Underground Drainage

Explore our comprehensive selection of underground drainage solutions, featuring a variety of essential products tailored for efficient drainage systems. Our UPVC underground pipes and fittings come in sizes of 160mm and 110mm drainage pipes. They are designed to meet the needs of both smaller property-based projects as well as larger infrastructure project sites.

Our product portfolio ranging from standard pipes to underground drainage fittings seamlessly integrates with diverse underground drainage systems. Manufactured from high-quality PVC-u & Polypropylene, our pipes, bends, gullies, and connectors boast durability and reliability. Available in a distinctive Golden Brown (terracotta) colour, our products ensure easy identification and seamless integration into the drainage network.

Our 100mm, 150mm, and 200mm diameter cast iron pipes and fittings are impeccably crafted from high-quality cast iron, guaranteeing the entire Halifax underground drainage range is fully compliant with the British Standard BS EN 877:1999 + A1:2006 Incorporating Corrigendum 2008. This ensures the pipes meet the highest quality and performance standards for use within your drainage system.

We offer single or bulk purchase options, the latter of which is ideal for buying materials for a large site or project. You can also buy subfloor ventilation products in this section.

Types of Drainage Systems

A diagram of the underground drainage system

In addition to our standard 110mm and 160mm pipes and fittings, we offer a range of specialised drainage solutions:

Cast Iron Pipes and Fittings: Manufactured from high-grade cast iron, these pipes offer unparalleled resistance to high pressure and corrosion. This makes them the ideal choice for a wide range of drainage applications.
Rainwater harvesting systems: Capture and reuse rainwater for diverse purposes, such as watering plants, toilet flushing and vehicle washing.
Channel drainage: Slotted drains ideal for draining stormwater from driveways and patios.
Soakaway crates: Versatile products suitable for sustainable drainage applications like infiltration and attenuation.
Twinwall drainage: Large HDPE pipes commonly utilised for surface water applications.
Sewage treatment plants: Water cleaning tanks designed for properties without mains drainage connections.

Underground Drainage Pipes

Our range of cast iron and plastic underground drainage pipes and fittings, adhere to British Standards, offering reliability and a high level of performance.

We offer various underground drainage pipe sizes. Alongside our standard 110mm and 160mm pipes in this section, we can also supply larger size sewer pipe in 200mm, 250mm, 315mm & 400mm, Cast Iron Drainage available in 100mm, 150mm and 200mm, Twinwall Pipes ranging from 150mm to 600mm, as well as an extensive selection of soil and waste pipes. The majority of domestic drainage pipes are now made from lightweight and manageable PVC-u, providing ease of handling compared to traditional clay drains. Our flexible drainage couplings ensure seamless connections between plastic and clay pipes.

All our socketed plastic underground drainage pipes and fittings incorporate a captive seal and snap cap, engineered for user-friendly installation without sharp edges. Considering space constraints, these fittings facilitate an easy-fit connection. The Halifax Cast Iron Drain system features a socketless, mechanically jointed design that simplifies installation and reduces ongoing maintenance requirements. It is designed to minimise installation difficulties and maintenance costs over its lifetime, making it a "fit and forget" system.

For detailed insights into our drainage fittings, explore our video product reviews covering drainage pipe bends, junctions, and couplings in our guides and tips section.

WHAT IS UNDERGROUND DRAINAGE?

Underground drainage is used to describe the network of pipes and fittings installed below ground level to transport foul drainage or rainwater flows to appropriate disposal facilities. Manufactured primarily from PVC-u for durability and minimal maintenance, underground drainage systems facilitate smooth flow and efficient drainage.

Underground drainage pipes and fittings are almost always Golden Brown (terracotta) in colour. This makes identification easy, as soil pipes installed above ground level are usually in UV-stabilised colours such as black, grey or white.

The Halifax cast iron drainage system has a two-part epoxy coating - the exterior is red for above-ground applications and grey for below-ground. The interior of the Halifax underground drainage pipes is lined with a two-part grey epoxy finish, which provides improved performance when exposed to aggressive substances.

HOW TO INSTALL UNDERGROUND DRAINAGE?

Proper installation of underground drainage pipes involves laying them in a trench lined with pea shingle, ensuring correct fall for efficient drainage. Accessibility for testing, inspection, and maintenance is paramount, following drainage design principles. Planning drainage installations, guided by architectural drawings, help locate critical components such as gullies, inspection chambers, and rainwater adaptors.

CUTTING & JOINING DRAINAGE PIPES

Plastic drainage pipes offer the advantage of easy cutting and joining compared to clay pipes. Standard fine-toothed saws facilitate precise cutting, with chamfering and lubrication essential before joining pipes to fittings. This straightforward process ensures secure and reliable connections, accommodating expansion and ground movement.

Halifax Soil and Drainage pipes are easy to cut on-site for shorter lengths using a powered saw with a metal cutting disc (not a manual hacksaw). These cast iron pipes offer traditional durability with the benefit of modern jointing methods that reduce installation costs.

For in-depth guidance on underground drainage installation, refer to installation guides in the guides and tips section or our comprehensive instructional video.

HOW LONG DO PVC DRAINAGE PIPES UNDERGROUND LAST?

Whilst this depends on the exact composition of the surrounding soil, any PVC underground drainage pipe manufactured to BS4660 or BS EN 1401 should last more than 50 years.

The life of any drainage system will be prolonged by proper installation and regular maintenance when required. Slow flows, gurgling sounds from the sink, bath, or shower, or foul odours in the house or garden are all signs of a blocked drain and should be investigated as soon as they occur.

COMPATIBILITY WITH SOIL & WASTE SYSTEMS

Our underground drainage products are fully compatible with our above-ground PVC-u soil and waste systems.

In the plastic drainage section, you will find all of the most commonly used drainage bends and different types of connectors and adaptors along with gully traps and other basic components of the drainage system. This system is interchangeable with all other leading manufacturers of 110mm and 160mm systems.

Additionally, our Halifax drain system is also compatible with Halifax cast iron soil and cast iron mech 416 systems. The standard couplings within the Halifax Soil and Drain systems are suitable for connecting products made of other materials into the system, as long as the external diameters are the same.

DELIVERY CUT OFF TIMES

All orders are being dispatched as normal. Unless subject to exclusions, all orders received before 12pm will be delivered the next working day.

Please note, standard Cast Iron Gutter systems have a cut off time of 11am. Large or palletised orders have a cut off time of 12pm.

ORDER DAY	DELIVERY CUT OFF TIME	DELIVERY DAY*
Monday	12pm	Tuesday
Tuesday	12pm	Wednesday
Wednesday	12pm	Thursday
Thursday	12pm	Friday
Friday	12pm	Monday
Saturday	12pm	Tuesday
Sunday	12pm	Tuesday
Bank Holidays (except Bank Holiday Monday)	12pm	Next Working Day (Bank Holiday Monday orders will be delivered the following Wednesday)

*Delivery to non-Industrial Scotland, Northern Ireland, and CH, LL, and CA postcodes can sometimes take slightly longer, although this is dependent upon the exact location.

If we are unable to deliver your order within the above timeframe for any reason, we will contact you to arrange an alternative delivery day. We use overnight carriers, so we are unable to arrange or confirm an exact time of delivery.

Some special or non-stocked items on our website have extended lead-times, which are displayed on the product pages in question – see below for more details.

Whilst every reasonable effort shall be made to keep to a delivery date, we cannot be held liable for any losses, costs, damages, or expenses arising directly or indirectly out of any failure to meet any estimated delivery date.

In the unlikely event of a late delivery, we will be unable to compensate you for any consequential loss, so please do not organise any plant or labour before you have received your materials.

DELIVERY CHARGES AND EXTENDED LEAD TIMES

Orders over £250 excluding VAT will be delivered free of charge. Orders under this amount will incur a charge of £15.00 + VAT. This applies to most stocked items and some items that are supplied directly from manufacturers. Orders of stocked items are generally delivered in 1-3 working days.

Some stocked items will incur a bulky or pallet charge due to their extreme weights or lengths:

Bulky items - £45.00 + VAT charge placed on orders that contain one or more bulky products. These items will be marked as bulky during the checkout process.
Palletised items - £60.00 + VAT charge placed on orders that contain one or more items that need to be sent and delivered via a pallet. These items will be marked as palletised during the checkout process.

A full list of stocked items can be found here.

Certain items, usually those sent direct from manufacturers, incur additional delivery charges and an extended lead time regardless of the order value, due to the restrictions placed upon us by our carrier and the extreme weights/lengths. These charges are applied instead of the standard £15.00 + VAT charge if the order is valued under £250 excluding VAT.

The following product ranges have extended lead times or incur additional delivery charges. Please click on each individual range for specific details.

OUR COURIER PARTNERS

COURIER NAME	ORDER TRACKING	CONTACT INFORMATION	DELIVERY DAYS	NEXT DAY DELIVERY?
DX	Use online tracking portal	8am-6pm Mon-Fri (£35 charge for AM delivery - available for stocked items only) 8am-4pm Sat (£40 charge for Saturday delivery - available for stocked items only) Express: 0333 241 5700 Freight: 0333 241 1100	Mon-Sat	Yes
DHL	Use online tracking portal	7am-8pm Mon-Fri, 8am-6pm Sat 02476 937 770	Mon-Sat	Yes
DPD	Follow the information provided via SMS	8am-6.30pm Mon-Fri, 8am-4pm Sat, 9am-3pm Sun 0121 275 0500	Mon-Sat	Yes
Magnus/Pallex	Please contact us directly	N/A	Mon-Fri 8am-6pm	Yes
Own Transport	Please contact us directly	Email: [email protected] Phone: 01206 867500	Mon-Sat	Yes

OUR DELIVERY AREA

LOCATION	RESTRICTIONS	ADDITIONAL CHARGES	NOTES
Mainland UK	N/A	No additional charges for location, product specific delivery charges still apply	N/A
Ireland Jersey Guernsey	We are currently unable to deliver to these areas	N/A	N/A
Isle of Man Isle of Wight Scottish Highlands Northern Ireland		Additional delivery charge applies. Amount dependent on weight and length of product ordered. PBSL Group will contact you regarding this charge after we receive your order.	N/A
Scottish Isles	N/A	Additional delivery charge applies. Amount dependent on weight and length of product ordered. PBSL Group will contact you regarding this charge after we receive your order.	Many of our customers in the Scottish Isles choose to have their order redirected to a local haulier such as Woody's Express or Hebrides Haulage in Inverness.

Certain direct suppliers are able to ship outside of these areas depending on product quantity and availability. Please get in touch with us regarding any such queries.

SPLIT DELIVERIES

If you have ordered a mixture of goods that come both from us and direct from our manufacturing partners, you will be advised of this in your dispatch email. As the order is coming from two locations, you will receive two different deliveries. Delivery on direct items can have extended lead times and will need someone present to check and sign for the goods.

Occasionally, we don't have all items in stock at our main warehouse. If this is the case, we will endeavour to send the stock the same day from one of our other branches, in order to not delay delivery of the complete order. This may lead to a split delivery, dependant on the courier being used. We will contact you if there is going to be a delay due to this.

LABOUR AND MACHINERY

Please do not book machinery or labour until your goods have been received and checked over. Whilst every effort is made by our couriers to deliver your parcel within the stated timeframe, Professional Building Supplies cannot be held responsible for any additional costs incurred by delays outside of our control.

CHECKING AND SIGNING FOR ORDERS

SIGNED FOR POLICY – T&CS

All orders should be signed for. If you are unable to sign for your delivery, you can arrange with us for a neighbour to take delivery of your order. You can also advise us of a safe place where your order can be left, although we cannot take responsibility for any shortages or obvious damages.

Please ensure that you always check the number of packages that you are signing for. If there is an incorrect number of packages or any package appears damaged, you should note this on the signature panel and advise us so that we can rectify the issue as quickly as possible. Once goods have been signed for as being received ‘complete and in good condition’, any claims are not covered by the carrier’s insurance company.

Signing for goods as ‘unchecked’ makes any claims inadmissible, so please check the number of packages and look for any signs of any damage, noting any issues on the signature panel. Although the delivery drivers are busy, they are contractually obliged to wait whilst you check your delivery.

WHAT IF I CAN’T WAIT IN ALL DAY?

There is a ‘Notes’ section of the Basket review page where you can request for your goods to be left in a safe location – just tell us where to leave the order. Please not that we cannot take responsibility for any shortages or obvious damages if goods have not been signed for.

Please note that deliveries made by DHL (these are generally small orders with no pipe or bulky products) cannot be left in a safe location. You will be advised which carrier will be delivering your order by email at the point of dispatch.

REFUNDS, RESTOCKING AND RETURNS

RESTOCKING CHARGES

PRODUCT	RESTOCKING FEE (% OF PRODUCT PRICE)	COLLECTION CHARGE
Copper and Zinc Gutters	20%	£70
Storm Building Products	15%	Yes – depending on order value
Guardian Building Products	15%	Yes – depending on order value, plus return carriage charge if required
Clear Amber Products	30%	N/A
Shower Wall Cladding	35%	N/A
Painted Aluminium products	MADE TO ORDER – CANNOT BE RETURNED	MADE TO ORDER – CANNOT BE RETURNED
Cast Iron: Premier Primed Standard Rainwater, Premier Primed Sand Cast Rainwater, Premier LCC Soil, Halifax Soil & Drain Systems Fittings Only	25%	N/A
Cast Iron: Premier Extra (Black) Standard Rainwater, Premier Extra (Black) Sand Cast Rainwater, Mech 416 Soil System Fittings Only, Traditional Express Soil System	35%	N/A
FH Brundle Steel Fencing	20%	N/A

For further information and clarification of the legislation surrounding the return of goods, and associated costs, please refer to regulation 35 of The Consumer Contracts (Information, Cancellation and Additional Charges) Regulations 2013.

RETURNS AND REFUNDS

Please read our Returns & Refunds policy for further details.