What is a pipe clip?
A pipe clip — also called a pipe bracket or pipe clamp — is the fixing that holds a pipe to a wall, ceiling or floor. It consists of a metal or plastic band that closes around the pipe, usually with a threaded boss or plug to fasten it to the structure.
Types
- Hinged clip with rubber liner — the standard for water and heating pipes. The liner damps noise and absorbs movement.
- Saddle clip (double-lipped clip) — simple plastic clip, widely used on plastic waste pipe.
- Snap or push-fit clip — quick to fit, suitable for light pipework.
- Threaded rod with clip — for ceiling installation, adjustable in length.
- Mounting channel with slide nuts — for pipe runs; several pipes side by side on one profile.
Support spacings
Too few clips means sagging, standing water in waste pipes and knocking pipework. As a guideline for plastic above-ground drainage:
- Horizontal: roughly ten times the pipe diameter, up to about 1.25 metres.
- Vertical: roughly twenty times the pipe diameter, up to about 1.5 metres.
Metal pipework and potable water installations follow different spacings. Always work to the manufacturer’s instructions and the applicable codes; they vary by material and diameter.
Fixed and sliding points
This is where it most often goes wrong in practice. A pipe expands with temperature — plastic waste pipe moves noticeably when a bath drains, a heating pipe when the system warms up.
- Fixed point: one clip that grips the pipe and takes the movement, usually right at a socket or branch.
- Sliding points: all other clips slightly looser, so the pipe can slide within them.
Tighten every clip and the pipe has nowhere to go: it bows, kinks, or knocks loudly in the duct.
Practical tips
- Always clip just after a change of direction and as close as possible to sockets and branches; that is where the weight and the load transfer sit.
- Avoid structure-borne noise. Use clips with a rubber or EPDM liner, especially on soil stacks beside a bedroom. Never metal directly on metal.
- Fix into sound material. In aerated concrete, gypsum blocks or hollow walls use a suitable anchor; a standard plug in aerated concrete will pull out under a full pipe.
- Allow for insulation. On insulated pipework the clip must fit around the insulation, with a load-bearing support shell — otherwise the insulation is crushed flat.
Related terms
- Above-ground drainage
- Soil stack
- Structure-borne noise
- Thermal movement
- Service duct
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