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Aspirating Detection Pipework and Fittings

Sampling pipe, fittings and sampling points for aspirating smoke detection — 25mm ABS in red and white, 10mm capillary tube, filters, traps, purge kits and test points. Supplied UK-wide to fire alarm contractors, specifiers and FM teams, with mainland-UK dispatch on stock items and engineering advice on the phone.

25mm ABS 10mm capillary Red & white
System families

Pick a range.

ASD Pipework 25mm Red Pipe & Fittings
25mm Red Pipe & Fittings
Red 25mm ABS sampling pipe with the full fitting set — sockets, bends, elbows, tees and end caps — for visible ASD runs.
ASD Pipework Sampling Hole Clips
Sampling Hole Clips
Push-in clips that set a defined sampling hole diameter in 25mm ASD pipe, from a blanking clip up to 6.5mm.
ASD Pipework 25mm White Pipe & Fittings
25mm White Pipe & Fittings
The same 25mm ABS pipe and fittings in white, for aspirating runs crossing finished ceilings and occupied areas.
ASD Pipework Discrete Sampling Points
Discrete Sampling Points
Flush and conical sampling point kits and heads for taking a discrete sample into a room from a capillary drop.
ASD Pipework Test Accessories
Test Accessories
Smoke pens, pellets, test wire and matches for transport-time and commissioning tests on aspirating systems.
ASD Pipework Air Purging
Air Purging
Manual blow-through kits and valve sets for clearing dust from a sampling pipe without breaking the run.
ASD Pipework Flexible Connectors
Flexible Connectors
300mm flexible 25mm connectors that absorb movement and alignment where rigid ASD pipe meets the detector.
ASD Pipework Tamperproof Sampling Points
Tamperproof Sampling Points
Sampling points designed to resist interference, for custody, cells and public areas — 25mm pipe and capillary versions.
ASD Pipework Water & Condensation Traps
Water & Condensation Traps
Water traps, condensation traps and drains that keep moisture out of the aspirator on damp or unheated runs.
ASD Pipework In-Line Filters
In-Line Filters
In-line filters and replacement elements that keep dust out of the detector chamber in dirty environments.
ASD Pipework Capillary Pipe & Tees
Capillary Pipe & Tees
10mm capillary tube with the 25mm-to-10mm tees and trunk adaptors that drop a sampling point off the main run.
ASD Pipework Pipe Clips & Fixings
Pipe Clips & Fixings
Clips for supporting 25mm ASD pipe against structure at the spacing the pipe run design calls for.
ASD Pipework Pipe & Sampling Labels
Pipe & Sampling Labels
Identification labels for ASD pipe runs and sampling points, so the installation reads correctly at handover.
ASD Pipework Refrigeration & Freezer Sampling
Refrigeration & Freezer Sampling
Freezer-pattern sampling clips and a refrigerated storage kit for cold rooms where ice defeats a standard point.
ASD Pipework Purge & Flow Control Valves
Purge & Flow Control Valves
In-line valves and flow-control fittings fitted to ASD sampling runs that need purging or airflow protection.
ASD Pipework Test Points
Test Points
End-cap and capillary test points that let an engineer introduce test smoke at the end of a sampling run.
ASD Pipework Exhaust Fittings
Exhaust Fittings
Exhaust-side fittings for aspirating detectors, including silencing where the detector sits in a quiet space.
ASD Pipework Pipework & Adaptors
Pipework & Adaptors
Expansion sockets, thread and copper adaptors and imperial transitions for joining ASD pipe to existing services.
ASD Pipework Installation Tools
Installation Tools
Pipe cutter and solvent cement for cutting and jointing 25mm ABS sampling pipe on site.
FAQ

Common ASD Pipework questions.

What size pipe does an aspirating detection system use?

25mm ABS is the standard main run, with 10mm capillary tube used for drops to discrete sampling points. We list 25mm pipe and the matching fitting set — sockets, unions, bends, elbows, tees and end caps — in both red and white, plus capillary tube and the 25mm-to-10mm tees and adaptors that join the two.

What is the difference between red and white ASD pipework?

The colour. Red is the usual choice in plant rooms, warehouses, voids and risers where the pipe is visible and wants identifying as fire equipment. White is specified where the run crosses a finished ceiling or an occupied space. The same fitting set is listed in both, so a job can be run in one colour throughout or split by area.

How are sampling hole sizes decided?

By the pipe-run design. The aspirating detector's design calculation sets the hole diameter at each sampling point so airflow stays balanced from the far end of the run back to the detector. Push-in sampling clips let an engineer fit a defined hole size on site, from a 0.0mm blanking clip up to 6.5mm, rather than relying on the drill bit.

Do you supply ASD fittings for cold stores and freezers?

Yes. Freezer-pattern sampling clips and a refrigerated storage sampling kit are listed under the refrigeration range, and water traps, condensation traps and drains sit under environmental fittings for runs that cross damp or unheated areas. Tell us the ambient conditions and what the pipe run has to pass through.

Need ASD Pipework kit priced today?

Send the part numbers — same-day quotes on stocked items, and straight answers on lead times when it is not on the shelf.