Find practical guidance for selecting, installing and using DMfit push-fit fittings. Start with the product table for the fitting you need, then use the guides below to check tubing, threads and material compatibility.
Installation and disconnection
Watch the animated DMfit installation guide to see tube preparation, connection, retention checks and disconnection. The demonstration uses 3/8-inch tubing. Refer to the instructions for your specific fitting and depressurise the system before disconnecting it.
Identify tube sizes and threads
Use the thread and tube size identification guide to compare metric and imperial tube outside diameters and learn how to measure male and female connections. Check the exact thread designation in the product table before ordering.
Check material compatibility
The chemical compatibility reference covers acetal (POM), polypropylene, EPDM and NBR. Standard UK fittings use a POM body and EPDM O-ring; other material combinations are special order. Use the reference alongside the specific product information and the application’s operating conditions.
Product specifications and downloads
Browse the DMfit product catalogue for sizes and part numbers, or download the catalogue and installation guide. For help, contact the UK team with the part number, tube outside diameter, thread type, fluid, pressure and temperature.