Designed for landscaped, pedestrian or other non-loaded applications. 3 Crates per m3, 60 Tonne Rated. Stormwater Retention, Attenuation and Infiltration The Polypipe Polystorm Cells can be mainly used for rainwater Retention, Attenuation, Infiltration. ACO StormBrixx is designed to optimize stormwater management via soakaway or attenuation by pairing a high void ratio with integral access chambers and an open cell structure for easier inspection. The unique compressive properties, modular design and choice of strengths, from 200kN/m2 up to 1000kN/m2, make GEOlight® extremely versatile. 3 Crates per m3, 60 Tonne Rated. We will look at the engineer’s design and optimise the tank depth to be as economical as possible for the contractor, even where there is a very shallow fall, or perhaps where we need to achieve. 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). 00 Graf Infiltration Tunnel Kit for Soakaways, Attenuation and Wastewaster. Visual and maintenance access can be achieved when used in conjunction with Polystorm Access & Inspect. This inspectable crate has a variety of applications, including stormwater attenuation and soakaway tanks. If you are installing an attenuation tank system, in addition to the geotextile you will need to use a geomembrane to ensure the water is retained within the attenuation cells. If you have already calculated your storage volume, you'll need that figure and the below: An idea of your tank dimensions. 1000mm x 1000mm x 400mm dimensions. crates, impermeable geomembrane and geotextile to make a stormwater attenuation tank. Stormbloc® Stormwater Storage / Infiltration System A modular system with an integral patented maintenance / inspection tunnel. 5 per m³) Designing attenuation storage for redeveloped sites The authors This factsheet has been prepared by Anthony McCloy of McCloy Consulting. Designed to be installed underground, these light-weight crates are easy to assemble and connect together to enable you to create your required structure. Reservoirs . Additionally, if it is under an area of. The. AquaCell NG is designed primarily for landscaped. 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. Trustpilot. Stormwater is the excess rainwater that flows from rooftops, roads, car parks and other buildings. 07 (inc. 3 StormCrates per 1m³ storage capacity • Lightweight and easy to install in up to 10 layers • High strength crate with lorry bearing of up to 60 tonnesCarlow Concrete are one of the leading specialists in Stormwater Attenuation in both the UK and Ireland. Its flexible modular structure is light but strong, making it ideal for use beneath areas such as roads, car parks and industrial areas. Sort By: StormCrate55 modular cellular crates are used in storm water retention, attenuation and infiltration applications. 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. Infiltration and attenuation Modular Units supplied by Plastech (Southern) Ltd in Hampshire. 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. Environmental Friendly. Aquacrate, made in the UK from recycled polypropylene, is a load-bearing underground water attenuation/soakaway system with. The honeycomb design is extremely strong allowing vehicle loading with minimal cover. Here are the steps required for undertaking a percolation test for foul water soakaways: Excavate a hole – Dig a hole 300mm square to a depth of at least 300mm below the proposed invert, spacing them along the proposed line of the where the soakaway would be. 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. 5m x 0. Compare and contact a supplier near you. VAT – +. However, if you are using them for infiltration, the water will slowly soak away into the groundwater table. 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. 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. Specialists in water management & treatment. 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. In some cases you may even need at least 4-5 cates per. Key benefits include: Flood Risk Prevention: Attenuation. VAT. Applications. They are also suitable for use beneath car parks. September 1, 2022. From £6,019. 5 yrs CN Supplier . Each unit of Rainstore 3 measures 1 m x 1 m x 0. Used in landscaped areas, or in trafficked areas up to a Gross Vehicle Weight (GVW) of 30 tonnes. Buried 0. The void created by the crates can then fill up with storm water during heavy rainfall conditions. Attenuation crates, also known as soakaway crates, are used to control the level of surface water and reduce the risk of flooding. The modular geocellular tank is made of polypropylene (PP), it is 100% recyclable at the end of its service life. stormwater in both attenuation and infiltration schemes. This below ground Rain Bloc crate is a simple an effective way to form an attenuation tank. An attenuation tank can be made up of geo-cellular crates, impermeable geomembrane and protective geotextile, to create a watertight storage tank underground. 5kg. It’s the fact that they’re wrapped and sealed in a completely watertight liner that they actually perform a job. 5 crates to provide 1. Stormwater attenuation tanks provide a storage system for rainwater and surface water. A hydro brake ensures it is released at a rate that won’t cause flooding or excess strain on the system. StormCrate55 modular cellular crates are used in storm water retention, attenuation and infiltration applications. 00. . 5kg. They are modular, so multiple crates can be used for a soakaway. Our easy-to-assemble crate can be installed beneath gardens, pedestrian areas and. Comprising of light but sturdy plastic crates, they can either be used for storing (attenuation) or infiltrating water. Soakaway crates (also known as storm crates, infiltration crates, anti-flooding blocks or attenuation crates) have an integral part to play in the prevention and reduction of surface water flooding in built up areas. Buy premium-quality soakaway crates from Build Plumb Plastics. 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. 61’ x 0. 2. Lightweight and simple to install. Our stormwater attenuation and soakaway crates are built to last due to the quality material we use and come with a 50-year design life. 4m in size. The honeycomb design is extremely strong allowing. Soakaway Crates, also known as Attenuation. The full Rainbloc attenuation tank kit can be found here. This enables Polypipe to supply fully integrated below ground drainage elements, which may be composed of a number of differing systems, each chosen to suit the proposed location. In 1996 SDS GEOlight® helped create the foundations on which our company was built, when we completed. If specified without a geomembrane, the system can also be used as a soakaway. How GRAF stacks up vs. 00 7,500 litre SuDS Rainwater Attenuation Tank with integrated flow regulator. S. 0 sets. com : CORE Water | Soakaway Crates | Attenuation, Infiltration, Stormwater. They can be used in trafficked and non-trafficked. The modules are manufactured using recycled materials and provide a lightweight, structural component to an engineered design. we care for water. What is a stormwater attenuation tank? Attenuation tanks are often confused with soakaway crates, and while there are some similarities between them, the way they operate is largely very different. Cut outs are available for incoming pipework. 00. This rainwater soakaway tank kit comprises the following: Rainbloc crates (1200x600x420mm, 95% void) (select dimensions required) Two part 300g/m² geotextile outerwrap for protection Deareation/ventilation outlet This below ground Rain Bloc crate is a simple an effective way to form an attenuation tank. 00 7,500 litre SuDS Rainwater Attenuation Tank with integrated flow regulator. Click to download your FREE information pack. Pipe Connections. 0 kg, Base 2. 6m for car park use, the Naylor Aquavoid-Metro can also be. Post navigation. Brett Martin Cellular Storm Water Crate 55 Tonne - 1200mm x 600mm x 347mm. Minimises risk of flooding and stores water (water to SUDS requirements) 400-litre capacity (2. The installation of storm pipes is quick and easy. They have a heavy-duty lorry-bearing capacity of up to 60. This rainwater soakaway tank kit comprises the following: Rainbloc crates (1200x600x420mm, 95% void) (select dimensions required) Two part 300g/m² geotextile outerwrap for protection Deareation/ventilation outlet This below ground Rain Bloc crate is a simple an effective way to form an attenuation tank. It can hold 0. Stormwater Attenuation Tank Installation in Belvedere, South East London contains 'Crabtree Manorway North is a large-scale, new-build industrial esta. Soakaway Attenuation Crate System - Copperfield, Burbage. 6m x 0. £69. The crates hold water when there is a sudden large flow in a storm to alleviate the. Delivery. Modern stormwater management solutions allow for local rainwater treatment, attenuation, infiltration and/or reuse — offering a more efficient, economical, and environmentally friendlier alternative to conventional drainage systems. Stormcell ® is a high-capacity, low-maintenance modular stormwater and surface water storage system that can be customised to suit shallow, deep or irregular sites. Cost effective, particularly when used as a hybrid, value engineered system. We understand that the installation of a wastewater system is a big investment. Therefore maximising an area for both land use and stormwater management is crucial in a developed city. Delivery. We install many of our products so can provide real-world advice. . Of our clients recommend us. Control and manage your rainwater surface water runoff – our storm crates can be used for both attenuation or ground infiltration in a variety of applications. Types of water management solutions. 480 ft³)/Truck The GRAF EcoBloc Maxx is the ultimate stormwater management solution designed for versatile applications including soakaway, stormwater attenuation, and rainwater. These include providing rainwater storage and attenuation to prevent flooding along with preventing peak flow to the main surface water drainage system. • Assisting with storm water and flood control. SDS GEOlight® has been constructed entirely from post-consumer recycled PVC waste, which is normally destined for landfill. Triton Stormwater Solutions: The Comprehensive, Low-Maintenance Underground Stormwater Solution. com. £69. In this video we take yo. AquaCrate Stormwater Soakaway and Attenuation Crate 20 Tonne - 2. Documentation. These crates are used in a storm water management system to provide temporary storage for rainwater runoff. Earlier this year, we assessed the carbon footprint of two different types of attenuation. Cut outs are available for incoming pipework. 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. Stormwater Attenuation Lagoon Also known as Detention Basins, Stormwater Lagoons are used to control the flow of. Complete crate weighs 11. 0 /5 · 0. 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. 4 m³ with an approx. The system facilitates quick and easy assembly on site where multiple configurations can be formed. Incredibly strong and durable modular polypropylene construction. Suited to trafficked areas. Ordered terram t1000 Good price Good communication Delivered on time Would recommend. In 1996 SDS GEOlight® helped create the foundations on which our company was built, when we. This stormwater management crate is certified to be able to form part of SuDS drainage systems as well as conforming to standards for adoptability. Shows. Stormwater Detention Tank Crates is also known as stormwater infiltration tank, and it also can be named as rainwater modular tank, stormwater attenuation crates, stormwater detention tank or rainwater retention tank, etc. This product can bear up to 20 tonnes and is 1m x 1m x 0. Stormwater management system with various applications: Rainwater infiltration, Stormwater attenuation, Rainwater harvesting, 60 tonnes/HS-20, 410 m³ (14. Bespoke stormwater attenuation tanks. Graf Rain Bloc Stormwater Attenuation Crate - 3. 3 Crates = 0. Head office: 134-140 Old Bathurst Road Emu Plains NSW 2750 Australia. Attenuation tanks help to control the ground drainage, allowing the surface water to release gradually if it is flowing at a moderate rate, or is diverted into a chamber and stored if the flow is heavy. Customers we have served. Four StormCrates per 1m³; 95% void ratioHere at Drainage Superstore, we have a number of soakaway crates to choose from. Official StormTech Partners since 2003, CubicM3 offers StormTech ® stormwater chambers, the most cost-effective method to save valuable land and protect water resources. This product can bear up to 65 tonnes and is 1m x 0. Features & Benefits: Formpave Distribution Tank Single - 354 x 708 x 150mm. FREE shipping and FAST delivery. 00 Graf Infiltration Tunnel Kit for Soakaways, Attenuation and Wastewaster. ABG blueroof – Blue Roof System. indd Created Date: 10/16/2023 11:03:26 AM. Features & Benefits: Graf Rain Bloc Stormwater Attenuation Crate - 3. They work by holding onto the water during storms and only allowing this water to disperse back. Stackable Crates: Stackable stormwater attenuation crates offer a modular design that provides. A stormwater attenuation system provides a cost-effective solution but not all companies. 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. Leiyuan - Model M2015S - Infiltration Tank - Geocellular, for Underground Stormwater. Easy to handle and install. Shows. 19m3 per crate. Please get in contact – 0121 351 3230. Order: 10 cubic meters. A solution to this is to make the area permeable, for instance by using permeable paving or asphalt, or installing soakaway systems. 00 10,000 litre SuDS Rainwater Attenuation Tank with integrated flow regulator. Drainwell Crates are also used to retain stormwater for reuse. 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. Take water infiltration into your own hands with our reliable and durable soakaway drainage solutions. Installation: Underground. Attenuation tanks are installed in an excavation prepared and backfilled by the contractor using Variobox crates, LLPE membrane and a protective fleece. . From £3,669. 8x images & text from inside cover of SWM display box . Attenuation & Soakaway Crates. ,Ltd. 1. This slowed rate of discharge helps to avoid downstream flooding and the erosion of water ways due. Inlet to chamber 2. Managing stormwater is becoming more and more of a challenge for builders and developers who need to meet the increasing regulation to control its flow. The modular cells combine to provide water storage structures to help with localised flood. These strong, long lasting and eco-friendly crates are ideal for use in residential, commercial,. 0%. What Are Stormwater Attenuation Crates? Soakaway Crates to capture water and store it to be stored elsewhere. 0. delivery 5 working days. Each soakaway crate is a different size, therefore the brand you choose can determine the number of crates required for your attenuation system. This stored water later is released. Hybrid SuDS. Amazon. Allied to SDS SYMBiotIC™ smart monitoring and control these devices protect nature-based solutions from the impacts of. Explore our wide range of durable and efficient products and make your selection today. What are the advantages of our Soakaway Crates? Assembled ready to installAs the crate structure fills, water begins to exfiltrate from the tank into the surrounding ground. 250 ft³)/TruckThis rainwater attenuation tank kit comprises the following: Rainbloc crates (1200x600x420mm, 95% void) (select dimensions required) 1 x 1mm Polypropylene Shoe Box Liner to form a sealed tank (not a soakaway) Separate lid liner (to be tape joined) Double sided tape to join the two sections together Two part 300g/m² geotextile. Key Benefits of the PSM1A Polystorm-R Crate: Suitable for both attenuation and soakaway systems; 100% Recyclable; Only 4 StormCrates per 1m³; Load bearing strength of. 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. StormTech affords low embodied carbon per m. 5m incorporating a 150mm sump. Other factors to take into consideration include the expected flow rate and the type of soil in the ground. Stormwater Attenuation & Soakaway Crates. As part of the work, the individual crates were lowered into the excavated area and were. Storage capacity of 217 litres. oh and don't forget we price match on most products! Storm water attenuation crates allow you to store large volumes of water which can then be slowly released into the surrounding soil. Features & Benefits: Polypipe PSM1A Polystorm Plastic Soakaway and Attenuation Crate. Rain Bloc Stormwater Attenuation/Soakaway Crate. 5 litres or 0. Precast concrete tanks provide the ideal solution for. £69. 64′ x 1. 00 $ 150 . Cost effective, particularly when used as a hybrid, value engineered system. 00. The crate structure is surrounded with a permeable non-woven geotextile to prevent any ingress of silt to the crate structure. We can also offer an installation service if required. Based in the Midlands, we're specialist installers of stormwater attenuation systems, incl. 2m3 per crate. Intense periods of heavy rainfall are placing new challenges on our country's drainage infrastructure - it's reckoned that. Explore our wide range of durable and efficient products and make your selection today. Download our FREE information pack to discover: GRAF Stormwater Management Systems. 3 StormCrates per 1m³ storage capacity • Lightweight and easy to install in up to 10 layers • High strength crate with lorry bearing of up to 60 tonnesThe most common approach to creating an underground storage tank is to use; stormwater attenuation. The crate structure is surrounded with a permeable non-woven geotextile to prevent any ingress of silt to the crate structure. This water can then be re-used on-site. €POA. 35’ x 1. 00 7,500 litre SuDS Rainwater Attenuation Tank with integrated flow regulator. 00 10,000 litre SuDS Rainwater Attenuation Tank with integrated flow regulator. This rainwater soakaway tank kit comprises the following: Rainbloc crates (1200x600x420mm, 95% void) (select dimensions required) Two part 300g/m² geotextile outerwrap for protection Deareation/ventilation outlet This below ground Rain Bloc crate is a simple an effective way to form an attenuation tank. 0m and 1. Brett Martin has provided its StormCrate55 modular crates for an underground attenuation tank designed to control stormwater and address excessive rainwater run-off as part of a prestigious development of homes in central Scotland. Shop. Our stormwater attenuation and. 65 Incl. 1. Therefore, this water can be used for irrigation. 28′ x 1. 0%. com. Home. This is. In the tank is method of releasing storm water at a rate the drains can handle without backing up. Crate size 1200mm (L) x 600mm (W) x 420mm (D) (3. Void Ratio: 95%. 18 Only full units should be used. The crates are a single piece and. Designed to be eco-friendly, our soakaway crates are made from recycled polypropylene and are recyclable at end of use, helping you meet sustainability targets. Rain Bloc Stormwater Attenuation/Soakaway Crate. The UK's highest rated online drainage & pipework supplier; Email 01371850120; EmailEcomerchant Aquacrate is designed for the storage (attenuation) of stormwater in both attenuation and infiltration schemes. Compressive strength of 20 tonnes/m 2. Description. 00 7,500 litre SuDS Rainwater Attenuation Tank with integrated flow regulator. Other factors to take into consideration include the expected flow rate and the type of soil in the ground. From £269. All penetrations are sealed to ensure one-hundred-percent waterproofing integrity, using stainless-steel bands or special components provided by the crate/block Manufacturer. As more and more developments in the UK are built on green fields, it's essential to consider how to deal with the increase in surface water run-off and…Step by Step Attenuation. Stage 3 - Stormwater is held in the tank. Our EcoBloc stormwater attenuation crates are renowned for their modular nature, enabling them to fit into small spaces suiting different site specific constraints. 4m in size and can hold 0. Share. 23’ x 1. Intense periods of heavy rainfall are placing new challenges on our country's drainage infrastructure - it's reckoned that two thirds of the devastating 2007 summer floods were the result of surface water flooding - urban deluges which flooded over 44,000 homes with a total bill in the region of. Crate Size: 1. The system is comprised of base plates, crates and side. Attenuation has become an important consideration for any new build project where a SUDS strategy is required. They are versatile products that can be used under car parks, landscaped areas and heavy duty projects within residential, retail, commercial and industrial areas. Anthony is a Chartered Civil Engineer with considerable experience in water, hydrology, flood risk and drainage, particularly in relation to SuDS design and hydraulic modelling. Documentation. Fitted with a 110mm overflow pipe complete with. the EcoBloc stormwater attenuation crates have a gross volume of 205 litres and are made from 100% recycled plastic. 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. All developments of scale, now have to contain their stormwater on site and slowly release it to the drainage network, at a controlled rate. This should give you a total impermeable area in. The unit is available in two standard depths of 1. has partnered up with a number of UK manufacturers. The first step in preparing for the installation of your soakaway is to excavate the area for a soakaway crate and a trench in which the drainage pipe will sit. from €1,914. Rain Bloc Stormwater Attenuation/Soakaway Crate. From £269. This product is designed for below-ground stormwater attenuation, surface water infiltration and as a soakaway system. They are usually used for larger municipal or commercial applications. ATTENUATION TANK CRATES FOR STORMWATER MANAGEMENT. What are Attenuation Tank Crates? Attenuation Tank Crates are containers designed for the storage of rainwater. It is suitable for a wide range of landscaped and trafficked applications, including: Landscaped Parks. Most people associate the use of modern soakaway crates with infiltration use. Iplex Aquacell® is a stormwater management cell designed for use in infiltration, attenuation or storage / reuse applications. Polystorm Lite has been specifically designed for non-trafficked applications. If purchasing in bulk give us a call so we can offer you the best price. At Moore Concrete we can design and install this product based on your desired needs and specifications. We can also offer an installation service if required. View products. Triton Stormwater Solutions: The Comprehensive, Low-Maintenance Underground. Cellular rainwater attenuation module; Swift installation in up to 10 layers; Perfect for residential. 27-29 High Street, Drayton, Abingdon, Oxfordshire OX14 4JW, England. 0138 m3 (void ratio 95. • Polypipe Polystorm soakaway crates. Rain Bloc Stormwater Attenuation/Soakaway Crate. 00. The Polystorm range of products and solutions for attenuation and soakaway applications. Price on Application. We can also offer an installation service if required. As such, it’s an attractive alternative to crates, pipes and vaulted systems with numerous benefits. They provide an eco-friendly approach to control flooding and ensure the long-term sustainability of urban areas. 3 Crates make up 1m3. Graf UK Ltd posted a video to. Attenuation is where, with the use of flow controls, the water collected is slowly released back into an existing watercourse or sewer. The solution. Flexible design. Polypipe is able to offer multiple systems that may be used to provide attenuation storage within a development. ACO have created a unique comparison guide below designed as a useful tool for specifying stormwater solutions. Consequently these systems can be installed under car parks and access roads as well as landscaped areas. Its versatile design allows the system to be used in configurations and applications across all construction environments as a standalone. 4. Stormwater Solutions. These crates help prevent flooding caused by sudden downpours. The compression fit units are stacked (if applicable) and sent preassembled to the construction site so there is no assembly required. Innovators in water technology. Our EcoBloc stormwater attenuation crates are renowned for their modular nature, enabling them to fit into small spaces suiting different site specific constraints. StormMaster is an innovative company specialising in underground infiltration and attenuation tanks in connection with sustainable urban drainage (SUDs) schemes. The full Rainbloc attenuation tank kit can be found here. Call us: HOME. Min. Rainwater attenuation crates are used for a variety of uses. SDS GEOlight® is widely recognised as the UK’s market leading water storage and. 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. If the crates are used for attenuation, the water will drain away slowly into the drainage system. For more details contact our sales office. Crafted from 100% recycled plastic and manufactured within the UK our Rainsmart Ellipse storm and water attenuation crates are buried under earth, gravel or other permeable materials which creates a void space for the purpose of holding rain-water whilst allowing surface water to drain away. 25 metres. 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. ABG blueroof offers a new concept in the management of storm water on both flat roof and podium areas, and for new build and refurbishment projects. Doctor Rain is the leading manufacturer for. Located in the village of Torwood on the outskirts of Larbert, Torwood Glen is a high-end. Add to basket. Rainsmart Ellipse Soakaway Crate. Wavin AquaCell stormwater infiltration and attenuation tanks can be constructed using. Our crates provide you with a cost-effective solution. 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. The Polystorm geocellular range is ideally suited to deeper applications and can accommodate a wide range of traffic loadings, from pedestrianised areas to large HGV parks. Designed for quick installation and boasting 100% inspectability, its adaptable modular design allows for customization according to projects, making it particularly suitable for landscaped areas and. Features & Benefits: Graf Rain Bloc Stormwater Attenuation Crate - 3. 19 Drainage pipes and vent pipes up to 150mm dia are connected to the units via pre-formed inlet knockout points within the units. For further information regarding Precast Concrete Tanks Please contact a member of our civil Sales Team on 028 2565 2566, Ext 3. Attenuation crates also known as soakaway crates are used to control the level of surface water in areas that experience heavy rains or floods. Its flexible modular structure is light but strong, making it ideal for use beneath areas such as roads, car parks and industrial areas. We can also offer an installation service if required. Stormwater Attenuation Tank, Geocellular Storage Crates Supplier, Stormwater Drainage Attenuation Systems. The void created by the storm crates can then fil up in heavy rainfall and let the. 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.