Industry Applications

April 22, 2026

P-Clips for Construction: Cable and Pipe Management on Building Sites

Specifying P-clips for construction sites and permanent building installations — material selection, outdoor durability, temporary vs permanent use.

P-clips are used throughout construction — from temporary site services to permanent building installations. Applications range from supporting copper pipework in commercial buildings and securing conduit runs on steel frame structures, to routing cable and compressed air lines in mechanical and electrical plantrooms. The key specification decisions are material choice for the environment and correct sizing for the pipe or cable OD.

Common Construction Uses

Copper Pipework

HVAC, plumbing, and heating pipework in commercial and residential buildings. Standard P-clips, zinc-coated, sized to copper pipe OD. See our HVAC guide for sizing.

Conduit and Cable Trunking

Supporting metallic conduit runs on steelwork and masonry. Standard P-clips, M6 or M8 fixing hole, sized to the conduit OD.

Compressed Air Distribution

Workshop and plant room compressed air pipework in steel, copper, or aluminium. Standard clips for most diameters; heavy-duty for large-bore main runs.

Plant Room Hose and Pipework

Pump connections, chiller pipework, and fan coil unit connections. Zinc-coated for dry plant rooms; stainless for high-humidity or washdown environments.

External Pipework Runs

Drain lines, gas supply lines, and external building services. Zinc-coated for sheltered locations; stainless for exposed and coastal locations.

Site Temporary Services

Temporary power, water, and compressed air distribution on active construction sites. Zinc-coated adequate for temporary use.

Material Selection

The construction environment varies considerably — from climate-controlled office interiors to exposed external plantrooms. Material selection should reflect the actual environment the clip will be in throughout its service life, not just during installation:

Zinc-coated mild steel: appropriate for internal building services, plant rooms without washdown, and sheltered external installations away from the coast
Stainless steel: required for exposed external locations subject to rain, washdown environments (food production, commercial kitchens), coastal buildings, and any installation where the expected service life exceeds the zinc coating performance in the actual environment

See our material comparison for full guidance: Stainless Steel vs Zinc Coated P-Clips.

Pipework Support

For copper pipework, the nominal clip size equals the copper pipe nominal size — a 22 mm clip for 22 mm copper tube, a 15 mm clip for 15 mm copper tube, and so on. Support spacing should follow BS EN 806 guidance:

15 mm copper: 1,200 mm horizontal
22 mm copper: 1,800 mm horizontal
28 mm copper: 1,800 mm horizontal
35–42 mm copper: 2,400 mm horizontal
Within 150 mm of every bend, tee, or fitting

For larger-bore pipework in plant rooms, see the full sizing chart.

Cable and Conduit Management

Steel wire armoured (SWA) cable and metallic conduit are commonly clipped to building structure in construction. The clip nominal diameter should match the conduit or cable OD. Standard clips with M6 fixing holes are correct for most applications — M8 for larger conduit diameters above 32 mm.

Temporary vs Permanent Installations

For temporary site services — power distribution, water supply, and compressed air on active construction sites — zinc-coated clips are adequate. The key requirement is that they hold the item securely for the duration of the site programme. For permanent building installations, specify for the full building service life, taking into account the environment the clip will be in over decades, not just at installation.

Quick Reference Table

Application	Type	Material	Fixing Hole
Copper pipe ≤28 mm, internal	Standard	Zinc-coated	M6
Copper pipe ≤28 mm, external sheltered	Standard	Zinc-coated	M6
Copper pipe, external exposed / coastal	Standard	Stainless	M6
Conduit ≤32 mm	Standard	Zinc-coated	M6
Conduit >32 mm	Standard	Zinc-coated	M8
Plant room hose / compressed air	Standard / HD by OD	Zinc-coated	M6–M8
Washdown environment	Standard / HD by OD	Stainless (A4)	M6–M8

FAQs

Can P-clips be used outdoors on construction sites?

Yes. For temporary or semi-permanent outdoor installations in sheltered locations, zinc-coated P-clips are adequate. For permanent exposed outdoor installations — particularly in coastal areas or subject to standing water — stainless steel is the correct specification.

What size P-clips are typically used in construction?

Construction installations commonly use clips in the 15–54 mm range for pipework and 10–35 mm for cable management and conduit. The correct size depends on the OD of the pipe or cable assembly being secured.

Are P-clips suitable for securing conduit to steel frame buildings?

Yes. P-clips with M6 or M8 fixing holes are commonly used to secure conduit runs to steel frame structures. The EPDM liner prevents metal-to-metal contact between the conduit and the clip band.

What P-clip material should I use in a commercial building plant room?

Zinc-coated mild steel is the standard for most dry plant room applications. If the plant room includes regular washdown, steam, or significant humidity, stainless steel provides better long-term corrosion resistance.

Do P-clips comply with building regulations for pipework support?

P-clips should be specified to meet the support spacing requirements of the relevant British Standard for the pipe type. For copper pipework, BS EN 806 gives support spacing guidance. The clip must be correctly sized and the fixing point must be adequate for the load.

P-Clips for Construction

British-made, full range from 5–90 mm, zinc-coated and stainless. Filter by size and fixing hole.

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