Unifix / FM Products Openlok Pipe Clips

Unifix Openlok pipe clips have been a trusted staple on British plumbing and heating jobs for over 25 years. Made from heavy grade heat-resistant polypropylene, these clips are built to handle the temperatures you’d expect from central heating pipework without sagging, cracking or losing their grip. If you’ve ever had a clip deform around a hot flow pipe, you’ll know why the material specification actually matters here.

The defining feature of the Openlok design is the single screw fixing. You can fix the clip to the wall or joist with the pipe already sitting in it, which cuts out the fiddly step of positioning the pipe after fixing. On a long pipe run, that saves a noticeable amount of time. It also means you can make adjustments without fully disturbing everything you’ve already clipped off.

Openlok Pipe Clips: Single and Double Formats

Openlok pipe clips come in both single and double versions. Single clips are the go-to for most standard runs, while double clips are useful where two parallel pipes run close together and a shared fixing point makes more sense than two separate ones. Both formats are available in 15mm, 22mm and 28mm to cover the pipe sizes you’ll encounter on the vast majority of domestic and light commercial installations.

The clips are sold in box quantities of 50 or 100 depending on size, so they’re practical to buy in bulk for larger jobs rather than picking up a card of ten from a plumbers’ merchant every time you need more.

Unifix also produce a range of accessories to complement the Openlok system, covering brackets, backplates and other fixing solutions that work with the same clip design. Worth knowing if you’re fitting out a full plant room or dealing with an awkward installation.