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.
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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.