Pattrick & Thompsons has been a trusted builders’ and timber merchant in King’s Lynn since 1865, offering quality Drainage & Ducting supplies—ideal for contractors, tradespeople, and homeowners. Drainage & Ductingsupplies are available for delivery or can be collected in our King's Lynn store. If you still need some assistance, please contact us.
What You’ll Find Here
Below Ground Drainage – Choose from pipes, bottle gullies, access chambers, bends, couplings, and soakaway crates for robust underground systems.
Manhole Covers – Secure, load-rated access points for maintenance and service entries.
Channel Drainage – Durable linear surface drainage solutions—perfect for patios, driveways, and external paved areas.
Why Shop with Us?
Local stock, local support – Visit our King’s Lynn site on Page Stair Lane for same-day click‑and‑collect or quick local delivery
Expert advice – Our long-serving team of local professionals understands regional drainage standards—and can guide you to the best solutionsQuality you can trust – We stock recognised brands and offer products compliant with UK regulations, backed by over a century of service .
Convenient purchasing options – Free delivery on orders over £50 plus flexible click‑and‑collect on all in‑stock items
🛠 Ready to Complete Your Project?
Browse our Below Ground Drainage, Manhole Covers, and Channel Drainage sections now. Whether you're planning a build or repair, Pattrick & Thompsons delivers reliable stock, expert insight, and local convenience to get your project done right—on time.
Underground 110mm x 87½° B4081 Triple Socket Branch size is a reliable and efficient solution for connecting two underground drainage systems. With its push-fit connection, it offers convenience and ease of installation. Crafted from robust and durable uPVC, this triple socket branch is not only sturdy but also lightweight, making it simple to handle during installation.
Underground 110mm x 87½° B5101 Double Socket Branch is a top-quality drainage fitting manufactured in the UK to meet rigorous quality standards. This ensures that the installer receives a product range that is not only reliable but also performs consistently over time
Underground 450mm B5398 Chamber Riser Sealing Ring is specifically designed to ensure a secure and tight seal when connecting a chamber to a riser or riser to riser. This sealing ring plays a crucial role in maintaining an airtight and watertight connection, preventing any leakage or seepage.
Ground Guard Grass Grid 585 x 385mm represent a lightweight yet remarkably efficient ground reinforcement system, ideal for stabilizing grass or gravel surfaces. The installation process is effortless, as the fittings seamlessly click together without the need for extra fixings or tools. Additionally, these tiles can be easily customized by cutting to shape, accommodating irregular edges with convenience.
Aco 1m Hexdrain Channel & Plastic Grating A15 - The ideal drainage channel for domestic applications, with integral plastic grating. Suitable for pedestrian and vehicle traffic up to Load Class A 15 including residential driveways, patios and pathways.
Aco Hexdrain Accessory Bag - units are made from recycled polypropylene. The kit comes complete with the essentials for installing HexDrain drainage systems.
Flexseal 100-115mm Drainage Coupling DC115 - Fernco, previously known as Flex seal Flexible EPDM Rubber Drain Coupler for Repairing or Connecting Non-Pressure Pipes Between 100mm to 115mm. Easy to Install Providing an Efficient, Airtight and Watertight Connection.
Aco Hexdrain/Raindrain Closing End Caps provides a discreet slot drainage system for domestic up to 60mm block paving installation and threshold drainage.
Flexseal 121-136 / 110-121mm Adaptor Coupling AC4000 - also known as a reducer coupling, is designed with a stepped moulded sleeve that allows it to connect unadopted drainage pipes together that have different outside diameters – connecting larger pipes to smaller pipes and vice versa. Each end has a stainless-steel clamping band used to create a strong seal between the pipe and the coupler.
ACO HexDrain Corner Unit with Black Plastic Grate and Vertical Outlet is part of the HexDrain family of products. HexDrain products are suitable for domestic applications up to Load Class A 15. The channels simply clip together, allowing for quick and easy installation, with an 80mm depth the ACO HexDrain is great for challenging domestic installations.
PSM1A Polystorm Modular Water Storage Unit Soakaway Crate 1000x500x400 - Your soil type will determine the efficiency of the soakaway system. This crate has a compressive strengh of 61 tonnes/ m2.We recommend that your groundwork contractor undertakes a percolation test on your soil to calculate the correct number of crates for your application.