Compression fittings are a simple and reliable way to connect copper pipes without the need for soldering or welding. Favoured by both professionals and DIY installers, copper pipe connectors provide a secure, leak-proof joint that’s ideal for plumbing, gas and HVAC systems.
Sourcing compression fittings
The manufacture of compression fittings is a highly specialised area, with only a relatively small number of companies producing these products. They are available from merchants such as //watkinspowis.co.uk/products/copper-pipe-fittings-and-press-systems, with in-depth knowledge and expertise available.
How do compression fittings work?
A standard compression fitting has three key parts: the body, the ferrule – or compression ring – and the nut. When the nut is tightened, it compresses the ferrule between the pipe and the fitting body. This gentle deformation of the ferrule creates a tight mechanical seal that prevents gas or fluid from escaping.
Connectors are manufactured from various materials to suit different applications.
Brass
Brass fittings are the most common for domestic water and gas services thanks to their corrosion resistance and compatibility with copper.
Stainless steel
Stainless steel types offer extra strength for higher pressures or more aggressive fluids.
Plastic
Plastic fittings provide a lightweight, non conductive option for low pressure water supplies.
Copper
Copper pipe connectors maintain uniform thermal expansion, which is ideal for refrigeration systems.
Carbon steel, however, should not be used with copper since galvanic corrosion can quickly damage the joint.
Compression fittings combine versatility, ease of use and reliability, making them a popular method of connection in modern copper pipework.
