1 clay drainage brand in the UK, with a reputation second to none for product quality, technical ability and customer service. All SuperSleve products are manufactured… Continue reading. All SuperSleve products are manufactured… Continue reading. Find Channels and Fittings for Hepworth Clay drainage system. Drainage. Hepworth SuperSleve Drainage Specification Client name – Date - Site address – 1 Manufacturer details Wavin Limited, Edlington Lane, Edlington, Doncaster, DN12 1BY . SHARE. Concrete sewer pipes dating back to Roman times have been discovered in. £25 off! Buy your plastic, steel or cast iron A15 ACO Channel Drainage here today with next-day delivery and excellent customer service - Shop ACO Drainage today!Hepworth Clay Drainage Price List 1st July 2022 SuperSleve HouseDrain vitrified clay drainage pipes. Hepworth 15° Right Hand Channel Bend, manufactured from vitrified clay. 109131338. They are shaped like a U and and can be simply clipped together. Vitrified clay channel pipes and fittings manufactured in accordance with. 8 (6) Download. Hybrid drainage. Linearis Infinity shower channel. Hepworth Supersleve Clay Drainage features high material strength, which betters the performance and life expediency of up too 100 years. long; length can be cut to size with a saw. VAT. Drainage - Soakaways. co. Superior quality stormwater residential and commercial drainage systems. Deep inspection. There is an enormous range available, from simple half-metre or metre-long polymer. PolyChannel 100% SEALED Anti-Bacteria Channel – B125 White Diamond Composite Grate. Company Registration No: 01647362. £38. Phone : 06-7431648 Mobile : 054-4678409. Hepworth Clay drainage pipes Hepworth Clay channels and fittings. 4KB: CB1-1L. Channel Drainage; Shallow Domestic Channel Drain A15; ACO Brickslot Threshold Channel Drainage; Fernco Stormdrain. The Garastor control unit can be used as a flow control device, linked to AquaCell units or a void space under the floor slab of a single residential dwelling. 50 incl VAT. wavin. Linear Drainage & Channel Drains. Aco Drive Drain - Case Study III; Aco Drive Drain - Case Study III; Aco Drive Drain - Case Study III; Drainage - A Guide to Installation;. Always available, in stock, in. uk Web: @HepworthClay. SuperSleve Channels Product Selector 10-12 HepDuct, HepLine & LandDrain Product Selector 13. Brett Martin Perforated Blown Socket Plastic Underground Drain Pipe More Options. Hepworth Clay CB1/2L Socket End 150mm Channel Pipe with 90 Degree Left Hand Bend. Foul and surface water systems. Splayed. All of our Underground products come from quality assured sources and are BS Kitemarked, BBA Certified and/or comply fully with current UK and European standards. Start searching. 50 incl VAT. Location : Shed No 18, Dar Mx Roundabout, Ajman Industrial Area 1 City : AJM P. MEALINE S Drainage Channel with Galvanised Slotted Grating 1m - A15. Select Country My PortalBrand: Hepworth Clay Drainage . Pricing group 1 - Key. Slimline Domestic Level Threshold Door Drainage ACO Threshold A15 channel drain eliminates water ponding in front of house entrances, available in either a silver or black aluminium finish. Accepts downpipe up to 110mm. long; length can be cut to size with a saw. Catch basin storm drains from NDS. Domestic Channel - Underground Drainage Supplies | Drainfast LtdTurtle Enviro Accesso 600mm Single Piece Adoptable Inspection Chamber for 150mm Twinwall - 1500mm Depth. It channels a drain into the direction of the main flow. £55. Channel Drainage. SuperSleve DN100 - 300 clay pipes fitting & gullies for use in housing, adoptable, commercial, industrial, and road drainage; Channels for use in constructed manholes; HepLine -. Bends, reducers, junctions and clay pipes. Add to Cart. This one-metre slimline ACO Threshold Drain Drainage Channel with Stainless Steel Grating is the perfect solution for preventing water from pooling around your garden patio, pathways or your home's main entranceways. Clay Drainage SuperSleve SuperSeal HepSeal Unjointed Clay Channels HepLine Land Drain HepDuct Gullies and Gratings Universal Grease Trap Plastic Drainage PlastiDrain SewerDrain Plastic Coil Land Drainage Access Systems Universal Inspection Chambers Reduced Access Telescopic PPIC Reduced Access Sewer System Manhole Covers Water Treatment Septic. Used in garage thresholds, landscaping projects and a range of DIY garden and patio applications. HepLine BS EN 295-5:2013 Vitrified clay pipe systems for drains and sewers. 1-20 of 43 items. Introduction to Hepworth Clay Hepworth Clay Vitrified clay is a well-established material for use in below-ground drainage systems. 00 ex. 0 1. End to end, everything is taken care of by Wavin - installation with a five-year. 00 incl VAT. ; Fully universal, suitable for all plastic and clay drainage from 150mm to 186mm diameter. Channels and Fittings for the Hepworth Clay Drainage system. Galco is a leading provider of surface water management systems to modern urban landscapes. Product Information. Clay Drainage Introduction Section 2 Page 4 Technical Advisory Service Tel: 0870 4435551 Fax: 0870 4435552 E-mail: info@hepworthdrainage. Hepworth Clay L/H 3/4 Section Branch Channel Bend 70° 100mm - CX1DL. 78 UK and Worldwide delivery. Download the Hepworth Clay Feature, Design and Installation Guide. WavinCoil land drain; Wavin OsmaDrain; Wavin Osma UltraRib; TwinWall surface water drainage. Hepworth SuperSleve clay drainage system comprises a range of vitrified clay pipes, bends, junctions. Hepworth Clay channels and fittings. If you have a drainage related problem will provide you, complex drainage solutions supported with reliable, durable and functional products. Bends, junctions and fittings are available in 100mm, 150mm, 225mm and 300mm diameters. pipe joint with channel to be located 100 min. 50 incl VAT. 64 inc. Select Country My PortalAlfa Channel® is a modular, pre-cast, pre-engineered polymer concrete (PC) trench drain system that has an interior channel width of 4″. Solutions; Downloads. Buy online Hepworth Plastidrain at MyTub trade counter. Hepworth Clay mini access chamber raising piece 150mm height. WebA15 Hepworth PVCU Threshold Drain Lightweight, PVCU threshold drain,. Wavin offers Osma Inspection Chambers in 250, 300 and 450mm diameters, approved to BS EN 13598-1 for shallow applications. Our broad range of linear drainage systems are designed to provide the optimum solution in surface water control. A range of plain ended or socketed channels for use in foul and surface water manholes; also as a dry weather channel in combined sewers. To which can be added the Hepworth hallmark of precision manufacturing to guarantee consistent quality, standards compliance, a complementary jointing performance and total service support. Wavin offers a wide range of deep and shallow Inspection Chambers for safe and easy. Hot and Cold solutions; Above ground commercial; Below ground drainage; Attenuation and infiltration. 65. Hepworth Building Part number . Hepworth Terracotta Product GuideClay Channels and Unjointed range – An extensive range of channels enabling almost any combination of manhole layouts to be constructed on site. Solutions; Downloads. A range of plain ended or socketed channels for use in foul and surface water manholes; also as a dry weather channel in combined sewers. Manthorpe Underfloor Vent Extension Sleeve. After this, remove the guttering and smooth any ridges in the concrete. Excavate a trench of sufficient length for the channel run to accommodate a sufficient channel bed and surround. Using a 175 mm raising piece – code SPIC4 and a seal code SPIC5 . 52 £186. The Inspection Chamber has two inlets at 45° from the main channel. Hepworth Clay offers a comprehensive range of drainage products suitable for foul and surface water drainage in adoptable, industrial, commercial and highway drainage applications. (HepFlow example used). uk. DWG: 2/19/2009: 26. Square. Drainage channels, yard and road gullies, HepGuard Stoptap Guards, Hepline land drainage, Inspection chambers. Ridgidrain is used for non-pressurised surface and sub-surface drainage applications. This channel is a drain into the direction of the main flow. Range. co. £58. Pro Series Channel Drain Kits, and each kit includes a 4-1/8 in. Hepworth Drainage Pipe Data 6-8 Slotted Pipe 9-10 Hepworth Technocore Pipe System 11-16 Hepworth Drainage Fittings 17-19 Wavin Drainage Fittings 20-24 Bottle Gully 25-26 System Design 27-32 Underground Drainage Installation Instructions 33-37 Storage & Handling 38-39 Chemical Resistance Table 40-44 Hepworth Drainage Pipe Data 6-8 Slotted Pipe 9-10 Hepworth Technocore Pipe System 11-16 Hepworth Drainage Fittings 17-19 Wavin Drainage Fittings 20-24 Bottle Gully 25-26 System Design 27-32 Underground Drainage Installation Instructions 33-37 Storage & Handling 38-39 Chemical Resistance Table 40-44 Introduction: The two most common examples of Threshold Drainage would be: Where paving meets an entrance to a building. Open Channel 6 Overpass 7 Pipe Section 7 Penstock 7 Rising Main 7 Structure 8 #936692. Manhole Backdrop . Add a 45° bend to your custom Spee-D Channel Drain layout with the Spee-D Channel Drain 45° Elbow and Grate. £77. Whether it’s domestic, adoptable, commercial or industrial drainage you are installing. co. Hepworth SuperSleve Drainage Specification Client name – Date - Site address – 1 Manufacturer details Wavin Limited, Edlington Lane, Edlington, Doncaster, DN12 1BY . com. Load class according to EN 1433 . BIM by Wavin puts a new level of productivity at your fingertips, enabling everyone in the construction chain to access the full time and cost savings of the BIM way of working. . 225x150mm channel obl junction left hand cj1/5l Hepworth Building £355. Find Channels and Fittings for Hepworth Clay drainage system. Add to basket. A range of plain ended or socketed channels for use in foul and surface water manholes; also as a dry weather channel in combined sewers. Hepworth Clay drainage system comprises a range of perforated and non-perforated vitrified clay pipes supplied complete with factory-fitted push-fit flexible couplings or plain ended with separate couplings to be fitted on site. info@theNBS. For use in constructed manholes and as a dry weather channel in combined sewers. 00 + £5. Related Hepworth Drainage Products: 225x100mm Yard Gulley Med Grate Rgp6Buy Hw Channel Brch Jnct 122 150x150mm Cj6/3 - £137. A channel is a left hand fitting when viewed from the spigot towards socket (ie. Hepworth Vitrified Clay Channel Pipe - Plain Ended 100mm. This is likely to be a fixed position, therefore if you begin elsewhere, even a minor miscalculation or. Threshold drain channel with end caps fitted with snap-out section removed Cement. Traditionally, most straight kerbs are 915mm in length (a hangover from the pre-metric days), although some of the kerb-units developed to match block-paving are only 100mm or 200mm long. 03 ex vat. 2. All SuperSleve products are manufactured… Continue reading. Sanipex Group offers an extensive range of high-quality, design-led products developed with 25 years of experience, making Sanipex Group the first choice for industry professionals and homeowners alike. Hepworth Clay RGP8 150mm Yard Gully with B125 Grating and Frame (LKL00990) Choose Your Enquiry Type Order Enquiry General Product Enquiry Technical Product Enquiry Website Enquiry General Enquiry Forums Enquiry Trade Counter Business/Marketing Employment Ask a questionThe fewer number of channels, the coarser will be the drainage pattern. uk 3Hepworth Clay drainage specification Download PDF Take a look at our other Hepworth Clay channels and fittings product ranges Fitting with 3 connections 74 variations Clay pipe 22 variations Fitting with 2 connections 129 variations All Hepworth Clay channels and fittings products. list > manufactures g-h-i > Drainage Above & Below Ground > Flexible Jointed Clay > Hepworth Building products > Hepworth Drainage: 150mm X 0. Founded almost 150 years ago, Hepworth Drainage has maintained a reputation for product quality, technical knowledge and support, and commitment to customer service. Hot and Cold solutions; Above ground commercial; Below ground drainage; Attenuation and infiltration. Prevents. Clark Drain Inspection Chamber Manhole Cover 450mm Diameter. uk; Hepworth TerracottaShowing 1 - 21 of 21 products. Important note: handing of channel and access fittings is as viewed against direction of flow. 3. This ACO BrickSlot HexDrain is a slot drain channel drainage system that seamlessly clips together and requires no additional fixings, with a 500mm mark for an easy-cutting guide. uk. Size: 1. Manufactured from recycled polypropylene, ACO HexDrain Pro is suitable for vehicle traffic up to Load Class C 250. VAT) Quick view. Against the direction of flow), the socket projects to the left. Catalog code Wavin. Downloads. Pickup in-store or delivery options. Select Country My PortalShowing 1 - 5 of 5 products. A Hepworth Clay Drainage system will withstand high water pressure jetting so that more blockages are cleared first time. Whether planning new constructions or renovations, we assess drainage systems, provide tailored solutions, and oversee installations. Hepworth Supersleve Clay Drainage feature high material strength, which betters the performance and life expediency of up too 100 years. Hepworth PME LLC is the Middle East’s premier manufacturer and supplier of plastic piping solutions. Our experts can help you, call today at 610-638-1221. Their main objective is to systemically collect and remove waste. Plastic. This ACO BrickSlot HexDrain is a slot drain channel drainage system that seamlessly clips together and requires no additional fixings, with a 500mm mark for an easy-cutting guide. The clay itself is 100% natural and recycled and meets BS EN 295-1 regulations. When you need to offer the most sustainable solutions, OsmaDrain is the only system to offer a 50% recycled pipe. The Hepworth range is comprehensive, offering a complete system for a wide range of applications. Hepworth SuperSleve 15° Bend Plain Ended 150mm. Pricing group 1 - Key. Service you would expect from a recommended trusted UK company. Side inlets – 2 no 100 mm at 45 ° - 2 no 150 mm at 90 ° Standard depth units can be raised . 6%. ACO helps you to design the correct roof drainage and to perform the hydraulic calculations with its latest, standard design. VAT Registered: GB 394 1212 63. Direction of flow is from the socket towards the spigot. Hepworth Terracotta ridge tiles; Surface Drainage. The channel has a knockout outlet to enable connection to the drainage system. Product name. Marshalls Civils & Drainage offer an extensive range of precast concrete pipes with flexible spigot and socket joints from 300mm to 1800mm to BS EN 1916:2002 Class 120, ovoid pipes and perforated pipes for use in both foul and surface water applications. It develops in regions underlain by homogeneous material. Clay has been used in drainage for more than 6,000 years. Clay Drainage Introduction Section 2 Page 4 Technical Advisory Service Tel: 0870 4435551 Fax: 0870 4435552 E-mail: [email protected] a complete range of clay drainage generally used for foul sewerage, surface water, or road. The system complements the long-established Hepworth drainage range, introducing a solvent welding jointing system for more demanding specifications. In this blog post, Paul Wydell, Product Manager for Hepworth Clay explains how health and safety considerations should be considered when planning, excavating and preparing the trench for the installation of the pipeline. News. In recent years, it has seen something of a. Hepworth Supersleve Clay Drainage feature high material strength, which betters the performance and life expediency of up too 100 years. Add to basket. Build Plumb Plastics stock a range of domestic Channel Drainage, also know as linear drainage from Fernco (Flexseal) and ACO, including the ACO BrickSlot Channel System. Eliminates the hassle of sawing a straight channel drain and grate to miter an angled turn. Hepworth Clay drainage pipes. Hepworth Clay mini access chamber base 100/110mm 215mm deep. Adaptors – PP and Channel Pipes13 100mm Diameter Access Fittings 14 SuperSleve 150 15-17 150mm Diameter Pipes and Fittings 15-16Hepworth is the Middle East’s premier manufacturer and supplier of high quality plastic piping systems for the distribution and transmission of water, waste water. 46 per U. Hepworth Clay drainage pipes > Hepworth-PP-Paved-Area-Gully-Top-100; Hepworth Clay drainage pipes. Bends, reducers, junctions and clay pipes. Hepworth Clay channels and fittings | Wavin Rainwater and Stormwater Subsurface Conveyance Hepworth Clay channels and fittings Categories Clay pipe (22) Fitting with 2 connections (129) Fitting with 3 connections (74) Product name Hepworth Clay breeches oblique junction 45° 100mm CJ5/1 Hepworth Clay breeches oblique junction 45° 150mm CJ5/3 Range. 95 incl VAT. TwinWall surface aquarium drainage tubes. Bends, junctions and fittings are available in 100mm, 150mm, 225mm and 300mm diameters. Lifetime Jetting Guarantee All products in the Hepworth Clay Drainage range are guaranteed* for the systemThreshold Channel C/W Grate BK L=1. Products & Solutions. Introduction The. AquaGrid permeable paving; Wavin Osma Domestic rain channel; Medium duty channel drainage; Heavy duty channel drainage; Garastor; Control. RRP incl. Corys Piping Systems: piping solutions for a smarter tomorrowUnderground Drainage. Clark Drain Double Sealed Manhole Cover & Frame with Steel Lid 750mm x 600mm x 50mm. Hot and Cold solutions; Above ground commercial; Below ground drainage; Attenuation and infiltration; Adoptable sewer pipe systems; Tools & Services. Threshold Drainage Tee Black Aluminium Grating £32. KESSEL on YouTube Join our community. Important note: handing of channel and access fittings is as viewed against direction of flow. 50 incl VAT. Find out how to build a drainage channel to collect surface water, and direct it to a dispersal point which leads to an existing. Setting outHepworth Clay drainage pipes; Hepworth Clay channels & fittings; Inspection Chambers. STARK Building Materials UK Limited. 11. We stock a wide range of clay pipes, junctions, couplings, and more. The offset slots allow for installation opposite walls and doors, and the concealed 10mm. Clark Drain 5 Tonne GPW Recessed Manhole Cover and Frame 580 x 580 x 54mm. £0. co. 1-20 of 43 items. Floor Drain with Cover Vertical Outlet. Transfer/Booster Pump Sets 2 products; ESPA 3 products; GRUNDFOS 9 products. £22. List of 20+ HEPWORTH dealers, HEPWORTH brand agents & distributors in UAE. Closed. Hepworth Clay square cast iron gully grid 225mm Hepworth Clay Drainage channel comprises of vitrified clay half and three-quarter section channels for use with SuperSleve drainage systems in the construction of inspection chambers and manholes. £70. VAT. Drains that only serve individual properties remain the responsibility of each householder. All connections are 110mm. Downloads. AquaGrid permeable paving; Wavin Osma Domestic rain channel; Medium duty channel drainage; Heavy duty channel drainage; Garastor; Control. Find and specify drainage gullies and channels from top manufacturers with NBS Source. Polypipe – PolyStorm. View Product. 40, Sch. Catalog code Wavin. The threshold is only 60mm wide and sits flush to the door for maximum discretion,. Just follow this simple step-by-step guide. We also supply a variety of accessories including channel. Its design is also perfect to sit flush with the door ensuring subtlety, as well as quick and efficient drainage. Hepworth SuperSleve HouseDrain Pipe Plain Ended 100mm x 1. Hepworth Clay drainage specification Download PDF Take a look at our other Hepworth Clay channels and fittings product ranges Clay pipe 22 variations All Hepworth Clay channels and fittings products Solutions. B125 weight load class rating ideal for light vehicular traffic. - via a new branch junction or access chamber to an existing pipeline. Plumbing Systems. co. Direction of flow is from the socket towards the spigot. Useful resources. Add to basket. B125 Drainage Channel (125kn) Cast Iron Grate B125 Drainage Channel (125kn) Galvanised Grate B125 Drainage Channel (125kn) Plastic Grate How do I install a Hepworth domestic channel drainage system? Hepworth Domestic Channel Drainage Systems have been designed for quick and easy installation. Side inlets – 2 no 100 mm at 45 °. Inspection Chambers. Add to basket. Hot and Cold solutions; Above ground commercial; Below ground drainage; Attenuation and infiltration; Adoptable sewer pipe systems; Tools & Services. 100OC510. 50mm, 75mm, 100mm, 150mm Optional. The clay itself is 100% natural and recycled and meets BS EN 295-1 regulations. Our new range of inspection chambers to BS EN 13598 can be used in these scenarios. Main Material . co. Technical data: Material - Clay. Compensation Basin Drainage storage basin. Product Type. WavinCoil land drain. £650. StormForce Terms and Conditions of Sale. ; Fully universal, suitable for all plastic and clay drainage from 150mm to 186mm diameter. Cast Iron Manhole Cover and Frame 600L x 600W x 150H - F900 Loading. Hepworth Clay breeches oblique junction 45° 100mm CJ5/1 Hepworth Clay breeches oblique junction 45° 150mm. That is, the subsurface geology has a similar. SuperSleve products are suitable for foul and surface water drainage in adoptable, industrial, commercial and highway drainage applications. Main channel – 150 mm . Select Country My PortalDrainage - Hepworth Clay. Description. Add to basket. Hepworth Clay drainage system comprises a range of perforated and non-perforated vitrified clay pipes supplied complete with factory-fitted push-fit flexible couplings or plain ended with separate couplings to be fitted on site. ’HEPWORTH’ CODE SPIC2/1 595 DEEP - 5x100 INLETS ’HEPWORTH’ CODE SPIC1/2 1030 DEEP - 2x100 + 3X150 INLETSHepworth Clay drainage system comprises a range of perforated and non-perforated vitrified clay pipes supplied complete with factory-fitted push-fit flexible couplings or plain ended with separate couplings to be fitted on site. Grassed channels generally treat smaller drainage areas of 1 acre or less. 00 incl VAT. Zurn Industries Z165 8-3/8" Diameter Combination Main Roof and Overflow Drain with Low Silhouette Domes and Double Top-Set® Deck Plate. Select Country My PortalSelect Country My PortalHarper Precast has a line of culverts that range in size, design, and capabilities. 00 incl VAT. Add to basket. - via a new branch junction or access chamber to an existing pipeline. ACO HexDrain Pro comes complete with a corrosion resistant black composite Heelguard grating, ideal for pedestrian traffic. Last updated 7 January, 2014 draindmain. wide, 3-3/4 in. Telephone 0844 5561818 calls are charged at 7p per minute PLUS your telephone network will charge you which can be significant. Channels. Standard Drain Channel (£8. Unable to display product guides and articles. Suitable for domestic properties where subtle appearance is designed. The channel comes complete with an offset slotted grating, ideal for block paving up to and including. Zurn Industries Z125 8-3/8" Diameter Roof Drain, Low Silhouette Dome. Showing 1 - 21 of 21 products. End outlets are standard, but if you need to disperse large amounts of water, take advantage of the bottom outlets. Introduction to Hepworth Clay Hepworth Clay Vitrified clay is a well-established material for use in below-ground drainage systems. Wavin OsmaDrain. 5 hours ago. Select Country My PortalDescription. On this page, methods 3 and 4 are the main focus; methods 1 and 2. Bends, junctions and fittings are available in 100mm, 150mm, 225mm and 300mm diameters. Typical uses include driveways, pools, walkways, and wherever excess water and erosion are a problem, yet adds an aesthetic touch it. com. Domestic, adoptable, commercial or industrial drainage. Subsurface Conveyance. Features & Benefits: For use with the SuperSleve drainage system in the construction of inspection chambers and manholes 1m length. The Hepworth 15° Right Hand Channel Bend 100mm (Dia) Brown is manufactured from vitrified clay. 00. ACO crafts the future with cutting-edge technology, sustainable water management practices, and. Product Type: CLAY SQUARE GULLY: Size: 100MM: Brand: Hepworth: Product. Drainage systems are intended to dispose of wastewater as quickly as possible, while also preventing the gases from sewers and septic tanks from entering residential locations. General enquiries: 0345 456 9594. All SuperSleve products are manufactured… Continue reading. high, and 10 ft. askACO - askACOHepworth Clay provides a range of drainage systems combining secure jointing with ease of. - Clay traps: Supplied complete with filter basket, spatula, cover and frame and 100/110 conversion adaptors. Channels, gullies and Inspection Chambers available in a range of sizes. How to install drainage channel grate the easy way. Drainage. . Delta Cavity Drain - Sacrificaial Screed 110mm Channel Outlet DW-282-1-(C) Channel + Modular Drainage Complete Set Up Detail - Delta Dual Sump V3, 4 or V6 + Delta HLAChannel drain installation could be completed in a few simple steps. 00 £0. The ACO Drainlock grating has a bar-less locking device, allowing for quick and simple installation of. Drainage refers to the method of removing surface or sub-surface water from a particular area. Hepworth PME LLC, based in Dubai, has been manufac-turing and marketing pipes, fittings and related products in the Middle East, for more than 40. Add to basket. 25dg Right Handed Clay Channel Socketed Pipe Bend. Bends, junctions and fittings are available in 100mm, 150mm, 225mm and 300mm diameters. Connect It. Select Country My PortalCorys Build Centre provides an integrated, multi-channel approach to the building materials sector. Hepworth SuperSleve Channel Pipe 225x1000mm ; Hepworth SuperSleve Channel Pipe 225x1000mm. Hepworth Clay drainage system comprises a range of perforated and non-perforated vitrified clay pipes supplied complete with factory-fitted push-fit flexible couplings or plain ended with separate couplings to be fitted on site. Drainage Channel Solutions. £58. The Supersleve drainage system is. Polypipe below ground drainage systems are: Compliant to Sewerage Sector Guidance for England, Sewers for Scotland and the Welsh Minister Standards for Sewers. Clay’s main benefits are its durability and longevity. It’s the very first twinwall surface water drainage system in the UK with Highways Authority Product Approval Scheme (HAPAS) status (up to 900mm). Clay’s main benefits are its durability and longevity, plus it has a good environmental profile from a raw material through manufacturing, installation, in-use to.