AC4000 Fernco / Flexseal adaptor
£ 6.57 plus VAT
Fernco / Flexseal AC4000 adaptor coupling for joining drainage pipes of different outside diameters and materials, including plastic, concrete and clay. Connects 121-136mm pipe to 110-121mm pipe with an EPDM rubber sleeve and two stainless steel clamping bands, for a watertight, airtight seal.
Description
Fernco AC4000 Adaptor Coupling: Seamless Connections for Varied Pipe Systems
Seamless Connections for Varied Pipe Systems The Fernco / Flexseal AC4000 Adaptor Coupling is the essential solution for confidently joining drainage pipes with varying outside diameters and material types. Engineered for both efficiency and durability, this adaptor provides a permanent, watertight, and airtight seal, making it ideal for a wide range of drainage applications. Other diameters and specifications are available from Cartmore stock.
Key Features:
- Universal Compatibility: Designed to connect pipes of different materials, including plastic, concrete, and clay, bridging the gap between traditional and modern pipe systems.
- Variable Diameter Connection: The AC4000 specifically connects pipes with an outside diameter of 121-136mm on one end and 110-121mm on the other, making it a perfect “reducer” or “adaptor” for non-standard pipe configurations.
- Robust Construction: Manufactured with a stepped, moulded EPDM rubber sleeve for flexibility and resilience, coupled with two high-grade 304 stainless steel clamping bands for a secure, long-lasting grip. (Note: Some variants may feature 316 stainless steel for enhanced corrosion protection, or nitrile sleeves for hydrocarbon resistance).
- Quick & Easy Installation: Simple to fit, requiring only a nut driver and torque wrench to tighten the bands and achieve a reliable seal in seconds.
- Airtight and Watertight Seal: Once installed, it forms a robust connection that prevents leaks and ensures the integrity of your drainage system.
- Durable Performance: Resistant to weathering, frost, and fading, with a pressure rating of 0.6 bar (8.70 psi) and a temperature range of -50°C to 80°C (constant), up to 100°C intermittently.
- Cost-Effective Solution: Offers an inexpensive and efficient alternative to using traditional bushes or complex pipe adjustments.
- Tried and Tested Reliability: Backed by Fernco (formerly Flexseal’s) extensive experience in flexible couplings for over 30 years.
Ideal For:
- Connecting pipes in unadopted or private drainage systems.
- Housing developments and private roads.
- Industrial sites and agricultural land.
- Repairing existing pipework with different diameters.
Choose the Fernco / Flexseal AC4000 Adaptor Coupling for a simple, versatile, and highly effective solution to your diverse pipe connection needs.
Who are Cartmore?
Cartmore Building Supplies, established in Lochgelly, Fife in 1986, has grown to become Fife’s largest independent builders’ merchant. With branches conveniently located in Lochgelly and Denny, we offer a top-class service complemented by quick and efficient deliveries from our own fleet.
We are unique among builders’ merchants due to our own bagging, blending, and washing facilities, which allow us to create a distinctive range of decorative aggregates and roughcasting chips. Our extensive product range includes heavy-side building materials such as landscaping materials, concrete blocks, bricks, roughcasting supplies, gravels, sand, drainage, timber, insulation, and tools. We are proud to supply a wide range of building materials to both trade and public customers, serving as a major supplier to many of the UK’s largest housebuilders and working closely with Scotland’s regional developers.
Our branches feature extensive hard landscaping displays that set a high standard in the UK sector. Cartmore is an award-winning company recognised for excellence in the UK.
We also operate Scotland’s first Fibo Collect, concrete, mortar, and screed production facility at Lochgelly. Cartmore Building Supplies isn’t just another builders’ merchant—we are your complete, independent building supply partner. Contact us for more information!




