4 threaded component. Its straight, compact form allows use in confined spaces and in-line installations where a direct axial connection is required.

Advantages

The coupling offers a simple mechanical connection without the need for soldering or complex adapters, reducing installation time. Its female Rp3/4 thread provides compatibility with widely used BSP/Rp fittings, while the 20x2 end fits standard 20 mm tubing. The straight design ensures a minimal flow disruption and a compact footprint in pipe runs. Materials and thread precision ensure secure sealing when installed with appropriate sealing tape or washers.

Suitable for

• Residential and commercial plumbing supply lines
• Heating system connections and radiators
• Transitions between metric 20x2 pipes and BSP/Rp3/4 threaded components
• Repair or retrofit work where replacing whole sections is impractical

Key specifications

• Connection A: 20x2 pipe (suitable for 20 mm copper or comparable tubing)
• Connection B: female Rp3/4 threaded fitting (BSP/Rp standard)
• Type: straight coupling for axial pipe-to-thread transition
• Application: plumbing and heating systems
• Installation position: inline, suitable for confined spaces

How to use

Prepare the 20x2 pipe by deburring and ensuring a clean, square cut. Insert the pipe into the coupling end designed for 20x2 and secure according to the coupling's assembly method (mechanical compression, press-fit or compatible fixation based on product family). Apply suitable thread sealant (PTFE tape or approved liquid sealant) to the male Rp3/4 thread of the mating component, then engage threads by hand and tighten with an appropriate wrench until a secure, leak-free connection is achieved per applicable torque guidance. After assembly, pressure-test the system according to local standards.

Usage recommendations

Use correct sealing materials for BSP/Rp threads and follow local plumbing and heating codes. Avoid over-tightening to prevent thread damage and ensure the 20x2 pipe is fully inserted and supported to reduce stress on the coupling. For press-fit or compression variants, follow the manufacturer's instructions and tooling requirements to achieve reliable joints.