30 Incl Tax: £23. Drain for shallow water drainage. Designed for doorways up to 1000mm, but multiple channels can be run. Afterwards, connect your drain pipe to the end drain outlet. Its stylish yet strong design and user-friendly features make it perfect for installation by both professionals and DIYers with results you’ll always be happy with. Channels for 36-inch and Larger Diameter Sewers. Drainage channels are designed to be used to provide drainage solutions for surface water on driveways and patios and around garage and conservatory entrances and exits. Supplied in 1000mm lengths, Polydrain is a shallow channel drain that includes a range of accessories that creates versatile system that is both fast. A channel drainage system designed for heavy-duty applications (F900), such as public car parks, petrol station forecourts and industrial sites. If the concrete is stiff enough, and the concavity you desire is shallow enough, you could form it simply by drawing a curved screed board along the length. Zurn Z817 Fiberglass Catch Basins. Whether installed in the yard or the basement, a French drain works on the same principle. 4 in. Mifab Series Shallow Trench Drain is a T275, 4 3/4” wide, 2 ¾” deep, 40” long, non sloped trench drain system. Click the grating in and out, no screws required. (Max 10000) ADD TO BASKET. Our Micro channel drain sections snap together easily to make installation fast and simple. Channel drainage is a key point in the management of surface water intercepting and conveying water to the next phase of it’s journey – a journey that has to be carefully and properly managed through cleaning, infiltration, attenuation and release. 242 Spee-D Channel Grate Green. Drain shall be 3 [76] deep. Different channel widths:: 100-150-200-250-300; No profile or with galvanized or stainless steel profile; Gratings available in stainless, galvanized steel or ductile cast iron with various grating fastening systems PolyDrain® is a drainage channel made in modular, pre-sloped sections from polymer concrete. Standard Products KlassikDrain PowerDrain SlabDrain 2. 70 (£17. 4 3/4" Wide Zurn Z884 Trench Drain Kit 93 Foot Complete. The Zurn Z884 4-3/4" wide trench drainage system. Grates are locked with easy to use boltless mechanisms. Sump Boxes. The company offers various drainage systems specifically designed to manage stormwater runoff, protecting people from hazards and properties from potential damage. 5" Pro Series Light Duty Galvanized Grate & Channel Kit. 00 incl VAT. Shallow drainage channels are ideal when excavation depths may be limited – for example when services are located unusually close to the surface or where sub-soil drainage would be impeded. Add to basket. They’re often installed around a patio, driveway or garden to prevent flooding caused by rainwater. 99Inc Vat. Follow answered Oct 13, 2012 at 10:29. Stormtech created a world first by developing the linear grate and drain system for bathrooms. Find out how to build a drainage channel to collect surface water, and direct it to a dispersal point which leads to an existing. NDS channel and trench drains are designed for durability, drainage, and performance, and are a proven alternative to traditional concrete drains. Installing a channel drain starts with a narrow trench cut into the concrete or asphalt. Easy method to create corners, tees or 4-way junctions. Two side entry points each side for joining another channel at 90°. with a 1. 20% VAT) ( £8. Lay 3 inches of gravel in the bottom of the trench. 12" Wide Z812 Trench Drain By Item. French drains need to have a slope of at least 1 percent, so the force of gravity will work for you. The ULMA M100KX MINI drainage system is the perfect drainage solution for projects with height limitations. Standard Products KlassikDrain PowerDrain SlabDrain 2. Humps and Hollows. Mufle 4All Shallow A15 Rated Drainage Channel; XDrain A15 - C250 Drainage Channels; B125 Drainage Channel (12. 50 incl VAT. z883 6" wide shallow trench drain system 10 z887 catch basin 11 stainless / sani-flo® zs880 stainless steel linear shower drain 12 z890 6" stainless steel trench drain system 13 z895 12" stainless steel trench drain system 14 z898 18" wide trench drain system 15 z894 24" wide trench drain system 16 z899-100 elevator trench drain system 17A curtain drain is shallower. Concrete drainage channels also feature tongue and groove joints for positive alignment and an outstanding fit with any requisite joint sealant. $59. Bullnose, Round Top and Flat Top concrete edging is mostly used along footpath edges. 44 square inches per foot, 26. The F900 load class means that this channel drain can be used. Home » Manufacturers » Zurn » Zurn Z883 Shallow Trench Drain By Item. As you dig the trench you need to allow for a fall of around 5mm. Use a mallet to gently press the channel drainage into the trench, before adding backfill or concrete around the channel run. Pickup in-store or delivery options. ₹ 1,300/ Piece Get Latest Price. Buy it now. 2) The channel width for sewer pipelines having different diameter, is tapered from one pipe size to the other. Add to basket. 4. Shallow depth trench drain system, available in 100mm, 200mm and 300mm internal widths for both general purpose and heavy duty applications. If you need a shallow trench drain it can be as shallow as 2″. Finally our channel drain range is completed with stainless steel slot drains. Place Spee-D Channel Drain End Caps at the end of the runs as. The Lite Aqua is by far the shallowest channel out of the ‘lite range’, with as little as 55mm depth. DR800 ACO Drain Price List 1 of 5 (Standard Products) 2022. The other thing you could do is rent a walk behind concrete. ACO Drain consists of cast polymer concrete bodies with either galvanized steel, stainless steel or cast iron wearing edges. 4 in. Bottom Outlet fits 3" Sewer & Drain Fittings. Shallow drainage channels are commonly used in. 99 postage. L Trench and Channel Drain Kit with Black Grate (3-Pack : 9. 37 in. 5m 1SDGR77 500 128 30 uPVC Standard Grate 0. 8 x Black channel with galvanised Steel Grate Ultra Low Profile Shallow Flow Drain Plastic Grating 50mm Deep x 1m Length x 125mm Width Drainage Channel suitable for Garden Patios and Driveways £79. Zurn Industries Z415-BZ1 Floor. 87 postage estimate. ca@bg-graspointner. The linear design eliminates grates that can be weak, trap bacteria and are difficult to clean. Shallow Profile Channel Drain Kit. #1 Home Improvement Retailer Store FinderPolyDrain Shallow Channels are a shallow polymer concrete trench drain system that offers a practical and economical drainage solution where slab depth restrictions dictate. S. Connecting pieces are also available to complete your installation. The M300 is suitable for residential, pedestrian, park landscape, shower buildings, parking lots and even winery applications. Product ID Z886-669558409. Like a trench drain, a swale is a surface water drainage device. Add to basket. This is an ideal option when site depth restrictions are more important than hydraulic capacity in external areas. A one-metre channel and corner unit are now available. surface will move through shallow water. This allows the. External dimensions: 1000mm long - 130mm wide - 80mm deep Class A15 Nine Bottom Outlet Point. When laying the concrete base, make sure it is level with enough space for the channel drainage unit. Underground Drainage. 95. Or call us at 888-825-4716. 0 squareThe SS500 Series™ is exclusively available through Trench Drain Systems. 5 Tonne) C250 Drainage Channel (25 Tonne) D400 & F900 Commercial Drainage Channel; Threshold. Jay R. 50 incl VAT. 19. All systems can be connected to 75mm, 90mm or 100mm pipes. Backed by the engineering of Infinity Drain, Center Drain Pro-Series is dependable, livable and accessible. Trench Drain. The Lite-Line HDPE shallow trench drain is a lightweight channel that is strong and durable. 2 in. Z884 Drainage System There is a wide variety of applications that require a trench drain system. 5Tonne Load Rating. 75″ deep interior (2. Channel drains, or drainage channels, reduce. L x 4. £6. The ACO Building Drainage Deckline 125 galvanised steel channel drainage system is a further development of our current highly successful Deckline channel solution. The POLYCAST® 500 Series is Hubbell’s low-profile drainage system. Next you will want to form the inside of the concrete trench drain. Engineered Plumbing Products & Drainage Solutions - Jay R. Vat. Dig a trench from the place in your yard that needs drainage to your chosen outlet. com 518. Low Profile Drainage Channel x 1m B125 Plastic Grate. (1 Per Channel)ABT Inc. 1. 16. 5 depth. 4 in. Finally our channel drain range is completed with stainless steel slot drains. is a leading manufacturer of quality engineered plumbing and drainage products in the non-residential construction industry. Slotted Drain Inlets and Trench Inlets. The 500 Series is POLYCAST’s shallowest drain, measuring O. All ACO’s channel systems are design to integrate with. The 0. Trench drain systems are available for any trench drainage applications. Designed in accordance with EN 1433. We know each site has unique needs that aren’t the same. The simple connection to standard drain outlets makes KERDI-LINE suitable for new construction and renovation. 23 (3) RELN. Shipping Dimensions. Learn about our line of Filcoten Trench Drains!Surface Drainage. 1. Fit the pipes together and lay the pipe into the trench. INSTALLING A SHALLOW CROSSPIPE. Add to basket. Continue to 5 of 12 below. For use with vinyl and other flexible sheet material. used when the contributing drainage area causing the shallow flooding is less than 1. Aco Raindrain Sump Unit with A15 Galv Steel Grating c/w Bucket Ref 38703. 6% and radiused bottom. Dig a trench which is large enough in height to accommodate a 50mm compacted sand base at the bottom, and is wide enough so that 100mm of concrete side fill on each side can surround the channel. With short-channel devices, the reliability margins have also been cut down significantly [3]. Compare $ 179. It is applied often in pedestrian or light traffic areas, such as swimming pools, garages, distribution. Range of Options With the NDS Trench Drain Pro Series system, you have choices. Ensuring the proper depth will allow the drain system to sit flush with the surrounding concrete, creating a seamless transition that will prevent moving objects from catching in the drain channel and people from tripping and falling. It does adapt to a 4” pipe but it is kind of convoluted. Zurn Industries Z1730 Shallow Depth Heavy-Duty Floor Drain - 9" Diameter Top . Where to buy. PolyDrain Domestic Low Profile Heelguard Channel Drainage (Class A15) A high quality, high strength shallow channel drainage system for low profile linear draina. Easy to use channel to channel locking system with concave grid for maximum flow. That’s right – our shallow trench drains come in all sizes including 2″ wide, 4″ wide, 6″ wide, 8″ wide, 10″ wide, 12″ wide, 18″ wide, 24″ wide, 36″ wide, and 48″ wide. Product ID NDS-864GMTL. Thanks to its versatile design the Mufle 4All Shallow Drainage Channel A15 can be used in a number of settings, from residential or commercial projects to landscaping or industrial projects. R. DekDrain A15 channel drainage system is the perfect system for gardens, patios, public pedestrian areas, driveways, garage thresholds, and light traffic areas. Currently mole drainage systems are most commonly used. 16. Dig the trench. NDS Slim Channel Drains and Grates 6-ft L x 2-in W x 2-in dia Drain. NDS Slim Channel Drains and Grates 6-ft L x 2-in W x 2-in dia Drain. Replacement Grates for all Manufacturers. A key feature of the Linear Wet Room Screed Drain is its shallow drainage channel, the total height from the base to the top of the trough being only 55mm, making it perfect for today’s. 25” x 1. ACO is a trusted supplier of high-quality plastic and steel drainage materials, such as channel drains. Multiple Options Available. The shower drain incorporates our unique Lo-Seal waterless trap technology which has been granted BBA approval and is supported with a lifetime guarantee. 5. The pre-sloped commercial trench drain line is offered in 2″ , 4″ , 6″ , 8″ , 10″ , 12″ , 18″ , 24″ , 36″, and 48″ widths. The Swiftdrain 300 trench drain system is a best in class 12″ wide pre sloped trench drain. 5 in. 2 in. • The wide roadway sections, flat grades, shallow water courses, absence of side channels • The potential for more costly property damage which may occur from ponding ofZurn Z874 Utility Trench. The modular channel sections shall be made of 16-gauge type 304 stainless steel. Specifically designed for applications including around running tracks, swimming pools, shower stalls, sidewalks, in pavilions and plazas, and anywhere else a nearly invisible drain is advantageous. Plastic Removable Grid Supplied. The Slot Drain Systems slot drain is a modern take on the traditional sidewalk trench drain. 23 (£15. Step 4 - Dig. Made from structural foam polyolefin recommended for light traffic. long; length can be cut to size with a saw. 99Inc Vat. TrenchFormer and FirstFlush by ABT also provide superior solutions for drainage problems. A straight line system with bottom outlet discharge and ADA compliant pedestrian safe heel guard grate is perfect for paths and driveways. The ULMA M100K linear MINI drainage system is made with polymer concrete featuring built-in galvanized steel edging. Using Polyclip installation brackets, contractors can align and level channels quickly. SETTING the Drain SystemStep 4: Set the Channel Drain. This pre-cast concrete channel comes in pre-sloped and neutral sections with a variety of grates to meet the needs of any project. A 200 mm (8″) wide fiberglass system supplied in 2. 299. The Doorway Drain simply slots in front of the building entrance without the need to modify the door-frame. Our HexDrain installation tutorial shows you how easy and quick it is to prepare and install ACO HexDrain drainage channels and accessories. 2 1/2 [64] WIDE REVEAL TRENCH DRAIN SYSTEM ENGINEERING SPECIFICATION: Zurn Z880 2 1/2 [64] Wide Trench Drain System shall be 48 [1220] long and 2 1/2 [63. 10 x Black Ultra Low Profile Shallow Flow Drain Plastic Grating 50mm Deep x 1m Length x 125mm Width Drainage Channel suitable for Garden Patios and Driveways; Each order comes with two End blanks and one 110mm outlet adaptor to connect to 110mm underground drainage; Less time spent digging A possible way to monitor the performance of a trench drain is to check the outflow from the pipe at the bottom of the interceptor trench. Shallow drains refer to subsurface (tile) drain pipes installed at a depth of 2. Storm Mate 40 in. Draining flat pavements in the urban environment is challenging. Vivante 24-in Matte Black Linear Shower Drain with Square Pattern. This offers an advantage from the traditional center drain installation, where the floor must slope in four directions in order to drain the water properly. Channel Material: FILCOTEN. The high quality ACO RainDrain channels interlock, allowing for quick and easy installation. 70 £ 48 . Channel & Trench Drains Product Line-up NDS Micro Channel Drains Pools, Spas, Patios NDS 5-Inch Pro Series Features include 39 3/8" long deep profile high impact PVC channel drain with mechanical interlocking joints, structural foam polyolefin light traffic channel grate with an open surface area 20. Drain Systems. Recommended for medium-duty pneumatic tire traffic; autos and light. Mifab Shallow Trench Drains. Shallow Polydrain Channel x 1m HDPE Grid. 48” x 6. Provides an efficient drainage solution for a wide variety of applications; Strong and robust V shaped channel design with a range of constant, sloped and shallow depth channels; Strong and light weight design, with male and female channel connections to aid accurate installation; Channel system available in three channel widths: 100mm, 150mm. 3 bottom outlets in every channel drain; No clips or screws required to assemble; CLASS B: Loads of 61. 2. Add to basket. 4. Line the trench with landscape fabric, add 8–10 inches (20–25 cm) of gravel, and top the gravel with rocks or. In essence, a trench drain consists of a large trench that has a drain channel set in place with concrete. 00. 25 micron integrated devices. The purpose is to slow and control the flow of water to prevent flooding. £25. As a shallow invert channel drainage system Deckline is perfect for use in applications where excavation depth is limited or structural slabs are used e. 20% VAT) (£11. Specialty Products Brickslot MiniKlassik Grated Pits SlabDrain SlabDrain is available in 100mm, 200mm and 300mm widths and is a shallow invert trench drain comprising modular Polycrete® Channels*. W x 3. Shower Drainage Channel Foul Air Trap 50mm or 40mm Water Seal. The second step would be to dig the trench. 99 Incl Tax: £7. Add to basket. Drainage channels are designed to be used to provide drainage solutions for surface water on driveways and patios and around garage and conservatory entrances and exits. Or if the slope of the ground permits it, use a creek bed to drain a low spot. Pegasus A15 Decorative Stainless Steel Drainage Channel. • Sleek, yet durable grade 304 stainless steel construction. Powered trenchers and trench digger options. Slot Drain Systems has developed the 6000 series pre-sloped Slot Drain to meet the challenges for the types of jobs with thinner slabs. Channel Drains Metal Grate Shallow Driveway Drain Channel PVC 1 Metre ACO Style. Some of the common outlet pipe types are: PVC. To do this, you will need the aforementioned self-tapping screws and PVC solvent cement. We consider the contractor with every product feature and support service Zurn provides. Channels shall be. Linear drainage refers to systems that drain along their entire length, rather than at one particular point, as a gully does. The end result should be a shallow basin with about 6 inches of “ponding depth,” or space for water to pool while it drains through 1 to 2 feet of amended soil. 49 (Exc. or 4 in. 5445 sales. 6" Wide Zurn Z886 Trench Drain Kit 99 Foot Complete. 37" (1 meter) 5. Finish: Baked on Oil Finish, BoOF. Suitable areas for C250 ACO DeckLine include roads that experience light levels of traffic and private car parks. PolyDrain® Shallow features our exclusive “Red Dot” locking blocks and can accept any standard PolyDrain grate. 36 per mm. Open drain. Slot Drain is a strong solution for any size of project. DrainTEK Outdoor Landscape Pool Drainage Channel - Tray and Grate - Wedge Wire / Heel Guard Style - 135mm Wide with 70mm pitch. We also supply a variety of accessories including channel drain end caps, channel drain outlets, channel drain corners and quadrants and sump units / silt traps. NDS Dura Slope Trench Drain Systems are designed to provide a solution for residential, commercial, and industrial drainage needs. A linear French drain is simply a "moat", or gutter-in-the-ground, that protects your yard or house from sub-surface or surface water. Shallow Concentrated Flow; Channel Flow; Tc = TSheet + TShallow + TChannel. It consists of perforated pipe embedded in gravel and installed in a sloping trench. » NDS. 2 in. Zurn Z883 Shallow Trench Drain By Item; Zurn Z874 Series Trench Drain System; Zurn Z800 Series Fiberglass Trench Drain System; Zurn Z888 Series Slotted Drainage System; Zurn Z700 Series Frame and Grate System; Zurn ZS880 SS Shower Drain By Item; Zurn Z882 Special Order Grates; Zurn Z886 Special Order Grates; Zurn by the Foot; More ZurnPrice Lists. Furthermore, the incorporation of a JS allows a reduction of the body doping in a VMOSFET-JS whilst maintaining similar. Z884 GL Bag Locks for Bronze Grate. 00. - •PVD Coated Shower Drain Channels in Yellow Gold & Antique Copper Colors. A shallow drainage channel is a type of drainage system that is designed to collect and channel water away from a specific area. heavy-duty utility trench with steel frame and ductile iron solid cover 12" wide trench drain system8 z880 2-1/2" wide trench drain system 9 z884 4-3/4" wide shallow drain system 9 z883 6" wide shallow trench drain system 10 z887 catch basin 11 stainless / sani-flo® zs880 stainless steel linear shower drain 6" wide heavy-duty modular trench. Zurn Z883 Shallow Trench Drain By Item; Zurn Z874 Series Trench Drain System; Zurn Z800 Series Fiberglass Trench Drain System; Zurn. Provided in a range of capacities and with a choice of styles and load bearing limits, Marshalls has a concrete drain channel that will meet any scheme’s needs. The hold down feet and pipe cut–outs make it simple to install. Clark-drain Channel & Galvanised Driveway Drainage Grate - 1m (30) £29 . Like a trench drain, a swale is a surface water drainage device. 10" (130mm)NDS Channel Drain systems are an effective and popular solution when perimeter drains are needed for hardscaped areas. The channel sections snap together to create longer runs or divided down to four-inches for smaller sections. Invest in a quality Shallow Channel Drain A15. Use a spirit level to make sure the fall is set at the correct angle. A shallow invert channel drainage system ideally suited to areas such as structural slabs or where excavation depth is limited. Polypropylene structural composite drain channel with 3. S. In general you can use any pipe material to connect from the trench drain to the underground system. W x 3. This allows the humped shapes to shed excess moisture into the hollows which double up as shallow surface drains. (See below for a shopping list, tools, and steps. When the pipe is connected, level the area where the drain is going to be laid. DR802 ACO Drain Price List 3 of 5 (Systems) 2022. 75 inc VAT Was: £0. Everhard 1m EasyDRAIN Pressed Galvanised Steel Grate And Channel (2) $47. Features. 1000" (93 Ft) Complete. 75 m (9 ft) sections. Hi-Slot Drainage Channel. Our concrete drain channels come in a range of styles, including. Modular trench drains shall be factory manufactured and engineered with. A nice galvani. With a combined 50 years of experience in specifying, selling and sourcing pipes, plastic drainage channels and other plumbing products, we. Shallow Channel Trench Drain 9836 - Jay R. Achieve effective water management in your landscaping project with shallow drainage channels from Marshalls. corrugated pipe adapter included; Compatible with the RELN pop-up emitter part 000233. Light Gray. Modular Design. D x 39. Together, the parts form a heavy-duty drainage system made of Vienite, which is ACO's own durable recycled polymer concrete. PDX is available in 7 different interior widths from 6” [152mm] up to 24” [609mm] with depth increments from 0. These. Smith Mfg. 1. Make the hole big enough for a 55-gallon barrel. Channel drains are available with various material top grates. Next, a long channel drain is placed in the trench. You construct it by digging a 6-inch wide trench approximately 24 inches deep. 5” and I. BalconyDrain is a range of shallow drainage channels and is not limited to use in balconies. 3. Finally, it contains pre-sloped and non-sloped drain channels, amongst other important features that make it an excellent drain solution. Provides an efficient drainage solution for a wide variety of applications; Strong and robust V shaped channel design with a range of constant, sloped and shallow depth channels; Strong and light weight design, with male and female channel connections to aid accurate installation; Channel system available in three channel widths: 100mm, 150mm. Use on any concrete patios or drive. 20ft Price: $209. Click the grating in and out, no screws required. Add to basket; LiteAqua 100 Shallow 1Mtr Channel 55mm Depth – A15 Galvanised. Trench drains are the most common system, with various types of trench drains available. Wire and Bed trencher information. Different channel widths:: 100-150-200-250. Registered Office: Merchant House, Binley Business. Critical flow occurs when v = c, or more generally Importantly, critical depth is independent of the channel slope. Blockslot B125 Channel Drain. All of the current Threshold Drain accessories can be used on these new items. 22 £ 79 . Galco Steel Ltd Galco House, Ballymount Road Walkinstown, Dublin 12 +353 [0] 1 424 7000 +353 [0] 1 424 7001;Low profile drain kits supplied by Trench Drain Systems have a shallow profile for situations where your application doesn’t allow for a deeper trench drain. The new Center Drain Pro-Series offers the benefit of not only being big on style, but a smart value. L Trench and Channel Drain with Black Grate (443) Questions & Answers. Add to Cart. What Are Strip Drain Systems? Strip drain systems, often simply referred to as strip drains, are a type of drainage system featuring a slim, elongated design. Install a drain grate and outlet at the top of the trench. HydraDry Drain Channel – works to remove water and channel it far away from your home,. The 300 series is made of fiber reinforced concrete channels. The depth will depend on how much water you need to funnel away. ACO Sheet Flooring Shower Drainage Channel Quatro Grating 700mm. Use solid pipe if you want to redirect the water to a pond or rain garden. The C250 loading class channel drainage is made of high-class material (polypropylene). The high quality ACO HexDrain channels clip together, allowing for quick and easy installation. Click & Collect. If there is steady shallow seepage towards a streambank, this exit pipe should flow continuously. Applications Driveways - Positioned between the garage and the driveway. VAT) – +. The silky-smooth. Shallow Drain Channel 1m Lengths Polydrains Channel Quad box End Cap Body Outlet. A drainage gulley is traditionally a shallow, semi-circular, depression which collects and directs surface water. Each order. V-shaped Open drain. Description. Designed, tested and certified to BS. 1. Opens in a new window or tab. D. 37") Channel & Light Duty Galvanized Grate. The Slim Channel™ Drain, part of the NDS Profile Channel series, captures light flows of runoff from pool and spa areas, concrete and paver patios, and walkways to prevent. Recommended for medium-duty pneumatic tire traffic; autos and light. Like all their systems, the 6000 Series. 10 x Black Ultra Low Profile Shallow Flow Drain Plastic Grating 50mm Deep x 1m Length x 125mm Width Drainage Channel suitable for Garden Patios and Driveways Features & Benefits Quality Aesthetics Lightweight The security of BS EN 1433: Load Class A15 The efficiency of the quad connector The ease of the connection system Non Rusting design A linear French drain is simply a "moat", or gutter-in-the-ground, that protects your yard or house from sub-surface or surface water. D. Shop online or call today for a quote at (610) 638-1221. ACO HexDrain is a. A surface drainage system consists of shallow ditches and should include land smoothing or land grading. AS MANY AS YOU WANT FOR ONE POSTAGE. 1 x Grey Ultra Low Profile Shallow Flow Drain Plastic Grating 50mm Deep x 1m Length x 125mm Width Drainage Channel.