This product can bear up to 20 tonnes and is 1m x 1m x 0. From £3,669. StormTech affords low embodied carbon per m. 4m in size and can hold 0. based in Quanzhou, CHINA. Stormwater Attenuation & Infiltration Crates • Cellular stormwater attenuation crates • Ideal for domestic soakaways • 3. Fitted with a 110mm overflow pipe complete with. 00 Incl. 5L per crate. 2. . Extensive use of this type of storm water attenuation module has helped relieve pressure on conventional surface water drainage systems in line with the Sustainable Urban Drainage Systems (SUDS) program advocated by the Environment Agency. 83 inc VAT) KLARGESTER AQUAHOLD SM Range 14,000 - 29,000 litres. The full Rainbloc attenuation tank kit can be found here. Dimensions: 1200mm x 600mm x 347mm. Easy to handle and install. Flexible connection options – length and crossways; DN 100 (4")/120 (5")/150 (6")/200 (8") 7. e. As a modular system, the crates are easily stacked to build the required dimensions. The void created by the crates can then fill up with storm water during heavy rainfall conditions. Where the previous two methods of storm attenuation simply caught water from their surrounding area, a separate tank has the ability to capture water from a very wide area using connected pipes, and collect it all together. Attenuation & Soakaway Crates. Experts in attenuation, environmental protection & water reuse. Our EcoBloc stormwater attenuation crates are renowned for their modular nature, enabling them to fit into small spaces suiting different site specific constraints. •DYKA Rainbox 3S soakaway crates: 3. For attenuation of the storm or surface water, you must wrap crates in a damp-proof membrane to hold the water. The unit is available in two standard depths of 1. Excavate the area, making a hole that is the right size for the crates and the top, side and base fillers of gravel and sand. Attenuation crates, Storm Cells, Soakaway Modules, Storm Crates all names for the same thing, they describe an interlocking crate system that has high strength and high void ratio: for Aquavoid Eco >95% They allow surface water to be stored in one location and gradually released back to the ground, a bit at a time, at a pace the ground can handle, rather than. Rain Bloc Stormwater Attenuation/Soakaway Crate. Torwood Glen. In 1996 SDS GEOlight® helped create the foundations on which our company was built, when we. Based in the Midlands, we're specialist installers of stormwater attenuation systems, incl. Used as a soakaway the rainwater collected through pipes from the roof and/orThe StormGuard+ stormwater retention system has been engineered to enhance efficiency in infiltration, retention, and attenuation systems. Get in touch today!Stormwater Management Systems. For More Information Please Contact Stormwater’s Technical Office On: Tel: 01455 502222 Fax: 01455 502223 Email: sales@storm. 00. 00 10,000 litre SuDS Rainwater Attenuation Tank with integrated flow regulator. 19m3 per crate. Find a stockist. This should give you a total impermeable area in. From £269. SDS GEOlight® is widely recognised as the UK’s market leading water storage and. Stormwater Attenuation Tank, Geocellular Storage Crates Supplier, Stormwater Drainage Attenuation Systems. However, if you are using them for infiltration, the water will slowly soak away into the groundwater table. These soakaway crates (Polystorm) clip together to form a load-bearing underground water storage/attenuation system. Infiltration and attenuation Modular Units supplied by Plastech (Southern) Ltd in Hampshire. As with a soakaway, an online system handles all stormwater through the storage area before being pumped into the drainage system. Soakaway crates, also known as infiltration crates, are a type of stormwater management system that allow water to naturally soak into the ground, reducing the load on drainage systems. Making use of Invisible Structure’s trademark ring-on-grid design, Rainstore3 exceeds H-20. A major retail and leisure complex in Northamptonshire has enhanced its sustainability credentials by using crates from ACO Water Management’s StormBrixx geocellular stormwater attenuation and soakaway (infiltration) system to promote extensive tree growth. Rainwater attenuation crates are used for a variety of uses. If purchasing in bulk give us a call so we can offer you the best price. The Rain Bloc can withstand up to 60T with. 5 crates to provide 1. Customers we have served. The unique compressive properties, modular design and choice of strengths, from 200kN/m2 up to 1000kN/m2, make GEOlight® extremely versatile. What Are Stormwater Attenuation Crates? Soakaway Crates to capture water and store it to be stored elsewhere. 65 Incl. Soakaway Crates, also known as Attenuation. The honeycomb design is extremely strong allowing. 54 Excl. As part of the work, the individual crates were lowered into the excavated area and were. 216 m3 0. Void Ratio: 95%. 0121 461 5311. The. So how does it work: half of the attenuation tank takes surface water run-off and acts just as a regular attenuation tank, while. 5. Stormwater Management Brett Martin’s StormCrate55 modular cellular crates are used in storm water retention, attenuation and infiltration applications. Figure 4: Dimensions of Attenuation Crate Used (Water Management Solutions: Modular Cell Systems, 2011) tanks have land usage implications and this is not ideal in an urban envi-ronment. Wavin AquaCell units are a tried and tested modular technique for managing excessive rainfall and can be assembled to create an underground structure as either a temporary attenuation tank or infiltration soakaway. 00 15,000 litre SuDS Rainwater Attenuation Tank with integrated flow regulator. It can hold 0. 0 /5 · 0 reviews · Contact Supplier. The soakaway crates have various load ratings that indicate their storage capacity. Its versatile design allows the system to be used in configurations and applications across all construction environments as a standalone. 00 Graf Infiltration Tunnel Kit for Soakaways, Attenuation and Wastewaster. Residential developments. From £3,669. Call 01252 336803 for pricing and stock availability. Call us today. From £3,669. CIRIA RP992 The SuDS Manual Update: Paper RP992/21 Guidance on the Maintenance Plan 4 Inspections should comply with all relevant Health and Safety legislation (Health and Safety at Work Regulations, 1999). VAT – +. This is where stormwater is fed into the soakaway structure where it is held for long periods, allowing the water to slowly infiltrate into the surrounding soil, removing the need for stormwater drains and at the same time recharging the natural levels of groundwater. Alongside the crate systems we can also offer large diameter tanks and structured wall pipes such as JFC, Aquaspira or Asset Weholite to facilitate stormwater attenuation systems. Stormwater Retention, Attenuation and Infiltration The Polypipe Polystorm Cells can be mainly used for rainwater Retention, Attenuation, Infiltration. The StormCrates are designed to be stacked together to create a. KLARGESTER AQUAHOLD SM05 - 5,000 litres. Rain Bloc Stormwater Attenuation/Soakaway Crate. 11 ex VAT. 3 Crates per m3, 60 Tonne Rated. ,Ltd. 95% void ratio giving a holding capacity of 0. 5 crates required per cubic metre (1m3) 200 kN/m2 compressive strength (Domestic Duty) Maintenance free - silt removed before crate using geotextile fabric; Light weight and easy to handleEst. For both commercial and domestic properties. The crates are designed to be simply and easily stacked together to create a below ground storm water holding tank or to allow the infiltration of storm water into the ground around them. with the Naylor Aquavoid® modular stormwater attenuation systems, but can be used with any. For advice on selecting the right product for your project contact our expert team at: klargester-web@kingspan. Rain Bloc Stormwater Attenuation/Soakaway Crate. Compressive Strength: Maximum 55 Tonne. 00 Graf Infiltration Tunnel Kit for Soakaways, Attenuation and Wastewaster. BBA Approved: Yes - certificate 15/5200. What sets this Polystorm Crate apart is its efficient interlocking mechanism. We can often suggest alternative brands that will achieve the same result and save you money. 00 7,500 litre SuDS Rainwater Attenuation Tank with integrated flow regulator. Dimensions: 1200mm (L) x 600mm (W) x 347mm (H) Crates Per m3: 4. Email: info@carlowconcrete. indd Created Date: 10/16/2023 11:03:26 AM. 0121 351 3230. 5 yrs CN Supplier . The void created by the crates can then. 4m in size. Void Ratio: 95%. As well as attenuation, the AquaCrate can also be used for greywater storage. 3 Crates make up 1m3. Rainbloc crates (1200x600x420mm, 95% void) (select dimensions required) This below ground Rain Bloc crate is a simple an effective way to form an attenuation tank. Stormwater Attenuation Crates I Stormwater Attenuation Tanks I Stormwater Attenuation Lagoons. Our soakaway crates clip together to form a load-bearing underground water storage/attenuation system. We can also offer an installation service if required. 5m x 0. If specified without a geomembrane, the system can also be used as a soakaway. £69. The void created by the crates can then fill up with storm water during heavy rainfall conditions. 00 7,500 litre SuDS Rainwater Attenuation Tank with integrated flow regulator. Our RecoCrate range of soakaway crates are lightweight modular cells with a high void ratiowhich can be used for creating underground water storage systems and attenuation systems for landscaped areas. Rainwater Retention, Attenuation and. The stored. Figure 1. Comment. Attenuate or infiltrate surface water and stormwater effectively even in challenging high-traffic urban environments. Stormwater attenuation tanks provide a storage system for rainwater & surface water. Cheap prices & extremely fast shipping guaranteed. 64′ x 1. Cover depth. 82’ (800 x 490 x 250mm) Material: 100% Recycled PP, or Virgin MaterialsThe crates are also pre-fabricated and fully assembled, making them ready to use and be installed straight away. Iplex Aquacell® is a stormwater management cell designed for use in infiltration, attenuation or storage / reuse applications. Modular Geocellular Box Units #M2014. 5m x 0. After installing soakaway crates, they can be combined with waterproof pipework and geotextile to develop an attenuation system. A solution to this is to make the area permeable, for instance by using permeable paving or asphalt, or installing soakaway systems. We offer a full range of sizes for storm crate systems and attenuation tanks. We can also offer an installation service if required. Where the water tanks simply catch water, the crate system can be used to cover a large area that is interlinked such as A carpark. This capacity can meet the demands of most large projects for stormwater attenuation projects. Ideal for retention, attenuation or soakaway applications with a suitable geomembrane or geotextile. The list below also shows how many crates fit per m 3. Surface water drain pipes normally discharge to a watercourse or indirectly into the groundwater via a soakaway. They have an inlet that allows up to 97% of their occupied space to fill with water. The water is then released from the. Whether you need to hold stormwater (detention system), soak water away (infiltration system) or detain water to release at a controlled rate (attenuation system), RainSmart will provide a simple, cost effective and maintainable underground stormwater management solution for your site. The honeycomb design is extremely strong allowing. If you have already calculated your storage volume, you'll need that figure and the below: An idea of your tank dimensions. Rainbloc crates (1200x600x420mm, 95% void) (select dimensions required) This below ground Rain Bloc crate is a simple an effective way to form an attenuation tank. This item: CORE Water | Soakaway Crates | Attenuation, Infiltration, Stormwater Retention Crate for Residential and Commercial Projects | Perfect for Flood Mitigation, Stormwater Management System $150. This stored water later is released. This design allows you to slowly release water into storm water drains with the help of a. Stormwater is the excess rainwater that flows from rooftops, roads, car parks and other buildings. Storage capacity of 217 litres. 480 ft³)/Truck EcoBloc light Stormwater management system with various applications, Lorry-bearing 12 tonnes, 630 m³ (22. These structures capture rainfall run-off and slowly release it at an allowed rate, to the storm drain system, but unbelievably they sit empty for over 95% of the time waiting for rain. Attenuation Storage Tanks - Multifunctional Benefits. 00 Graf Infiltration Tunnel Kit for Soakaways, Attenuation and Wastewaster. Additionally, if it is under an area of. Stacked on pallets to save space during transport reducing costs and CO 2 emissions. The system was created using stormwater attenuation crates, which offer an economical and versatile solution to stormwater management. 2 Limitations of tanks for stormwater quantity management As with all stormwater practices, rainwater tanks have some limitations in some situations. The. This Brett Martin StormCrate55 is a modular cellar crate system designed to be used as attenuation cells or for soakaway applications. To get started with the AquaCell Configurator, you'll need the following: The address and postcode of the site. What is a stormwater attenuation tank? A stormwater attenuation tank allows for surface and rainwater storage, which can be a requirement when new housing, commercial developments or car parks are built. The Rain Bloc can withstand up to 60T with. AquaCell NG is designed primarily for landscaped and light. One of the major benefits of using stackable crates is that the installation can be completed much faster and without the need to use specialist heavy equipment. The crates are a single piece and can be easily maneuvered, stacked and placed. 0+. The individual crates were lowered into the excavated area and then interconnected to form one huge below ground holding tank, measuring 355. 00 - $100. 285 m3), please also consider the stacking arrangement : No. 0m3 of storage volume!The JFC OriChamber is a prefabricated unit which comprises a Ø600mm Twinwall Chamber with base, 110mm internal and outlet pipework and a pedestrian duty (bolt down) cover. To build the attenuation system, the blocks are connected together into a matrix. 5 Per m3. All developments of scale, now have to contain their stormwater on site and slowly release it to the drainage network, at a controlled rate. •DYKA Rainbox 3S soakaway crates: 3. Attenuation crates, also known as soakaway crates, are used to control the level of surface water and reduce the risk of flooding. We can also offer an installation service if required. Size: 2. 4m in size. Geocellular attenuation tanks or attenuation crates are also extremely space efficient, with a typical surface water holding capacity of 95% or above. Our storm attenuation systems are used to manage excess rainfall on new developments by collecting, storing and releasing stormwater in a controlled manner to local watercourses. £69. The system facilitates quick and easy assembly on site where multiple configurations can be formed. • Load bearing strength of 62 tonnes per m3 • 95% void ratio • 100% recyclable Hydrocell Soakaway Crate 62 Ton. 5m of cover for non vehicular or 0. 25m3 of water. 0144 m3 0. Specialists in water management & treatment. The crates have multiple integral shear connectors built into each unit that locate into the crate below. Reels. 28 ft x 3. Cut outs are available for incoming pipework. Shows. . Find us on. 2m3 per crate. 19 Drainage pipes and vent pipes up to 150mm dia are connected to the units via pre-formed inlet knockout points within the units. In the tank is method of releasing storm water at a rate the drains can handle without backing up. Delivery. Triton Stormwater Solutions: The Comprehensive, Low-Maintenance Underground. 100% recyclable. £60. SuDS (Sustainable drainage systems) prevent surface water flooding by slowing down the rate of water entering the drainage network. Most people associate the use of modern soakaway crates with infiltration use. Ordered terram t1000 Good price Good communication Delivered on time Would recommend. Features & Benefits: Storage capacity of 290 litres. The rigid crates are made in black polypropylene (PP) and measure 1200mm (l) x 600mm (w) x 420mm(h) and will hold a maximum capacity of 300 litres gross or a working volume of 285 litres. VAT. Large net storage volume of 287 litres. Tried and tested with 20 years. 00 10,000 litre SuDS Rainwater Attenuation Tank with integrated flow regulator. Balancing ponds are a cost-effective solution for managing stormwater run-off providing development. 0. 00 10,000 litre SuDS Rainwater Attenuation Tank with integrated flow regulator. ← Stormwater Attenuation Crates. Stormwater attenuation tanks provide a storage system for rainwater & surface water. They are modular, so multiple crates can be used for a soakaway. We can also offer an installation service if required. StormTech offers a cost-effective solution for stormwater attenuation by including a FREE integrated water quality treatment system. Water attenuation systems prevent surface water flooding by slowing down the rate of water entering the drainage network. The RAINBOX® Cube system is designed for use in non-trafficked and trafficked areas (with a Gross Vehicle Weight of 60 tons), and can be installed in soakaway (infiltration) or storage (attenuation) applications for surface and storm water management. In terms of maintenance, there is virtually nothing you can do as they should be buried at least 500mm down and may well have a substantial layer. 4. Loading type. Its flexible modular structure is light but strong, making it ideal for use beneath areas such as roads, car parks and industrial areas. From £269. SOAKAWAY CRATES FOR DRAINAGE SYSTEM. It means we first capture the stormwater and store it in an underground tank which made up of a lot of geocellular unit modular tank, and then release the water in a slowly way. AquaCell NG is designed primarily for landscaped. A few pointers are noted as follows: What is Q-Bic Plus? The Q-Bic Plus system can be used either as a temporary storage attenuation tank or a soakaway crate, particularly where accessibility into the tank is required. 0. These include providing rainwater storage and attenuation to prevent flooding along with preventing peak flow to the main surface water drainage system. Leiyuan Greening Solution is Underground Stormwater Modules, Green Roof Trays, Horse padduck mud control grids and other plastic materials manufacturer from China. 4m3 per crate. 5%) 0. Stormwater Attenuation Lagoons. ACO. Explore. 35’ x 1. Reduce the risk of flooding and its consequences by providing for better, more comprehensive and co-ordinated water management. An attenuation system can be designed to be online or offline. Most people associate the use of modern soakaway crates with infiltration use. Easy installation, monitoring, and maintenance. Attenuation crates need to be designed to minimize. Therefore maximising an area for both land use and stormwater management is crucial in a developed city. Kingspan Klargester's Wastewater range is suitable for multiple applications, on and off-mains. 00. Choosing a stormwater attenuation tank size. 3 crates per m 3. Explore our wide range of durable and efficient products and make your selection today. Buy premium-quality soakaway crates from Build Plumb Plastics. The void in the crate holds the stormwater during heavy ra. Graf Rain Bloc Stormwater Attenuation Crate - 3. • Load bearing strength of 62 tonnes per m3 • 95% void ratio • 100% recyclableHydrocell Soakaway Crate 62 Ton. Stackable Crates: Stackable stormwater attenuation crates offer a modular design that provides. Compressive strength of 20 tonnes/m 2. The inlets/outlets are located in different positions and the crate structure fills when the flow rates exceeds the agreed discharge rate. Durable and long-lasting. The stored water inside the attenuation tank is released via a flow-control chamber and either pumped via a pumping chamber or run-off through a. The collected storm water then drains away slowly into the drainage system when the crate is used for attenuation, or, soaks away slowly into ground water table when the crate is used for infiltration. Ecomerchant Aquacrate is designed for the storage (attenuation) of stormwater in both attenuation and infiltration schemes. This Brett Martin StormCrate55 is a modular cellar crate system designed to be used as attenuation cells or for soakaway applications. Wavin AquaCell stormwater infiltration and attenuation tanks can be constructed using. Therefore maximising an area for both land use and stormwater management is crucial in a developed city. 00 Graf Infiltration Tunnel Kit for Soakaways, Attenuation and Wastewaster. They are modular, so multiple crates can be used for a soakaway system capable of providing the desired flow rate of water to a body of water or drain. If purchasing in bulk give us a call so we can offer you the best price. The full Rainbloc attenuation tank kit can be found here. 3 crates per m3 gross volume). 6m x 0. 00 7,500 litre SuDS Rainwater Attenuation Tank with integrated flow regulator. Stormwater Management Ltd was able to find a solution for a domestic, localised flooding issue, which was resolved with minimum costs and disruption to a residents house. Crate Size: 1. competitors. 64′ (1000 x 5000 x 500mm) Void ratio: 96% Tanks: 4 tanks/cbm Water Storage: 237L/tank Weight: 15kg/tank Material: Virgin PP or Recycled PP Vertical Load Capacity: UP TO 65T/m2 Lateral Load Capacity: UP TO 12T/m2 Infiltration Tanks for Modular Geocellular Systems Stormwater Retention, Attenuation. 2063 m3 (void ratio 95. The list below also shows how many crates fit per m 3. £49. Compare and contact a supplier near you. Buried 0. Stormwater Retention and INFILTRATION. With a 20 tonne per square metre compressive strength it. How GRAF stacks up vs. £58. 5m of cover for non vehicular or 0. Underground Rainwater Storage Tank Soakaway Crates Infiltration Tank Attenuation Crates Detention Tanks $26. 5m x 0. Rain Bloc Stormwater Attenuation/Soakaway Crate. Polystorm: an 8 Step Guide. Rain Bloc Stormwater Attenuation/Soakaway Crate. £69. £69. Crate Class: Light/Medium Duty. 88 ex VAT. 48’ (680 x 410 x 450mm) Material: 100% Recycled PP, or Virgin Materials Load Capacity: 35T/m2 Tanks: 8 tanks/cbm Void ratio: 95% Water Storage: 120L/tank Weight: 8kg/tank Modular Geocellular Units for Geocellular Water Management System. StormCrate55 modular cellular crates are used in storm water retention, attenuation and infiltration applications. 3 crates per m 3. 61’ x 0. The most common approach to creating an underground storage tank is to use; stormwater attenuation crates, impermeable geomembrane and geotextile to make a stormwater attenuation tank. 2When installing an attenuation tank, several benefits are provided in terms of stormwater management and flood control. Great for pedestrian and vehicular areas beneath. As we can see, these tanks are named generally according to their application, for example, we name it rainwater infiltration tank when we use it as a. Water. of Stormwater Attenuation Tank - Attenuation Crates for. The Brett Martin Stormcrate 55T Soakaway Crate is the perfect solution for managing stormwater runoff. They can be used in trafficked and non-trafficked areas. 82’ (800 x 490 x 250mm) Material: 100% Recycled PP, or Virgin Materials Load Capacity: 40T/m2 Tanks: 10 tanks/cbm Void ratio: 94% Water Storage: 98L/tank Weight: 7. Dimension: 1000mm x 1000mm x 400mm. The crates are a single piece and can be easily maneuvered, stacked and placed. Aquavoid Metro enables efficient attenuation of stormwater run off at or near its source in accordance with current best management practice. This below ground Rain Bloc crate is a simple an effective way to form an attenuation tank. AquaCrate 400 Rainwater Crates. It has a 61 tonnes/m² compressive strength and is manufactured from over 90% recycled material content. GF512 500x500x 120mm (Green Roof Trays, Green Roof Modules) GF520 500x500x 200mm / GF530 500x500x 300mm (Green Roof Trays, Green Roof Modules) Features. Specialists in stormwater management and rainwater harvesting systems, SCP Water Management Ltd. The Polystorm geocelluar system can also be integrated with Permavoid systems. 07 (inc. By Leiyuan Industrial Co. Step 2 – Prepare the crates. Capacity: 400 litres (2. They can be used in trafficked and non-trafficked. 5 litres or 0. Polystorm and Polystorm Lite are lightweight modular water storage cells with a high void ratio that can be used for either attenuation or infiltration of stormwater in residential, commercial, industrial and retail applications. 0 /5 · 0. Storage Volume: 237. 5 %) Crate 9. has partnered up with a number of UK manufacturers using EcoBloc Maxx, Pluvial Cube and Polystorm Attenuation Crate Systems to install underground stormwater storage tanks. Load bearing strength of 562kN per m2. Soakaway crates, also known as infiltration crates, are a type of stormwater management system that allow water to naturally soak into the ground, reducing the load on drainage systems. Documentation. The crates are a single piece and can be easily maneuvered, stacked and placed. constructed using modular water storage cells called soakaway crates due to their resemblance to old-style plastic milk crates. As long as a suitable membrane is used around the crates, water is cleaned as it enters the crate. Comprising of light but sturdy plastic crates, they can either be used for storing (attenuation) or infiltrating water. The StormMaster range of storage tank provides an economic versatile storage system for general use. Use the Best Rainwater Attenuation Crates Derive The Best Benefits Attenuation implies to storing of excess rain or storm water during the monsoon or storm is likely to crash. Stormwater Attenuation Tank | Soakaway Crates | Infiltration Tanks | Modular. 0m and 1. It provides a versatile solution for stormwater management (refer Iplex Aquacell. 1000mm x 1000mm x 400mm dimensions. Allied to SDS SYMBiotIC™ smart monitoring and control these devices protect nature-based solutions from the impacts of. Compare and contact a supplier serving South Africa. They work by holding onto the water during storms and only allowing this water to disperse back. Domestic Soakaways are typically 1-3 m3 so please select the number required. £69. A stormwater attenuation tank is designed to collect and store excess surface water run-off from a large storm event. Features & Benefits: Graf Rain Bloc Stormwater Attenuation Crate - 3. The crate structure is surrounded with a permeable non-woven geotextile to prevent any ingress of silt to the crate structure. Alternatively, fill out our enquiry form:The attenuation tank crates/blocks are placed to the predetermined laying pattern, before holes for inlet, outlet and vent pipes are cut to size. Description. Stackable stormwater attenuation crates offer a modular design that give you more flexibility over how the system is installed and set-up in the ground. 4 StormCrates per 1m³. Stormwater Management Brett Martin’s StormCrate55 modular cellular crates are used in storm water retention, attenuation and infiltration applications. £58. Expressing attenuation storage volumes as m3 2for each m of developed site area Approaches to determining storage volumes Understanding the fundamentals of attenuation storage design Prior to undertaking storage calculations it is important to understand a few of the basics of attenuation design. Attenuation crates (also known as stormwater crates) are systems used to store excess groundwater run-off so it can be safely discharged back into the environment to reduce the risk of floods. 3 Crates per m3, 60 Tonne Rated. - Two Structures with Five sizes available for all volumn requirements. Our storm attenuation systems are used to manage excess rainfall on new developments by collecting, storing and releasing stormwater in a controlled manner to local watercourses. of. If purchasing in bulk give us a call so we can offer you the best price. Stormwater attenuation crates offer good flexibility as they can be stacked and most come with a void ratio of at least 90%, which helps to reduce any wastage of underground space. 00 incl VAT. Attenuation crates, also known as soakaway crates, are used to control the level of surface water and reduce the risk of flooding. SOAKAWAY CRATES FOR DRAINAGE SYSTEM. An attenuation tank can be made up of geo-cellular crates, impermeable geomembrane and protective geotextile, to create a watertight storage tank underground. Attenuation Tanks are preferred over alternative methods such as soakaway crates. • Assisting with storm water and flood control. The full Rainbloc attenuation tank kit can be found here. Description.