hepworth threshold drainage. Hepworth Clay Drainage Fired to Perfection HEPWORTH CLAY & TERRACOTTA. hepworth threshold drainage

 
 Hepworth Clay Drainage Fired to Perfection HEPWORTH CLAY & TERRACOTTAhepworth threshold drainage  However, the variance ratio of the elevation and radiation reaches a plateau with the drainage area around 10 6 m 2

Hepworth. Wavin Group Hazelhead Crow Edge SHEFFIELD S 36 4HG. PRODUCTS . Download. Your shopping basket (0) Clear All Sub total. Hepworth Clay offers a comprehensive range of drainage products suitable for foul and surface water drainage in adoptable, industrial, commercial and highway drainage applications. Pricing group 1 - Key. Conforms to the Harmonised European Standard: BS EN 295-1:2013 . 4KB: CB1-1L. View trade pricing and product data for Hepworth - Clay, SPIC1/2 Chamber, Inspection 150/160mm PPIC 3 Inlets, & 2 Inlet Stoppers, Universals Clay or Plastics, Universal Access Systems. £14. In this video, we will show you how to properly install drainage and thresholds in your home. Pipe sizes range from 13 mm to1000 mm. DECLARATION OF PERFORMANCE - CPR . The higher part will be edged on one side by the existing house wall. Product Details Type: Single Towel Bar Wall Fastening Includes Screws and Dowels Color: Chrome Article Number: 21001+ URAK21001+KLURAK21001+Perforated land drainage pipes used for surface water collection from highways, playing fields, sports grounds, forestry and waste tips and for general drainage. Add to basket. 91 Kv: 923 Article Number: PG112153 Product Description Complies with BS EN 1171:2002 standard Flanged to EN1092-2 PN16 pressure rating for all sizes Made of ductile iron material Bronze (gunmetal) seat and trim Stainless steel stem Non-rising stem design Ductile iron body. Outer pipe diameter connection 1 . Explore our growing range of drainage solutions, from our popular A15 linear or edge slot drain channel systems to our Eezee B125 and C250 channel drainage. Hepworth SuperSleve inspection chambers are supplied complete with multi inlets to connect directly to SuperSleve pipe systems, any or all inlets can be easily adapted to Plastic drainage systems with the adaptor provided. The drainage area threshold value is the minimum drainage area. 00 – £ 55. Transfer/Booster Pump Sets 2 products;. 98 Inc. 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. 5027888023025. 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. blue and black pipes that are included. e. Hepworth Clay Product Design and Installation Guide . HexDrain . Hepworth Clay mini access chamber base 100/110mm 215mm deep. The unique properties of UPVC make Hepworth Watermain pipes, 3820) joints and bends an ideal choice where potable water or other liquids. 2 23m ROOF PLAN Determine outlet positions: Underground drainage schemes will permit two downpipes to be used. Hepworth Clay channels and fittings Product name. See current trade price list for full details. Blue. 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. Add to Basket. Vertical Outlet Connector 110mm - 11285 . Add to basketTo which can be added the Hepworth hallmark of precision manufacturing to guarantee consistent quality, standards compliance, a complementary jointing performance and total service support. Made of flexible PVC their durability causes them to be suitable for above-ground or. Welcome to Wavin UK. Wavin Osma Domestic Rain Channel is a surface drainage system that can handle light to medium traffic loads. 1 clay drainage brand in the UK. DWG: 2/19/2009: 26. Hepworth PP Paved Area Gully Top 100. Load Class A 15 . Location : Shed No 18, Dar Mx Roundabout, Ajman Industrial Area 1 City : AJM P. Wavin Osma Domestic Rain Channel is ideal for driveways, patios, gardens and other domestic applications. Hepworth Terracotta Price List (TE101) 1st Apr 2023 HEPWORTH CLAY & TERRACOTTA. £51. View our huge range of competitive Ducting, Soakaway Crates & Drainage Pipes online. Hepworth SuperSleve inspection chambers are manufactured under a. 00 incl VAT. 5 Inch Square Rainwater Mini Offset Sp22-w : 2. Range. Backed by more than 60 years of product development experience, the business is tackling some of the world’s toughest challenges through pioneering in water and sanitation management, indoor climate control. * Note: In the interests of good drainage practice this distance should not exceed 12m. 349 of 1989), or a provision amending or replacing that Article, but for not exceeding a. Vitrified clay pipes for drains and sewersProduct Details: Brand: Milano Area for Installation: Kitchen Article Number: 140100300372 Product Description: Experience the highest quality and durability with our product molded from high-grade material. Bends, junctions and fittings are available in 100mm, 150mm, 225mm and 300mm diameters. The selection of a threshold drainage area is challenging, with considerable effort being expended on identifying techniques to constrain it 38. 00 – £ 55. £6. 27 £14. £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 from Wavin is the No. Clay 150mm x 1. Lightweight and easy to fit, HepFlow Polymer Concrete gives installers a wider choice when specifying applications for domestic driveways and pedestrian areas around residential properties. Soil pipes. 00 ex. Clay is a future-proof material, 100% natural and 100% recyclable. Phone : 06-7431648 Mobile : 054-4678409. Hepworth spent two decades marketing and supplying UK upvc pipes and fittings. However, the variance ratio of the elevation and radiation reaches a plateau with the drainage area around 10 6 m 2. charts. STARK Building Materials UK Limited. The drainage area above each gully was measured on maps, and valley slopes were surveyed in the field. Part three of this four-part series sees Rob Butcher, Design Service Manager at ACO Water Management examine the key considerations landscapers need to incorporate into their plans when installing. Hepworth Clay Drainage Price List 1st July 2022 HEPWORTH CLAY & TERRACOTTA. Range. Our range of channel drains and gullies help you manage surface water efficiently by collecting and transporting excess water on roads, car parks or industrial sites. Filters. Feb 17, 2020 — Wavin has launched its new Hepworth Clay specification and design guide, aimed to support designers and specifiers in choosing drainage. 00 : R12 Drainage Below Ground - Plastic/Metal Type Pipes & Channels. Sheffield S36 4HG . 00 : Hepworth Supersleve 150 Bend Plain Ended 150mm x 30 Degree: Nr £ 31. Hepworth Drainage Catalogue Pdf - Find your favorite catalogs from brand-name merchants specializing in the latest fashions, home decor items, gifts, and garden seeds and plants. Published [27/03/2017] File size [207 KB] Download document from HEPWORTH CLAY & TERRACOTTA - Pipe Couplings, Surface Water Drainage, Vitrified Clay Ducting, Vitrified Clay Drainage Pipes, Surface Boxes, Land Drainage, Stop Tap Guards, Clay Drainage Systems, Masonry Saw Blades - on BPi. Depending on the type of gully, they can be used to connect. HepFlow® Linear Drainage - polypropylene channel drainage system. Linear channel at doorway threshold. 77. Inspection Bathrooms. Domestic Channel - Underground Drainage Supplies | Drainfast LtdThese CAD drawings have been prepared by Hepworth - Wavin and do not necessarily conform to standard FastrackCAD drawing and layering conventions. At present, about 299 Mha (or 18%) of the arable and permanent cropped areas worldwide are irrigated and, although drainage is an important component of irrigation, only 22% of these irrigated lands are drained. sticks. Please note that these systems are not interchangeable. Find and specify drainage gullies and channels from top manufacturers with NBS Source. Hepworth Clay Product Design and Installation Guide . 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. 6m x 100mm Brown: Brand: Hepworth Clay: Manufacturer Name: Wavin: Manufacturer Part Number: SP1: EAN: 5027888019844:Hepworth SuperSleve clay drainage system comprises a range of vitrified clay pipes, bends, junctions and fittings available in 100mm, 150mm, 225mm and 300mm diameters, supplied complete with factory -fitted push-fit flexible couplings or plain ended with separate couplings to be fitted on site. Accessible / Level Threshold. 450 mm. Hazlehead Site, Crow Edge . They are also suitable for use in septic tank effluent dispersal in housing developments. PDF - 59 KB. The present meta-analysis showed that increasing the daily threshold of 300 ml before removing the CT significantly decreased the duration of CT drainage and the hospital. 50 incl VAT. 15. AutoCAD Drawing Created Size Preview PDF Drawing; CB1-1L. Hepworth HDPE Pressure Pipes Polyethylene Pipes and Fittings. Size: 100mm, Finish: Vitrified Clay, TSI Code: 9783933. Our extensive range includes ACO HexDrain, ACO RainDrain, and ACO. Ajman Phone: +97167676337 Fax: +971564039493 shaheer@buildlineuae. Series 5010 Window Washing System Leaflet pdf. 6m x 100mm Brown. , 2006). CE marked and kitemarked to EN 295. Hepworth Clay inspection chambers are manufactured under a Quality Management system to BS EN ISO 9001. All HepSure™ couplings utilise worm drives and clips, akin to the. The competition constraints operating at each of these levels are analysed. E: [email protected] – £ 52. As a consequence, salinity and waterlogging problems affect about 10–16% of these areas because the natural. Add to basket. POLY16 COMPRESSION. ACO Eyeled Lighting Cable Splitter - 300mm x 300mm. 75 Inc. PDF: CB1-1R. PLUMBING TRADE ESSENTIALS. SUPERSLEVE BEND £ 35. W hen such a network is mapped one observes . Foul and surface water, private drains and public sewers, land drains and soakaways, filter drains and any other ways of getting rid of water. 1 clay drainage brand in the UK, with a reputation second to none for product quality, technical ability and customer service. Whether you’re installing for a domestic or commercial project. A range of clay pipes and fittings suitable for foul and surface water drainage in adoptable, industrial, commercial and highway drainage applications. Tarboton and Ames (2001) present ways to objectively delineate drainage networks from digital elevation models that respect this distinction between hillslopes and channels. Linear Channel Drainage is one of the most popular options for use with paving projects. In humid and sub-humid regions, drainage removes excess water reducing the risk of crop failure and increases farmer's freedom of crop choice and varieties. In recent years, it has seen something of a. Get quality UPVC/PVC/HDPE pipes & fittings for low cost from top Hepworth traders & wholesalers in UAE. manufactured to BS EN 1452-2:2000 (kitemark License number. manufactured to BS EN 1452-2:2000 (kitemark License number. Soil pipes, also known as soil vent pipes, are used to transport wastewater and sewage into the sewer. 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. Clay 150mm 15 degree Plain Ended Drainage Bend Hepworth SuperSleve 150 SB4/2. 2 Pages. Drainage & Sewerage Systems - 06 HDPE Soil Waste and Vent Application - 07 HDPE &MDPE Pressure Pipe & Fittings Systems - 08 uPVC Duct and Pipe Accessories - 09. 00 £. Telephone 0844 5561818 calls are charged at 7p per minute PLUS your telephone network will charge you which can be significant. Domestic Channel - Underground Drainage Supplies | Drainfast LtdBends, junctions and fittings are available in 100mm, 150mm, 225mm and 300mm diameters. £65. 20% VAT) ( £32. View trade pricing and product data for Hepworth - Clay, SG2/1 Gully, Square c/w Grid, Clay, SuperSleve HouseDrain. £24. . Manufactured from 100% recycled black polypropylene, the highly successful 1m ACO HexDrain channel has been combined with a new offset slot cover specifically designed for slab and block paving, to create ACO. PDF - 2 MB. The higher part will be edged on one side by the existing house wall. Classification Pr_65_52_24. HepFlow® Linear Drainage - polypropylene channel drainage. Hepworth Threshold Slot Drain. Hepworth Clay SuperSleve HouseDrain EPD for. As part of the ACO Threshold range of channel drainage, you can fit the end cap to a channel suitable for domestic properties at external doors; eliminating water pooling at this location. 48 £ 38. Wavin Osma is the reference for residential and commercial drainage systems. Howard (1994) considered a threshold on the gradient divergence normalized by mean gradient. TwinWall surface aquarium drainage tubes. A range of clay pipes and fittings suitable for foul and surface water drainage in adoptable, industrial, commercial and highway drainage applications. uk Certification BSEN 295-1 Kitemark certified Agrement Certificate 02/3884 (100 & 150 mm only) Pipe dia Crushing strength / Class no – 100 mm. Hepworth Clay. Clay, one of the oldest and most sustainable pipe materials, remains a popular choice for drainage specialists. Hepworth Clay SuperSleve 225 EPD for SC1/5 . Threshold Drainage Corner Black Aluminium Grating £24. SA10. The undersigned representing the following: Wavin Ltd . The UK's leading manufacturer and supplier of plastic drainage piping solutions for above and below ground projects. Previous EC1 and UK2 cases in this sector have defined product markets by reference to material and application. 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 clay land Drainage Pipes are Kitemarked to the requirements of BS 1196. 93 £ 32. Download. An accessible threshold is defined as a threshold this is level or, if raised, has a total height of not more than 15 mm, a minimum number of upstands and slopes and with any upstands higher than 5 mm chamfered. Zurn Industries Z8700 - Z8708 P-Traps with Wall Bend. 00 incl VAT. SourcedThe new patio will be on two levels - a higher area which is level with the threshold of the bifold doors, and a step down to a lower level which is level with the existing patio. 80 inc. Bends, junctions and fittings are available in 100mm, 150mm, 225mm and 300mm diameters. Clark-Drain New Style Plastic Channel End Cap and Outlet Set 128 x 117mm. 07 2093. Osmachannel 100OC460 Plastic End Plate. More information Update company details. Hepworth Clay HepLine LP200/4 EPD. O Box: 150227. All external doors to have a level threshold with a proprietray drainage channel (eg. Conforms to the Harmonised European Standard: BS EN 295-1:2013 . Clay has been used in drainage for more than 6,000 years. 2. Probably all of a muchness. Size: 100mmx1. 25 £5. HexDrain B 125 . £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 from Wavin is the No. 1. Roddable Foul Air Trap 160mm -11192 . DWG: 2/19/2009:. Wynn 2000 Series Controller. Delivery or pick up local to you Hepworth Drainage from a highly recommended trusted company. PDF - 1019 KB. Showing 1-36 of 47. Add to basket. Open the catalog to page 2. The undersigned representing the following: Wavin Ltd . Hepworth Clay Product Design and Installation Guide . Touch device users, explore by touch or with swipe gestures. The Hepworth Clay SPIC1/1 100mm/110mm PPIC Polypropylene Inspection Chamber Base is a lightweight solution for private drainage systems that can be installed quickly and easily with no need for wet trades or lifting equipment. Drain and Sewerage Systems Underground drainageDUBAI, UAE, 29 August 2021: As part of its growth strategy across MEA, Hepworth, which manufactures piping systems solutions, recently launched its DACTA range of solvent-weld, u-PVC, above-ground drainage systems (DACTA Drainage) and PP-R piping systems (DACTA Therm) to broaden its reach to the building construction sector. Threshold Channel A lightweight and unobtrusive domestic channel available with end caps, drain outlet and a removable grid to enable easy cleaning. Hepworth Clay Product Design and Installation Guide . A grid of local curvature is used as a weight grid in a drainage area accumulation function with a support threshold to delineate the channel network and watersheds. drainage@hepworth. Direct download. Hepworth SuperSleve 300 - Foul water drainage . 6m, Finish: Vitrified Clay, TSI Code: 9785371, EAN Code. Garden Paving. The threshold is only 60mm wide and sits flush to the door for maximum discretion,. 16 Inc. View trade pricing and product data for Hepworth - Clay, CJ3/3 Junction, Socketed Double Oblique 45Deg, Clay, Clay Channels Plain Ended & Socketed. 75. PDF: CB1-1R. Main Material . Hepworth Clay offers a comprehensive range of drainage products suitable for foul and surface water drainage in adoptable, industrial, commercial and highway drainage applications. New Hepworth flexible couplings range; Al-Vac introduce handy vacuum lift;. Telephone 0844 5561818 calls are charged at 7p per minute PLUS your telephone network will charge you which can be significant. Direction of flow is from socket towards the spigot. Hepworth SuperSleve HouseDrain - Foul water drainage | Wavin Ltd | NBS Source. . Add to basket; Threshold Luxe 60 – Corten Steel Safeheel Slotted Grating £ 32. Shallow inspection chambers. Park, Harry Weston Road, Coventry CV3 2TT. Technical Instruction Hepworth Clay pipe weights and dimensions. The drainage network density and the threshold value also shows a trend of power function y = ax b ; the value of b is usually 0. Benefits of Hepworth Clay Sustainability – Clay pipes have low embodied CO 2, with a true cradle to cradle pedigree, including low environmental impact in raw material sourcing,. Ideal to be. Our Price: £26. Add to basket; Threshold Luxe 60 – Silver Aluminium Safeheel Slotted Grating £ 26. Skip to the end of the images gallery . Socketed channel system for use in manholes on commercial, industrial and adoptable drainage including gullies. and lengths of 150 m coils to 12 m long. Drainage. Handing of channel and access fittings is as used against direction of flow. Our concrete drain channels come in a range of styles, including. Buy online Hepworth Drainage at MyTub trade counter. Twenty high quality Channel Drainage systems in durable HDPE, available with black HDPE gratings or with galvanised steel gratings. Marshalls’ concrete drainage channels offer both durability and efficiency in essential water management projects. Compared to no drainage or other drainage systems used over the years, Heelguard Threshold Drainage can amplify the aesthetics of any property drastically without hurting the pocket. Compare . correctly installed it has a lifetim . 80 (Exc. One of the UK's most trusted and leading names in plastic drainage systems. drainage, clay would be the product you’d invent. PG2. Buy Threshold Drain Jointing Piece Tdjp - £5. 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. Main Material . HEPWORTH - Drainage & UPVC Fitting. ’hepworth’ code spic2/1 595 deep - 5x100 inlets ’hepworth’ code spic1/2 1030 deep - 2x100 + 3x150 inlets ductile iron cover & frame ’hepworth’ code spk8 - 475mm round ’hepworth’ code spks8 - 525mm square 225mm concrete plinth to support finish 470 well compacted bedding material used as backfill raising pieces ’hepworth’ codeCorys Piping Systems: piping solutions for a smarter tomorrowDescription. Removable aluminium grate. co. 20 15 SB2/2 45° Bend – Plain Ended 15 29. Hepworth is the No. UltraRib systems are designed for use in gravity drainage and sewerage installations at depths of up to 10 metres. Threshold Drain x 1m Aluminium Grate. Service you would expect from a recommended trusted UK company. Lightweight and. co. 0 (8) Download. 150. Dec 5, 2016 - Explore ALE's board "threshold drainage detail" on Pinterest. VAT. Skip to the beginning of the images gallery . In arid and semi-arid regions, drainage can prevent waterlogging and root zone salinity in irrigated lands. By butting the L-shaped channel up against the exterior footing of a building it creates a surface to pour the concrete up against. Drainage. 2. 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 years. lutonlagerlout Site AdminDec 5, 2016 - Explore ALE's board "threshold drainage detail" on Pinterest. 76: Unjointed 14 Bend 100mm 45 Deg Rb2/1. All HepSure™ couplings utilise worm drives and clips, akin to the. The unique properties of UPVC make Hepworth Watermain pipes, 3820) joints and bends an ideal choice where. 00 £ | Meters drain channel: 20. Clay is a 100% natural and plentiful raw material. Range Hepworth Clay inspection chambers are supplied complete with multi inlets to connect directly to SuperSleve pipe systems, any or all inlets can be easily adapted to plastic drainage systems with the adaptor provided. L. Jul 22, 2021 — 10 design. Vat. Diameter . However, the game selection is low and the payout speed is inconsistent. Our fantastic range of drainage supplies includes products designed to support above and below ground applications. These products include EN1401-1/ BS4660:2000 Underground Drainage Pipe and drain pipe fittings in 110mm, 160mm, 200mm, 250mm,. PlastiD Temporary Manhole Cover 600Sq YL. 3. 4KB: CB1-1L. 5027888012760. View trade pricing and product data for Hepworth - Clay, SH3/2 Hopper, Integral Inlet c/w Plastic Grid, Clay, SuperSleve 150. Supplied in standard industry specification our leading manufacturer products are interchangeable with each other. View trade pricing and product data for Hepworth - Clay, SG2/5 Grid, Spare, Clay, SuperSleve HouseDrain. SUPERSLEVE BEND £ 35. In this case, the leading edge of the threshold sill should be rounded or chamfered to assist the transition for wheelchair users. Supply; Bed & Joint : 110mm Drainage Pipe: mFilters. All rainwater falls down the glass and good patio doors already come with built-in drainage helping move any water away. The channel comes complete with an offset slotted grating, ideal for block paving up to and including 60mm. 2000 . 2. The Supersleve drainage. Model: TD400. Suitable for use with Hepworth Clay Supersleve drainage systems but can be converted for 110mm plastic piping with the. Clay. VAT Registered: GB 394 1212 63. Range The Hepworth domestic channel drainage range consists of: HepFlow® Linear Drainage - domestic polymer concrete drainage system. The Hepworth range of domestic channel drainage products offers a complete and integrated surface water drainage systems for all domestic applications. Hepworth PME was established in the UAE in 1974 with it's head office in Dubai. £0. Hepworth Clay is a brand from Wavin. Georg. Products Shop Building Hepworth Clay Drainage. Drainage and Ducting. Deep inspection chambers. It is easy to install, durable and compatible with other Wavin products. Catalog code Wavin. 63 UK and Worldwide delivery. A range of clay pipes and fittings suitable for foul and surface water drainage in adoptable, industrial, commercial and highway drainage applications. Hot and Cold solutions; Above ground commercial; Below ground drainage; Attenuation and infiltration. Supported by a CE Mark and Declaration of Performance (DoP) certificate. They can act as drainage channels, directing surface water to a suitable disposal point. Underground Drainage Damp Proof Membrane/Radon Barrier Flexible Couplings Channel Drainage - A15 Channel Drainage - Aquaflow Drainage Channel - Flexseal Stormdrain Plus - Low Profile Channel Drainage - Linear Grate A15 Channel - Threshold Drain - B125 Drainage Channel (125kn) Cast Iron Grate - B125 Drainage Channel (125kn) Galvanised Grate. See more ideas about drainage, drainage solutions, paving design. Bramley. 32 Inc. P. Typical application: linear channel drain at garage door threshold. VAT £28. Wavin Ltd Third party certifications: QA Certificate . But ideally I want something that: 1) is domestic - no holes that are going to trap heels etc. This enables sustainable installation on site using recycled aggregates, and rigorous maintenance regimes in service. In Stock. 92 448. Box 50207, Mesaieed, Qatar Tel: +974 44760588 Fax: +974 44760525 OMAN ABDUL GHAFFAR. Roof Drainage > Hepworth Terracotta ridge tiles > Hepworth-Terr-Cap-A-Rge-Blue-115°-L=0. 63 ex. At Buildbase we work closely with leading industry manufacturers and suppliers ACO to supply a wide range of high-quality and competitively priced channel drains, brickslot drains, threshold drains and grates, including the popular ACO RainDrain. Category. Royal Ace Casino is very good at attracting new casino players with some strong promotions, such as a no-deposit bonus, reasonable wagering requirements, and an uncapped deposit bonus. Bends, junctions and fittings are available in 100mm, 150mm, 225mm and 300mm diameters. Hepworth Clay mini access chamber raising piece 150mm height. A range of clay pipes and fittings specifically developed for housing drainage but also suitable for foul and surface water drainage in adoptable, industrial, commercial and highway drainage applications. Hepworth Clay offers a comprehensive range of drainage products suitable for foul and surface water drainage in adoptable, industrial, commercial and highway drainage applications. The threshold drainage ditch spacing (L T) is defined as the largest spacing that would remove wetland hydrology from the entire field. Manthorpe G930 Combination Airbrick. Our range of drainage materials and equipment for water channelling include drains, sewers, pipe couplings, manhole covers and chambers. Modern properties tend to have two separate drainage systems installed - the foul water system collects the kitchen and bathroom wastes for processing at the local effluent treatment plant whilst the surface. 85 15 SC1/2 Coupling 100 14. 25. 06 per U.