Building Materials
Underground Drainage for Caernarfon, delivered to site
Underground drainage is the system of plastic pipes, bends, junctions and inspection chambers that carries foul and surface water away from a building, most often in 110 mm PVC-U pipe.
SK Trade is a builders' merchant delivering drainage into Caernarfon, priced to your postcode and confirmed in writing.

Caernarfon delivery at a glance
- How it arrives
- Pipe lengths and boxed fittings
- Delivery
- Standard mainland delivery
- Daylight
- About 7h 32m on the shortest day
- Nearby (straight line)
- Bangor (Gwynedd) (8 mi), Holyhead (19 mi), Colwyn Bay (25 mi)
- Postcode districts
- LL55, LL54
- Delivering to
- Caernarfon, Gwynedd
Our drainage range for Caernarfon jobs
- Gullies and channel drainsTo collect surface water from yards and drives.
- 110 mm and 160 mm pipePVC-U underground pipe in 3 m and 6 m lengths.
- Bends, junctions and couplersFittings to change direction and join branches.
- Rainwater systemsGutters, downpipes and fittings.
- Inspection chambers and coversPlastic chambers with covers rated for the location.
A quick quantity check
An 18 m run of 110 mm drain needs 6 pipes in 3 m lengths (or 3 in 6 m lengths), plus a bend or junction at each change of direction and an inspection chamber where your design shows one. Add pea gravel for bedding and surround and we will price the lot together.
Getting drainage onto your Caernarfon site
Pipe travels in 3 m and 6 m lengths; fittings and chambers come boxed or loose with the load. Caernarfon is inside our standard mainland delivery area.
- If neighbours share the access, it helps to let them know a lorry is coming.
- If the site is up a shared drive or behind other houses, tell us the distance from the road.
- For a phased build we can split the order so materials arrive as each stage starts, which keeps the site clear.
Underground Drainage: choosing well
Building over or near a sewer
Building near a public sewer may need permission from the water company. Check before you dig.
Covers for the location
Chamber covers are rated for loads, from pedestrian areas to drives. Tell us where each chamber sits.
Wales has its own Approved Documents, including its own Part L for energy efficiency, and building control is handled by the local authority or a registered approver.
Underground Drainage questions
Do you deliver drainage to Caernarfon?
Yes. We deliver across Caernarfon, including LL55, LL54. Caernarfon is inside our standard mainland delivery area. Send your list or call 0800 088 6341 and we will price it delivered to your postcode.
Do you supply gutters and downpipes?
Yes, in common profiles and colours, with brackets and fittings.
Can I add other materials to my Caernarfon delivery?
Yes. Put everything on one list, from drainage to fixings and PPE, and we will price it as one delivery where the products can travel together.
What size drainage pipe do I need?
110 mm is the standard size for most domestic underground foul and surface water drains; 160 mm is used for larger runs. Your design or building control will confirm.
Underground Drainage in neighbouring towns
- Underground Drainage in Bangor (Gwynedd)
- Underground Drainage in Holyhead
- Underground Drainage in Colwyn Bay
- Underground Drainage in Rhyl
- Underground Drainage in Flint
- Underground Drainage in Buckley
Other materials for Caernarfon sites
- Plaster & Beads in Caernarfon
- Concrete & Aircrete Blocks in Caernarfon
- Adhesives, Sealants & Foam in Caernarfon
- PIR Insulation Boards in Caernarfon
- Building & Sharp Sand in Caernarfon
- MOT Type 1 Sub-base in Caernarfon
- Anchors, Bolts & Threaded Rod in Caernarfon
- Joist Hangers & Timber Connectors in Caernarfon
Send your list, get a delivered price
Tell us what you need and where it is going. We check the quantities and come back with a delivered price before you commit.
