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Stormwater management
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Stormwater management for flood mitigation, SuDS compliance and water quality. Geocellular attenuation and infiltration crates. Flow control devices and weirs. Slot drains, channels, gullies and catchpits. Oil separators and silt traps. Headwalls, outfalls and screens. Permeable paving and soakaways. Rainwater harvesting tanks. Telemetry and controls for highways, car parks and developments.
Stormwater management - helping you find the best solution for your project.
Galvanised steel orifice plates - curved
Curved orifice plates in galvanised steel to restrict and regulate the flow of water: 100mm Galvanised Steel Curved Orifice Plate; 110mm Galvanised Steel Curved Orifice Plate; 150mm Galvanised Steel Curved Orifice Plate; 225mm Galvanised Steel Curved Orifice Plate; 250mm Galvanised Steel Curved Orifice Plate; 300mm Galvanised Steel Curved Orifice
Stormcell® geocellular stormwater storage system
Stormcell® is a low-cost underground stormwater storage system that can be used under trafficked areas for the alleviation of flooding in existing urban areas, as well as for new developments. Stormcell® is a high-void plastic matrix made up of vertically aligned polypropylene tubes. A patented pipework system prevents the entry of silts and grits
Precast concrete headwalls
FP McCann precast concrete headwalls are designed as end connection points for outfall pipes discharging into open watercourses. Precast units are intended to reduce the need for on-site shuttering and in-situ concrete work. Their use is suited to locations where access is restricted or where environmental conditions require minimal disruption
SFA27 B headwall, backwall height 1650
SFA27 B precast concrete headwall for connecting pipework discharging into open watercourses. Sewers for Adoption compliant. Pipework up to 1050mm. Backwall height 1650mm
H6C headwall range, 1100-2050mm backwall height
A one-piece reinforced concrete headwall to suit plastic or clayware pipes up to 500mm or PCC pipes up to 450mm. Available with three standard backwall heights, 1.1m, 1.5m and 2m; lifting points cast in to each wingwall for safe handling using Althon lifting clutches; stainless steel sockets provided for the attachment of gratings and
SFA20 A headwall, backwall height 1300
SFA20 A precast concrete headwalls are designed to comply with Sewers for Adoption guidelines for pipework discharging into open watercourses for plastic, clay or concrete pipework up to 750mm: up to 750mm Pipework; 1300mm Backwall Height; SFA Compliant. Max Pipe Opening PCC 675, Max Pipe Opening Plastic / Clayware 750, Backwall Height 1300 Approx
SFA27 D headwall, backwall height 2350
SFA27 D precast concrete headwalls are designed to comply with Sewers for Adoption guidelines for pipework discharging into open watercourses for concrete pipework up to 1600mm and plastic / clay pipework up to 1800mm: up to 1600 / 1800mm Pipework; 2350mm Backwall Height; SFA Compliant. Max Pipe Opening PCC 1600 Max Pipe Opening Plastic / Clayware
Concrete headwalls with Tideflex valves
Althon manufacture concrete headwalls with Tideflex duckbill valves. The duckbill valves are factory fitted to precast headwalls ensuring they fit properly every time and reducing installation time on site. Multiple duckbill valves can be fitted to a single headwall if required. The Tideflex duckbill check valve prevents backflow
AquaCell Eco - geocellular stormwater management modules
AquaCell Eco is a modular lightweight stormwater attenuation unit manufactured from specially reformulated, recycled material. It is specifically designed for use in shallow, non-trafficked areas such as domestic gardens and similar landscaped sites. BBA approved
SDS vortex flow control for stormwater management system
The SDS vortex flow control is used to control the rate at which water is released from a stormwater storage system to downstream drainage systems. It is a self-activating device which controls the rate of water release by inducing a vortex motion. No external energy supplies are needed and it contains no moving parts. Units are equipped with a
Swale Inlet Headwall Range - precast concrete swale and pond inlet
Althon Swale Inlet headwalls are made from fibre reinforced precast concrete and designed for open inlets up to 300mm. They allow surface water runoff to enter SUDS features like swales and ponds, or to act as an outlet or overflow. Units have a 1:3 (18°) profile to match surrounding ground and include side recesses for secure installation on
SDS Weholite CSO control chambers
Weholite CSO Control Chambers are manufactured and assembled off-site and are designed to meet project-specific requirements using a standard set of components. This improves site productivity, reduces installation time and construction materials, and provides major savings on programme costs. Having been prefabricated at the manufacturing plant
Hybrid SuDS Planter - shallow rain garden system
Hybrid SuDS Planter is a shallow-profile rain garden system made for urban areas with limited excavation depth. Integrates sustainable drainage and planting in ground-level or raised units, using a Hydrorock base for water storage and slow release. Designed for installation where underground utilities or hard surfaces restrict traditional rain
SDS GEOlight® Tank - Modular Underground Stormwater Storage
GEOlight® stormwater management units are suitable for use in sustainable drainage systems (SuDS) for stormwater attenuation or soakaway infiltration. The units are PVC modular honeycomb structures with high capacity, high compressive strength and low resistance to water flow. GEOlight® soakaways gradually release stored water into the drainage
Rain Gardens - planted beds for urban rainwater management and wildlife
Meristem Design Rain Gardens are planted landscape features designed to capture and manage rainfall in urban areas, reducing surface water runoff and supporting biodiversity. Made to fit a range of spaces, they use carefully selected plants to filter pollutants and slow water flow, helping prevent flooding and erosion: planted landscape system for
Medium precast concrete headwalls
Althon medium precast headwalls are suitable for pipe sizes ranging from 450 to 900mm concrete or plastic pipework. Headwall openings are cast to suit the outsider diameter of the connecting pipework. Medium headwalls can be factory fitted with a range of accessories such as flap valves, penstocks, gratings and handrails: SFA10 B, C and D
ACO StormSed Filter - proprietary surface water filtration system
ACO StormSed Filter is a proprietary surface water filtration system designed to remove total suspended solids, heavy metals, and hydrocarbons from runoff. Suitable for high pollution areas up to 3000m², it is made for sites with limited space or where green infrastructure is not feasible. Units are available in a range of sizes to suit different
ACO SuDS swale inlet unit
The ACO SuDS Swale Inlet offers a visually appealing solution for linking proprietary drainage systems to vegetated features such as: swales; basins; ponds; water Courses; rain Gardens. Unlike traditional in-situ concrete structures, the low-profile inlet blends naturally with its surroundings, enhancing the environment rather than disrupting it
RainEdge - steel edging for rain gardens
RainEdge is a specialist steel edging system designed for creating and defining rain gardens and biodiverse planting zones. Combining durability, refined aesthetics and sustainable functionality, it allows designers to manage water flow while delivering clean, modern lines in both public and private landscapes
StormHold™ - precast pipe tank system
StormHold™ precast pipe tank system is a stormwater attenuation system designed for underground installation. It uses precast concrete pipes to form storage tanks that manage stormwater. The system integrates with other FP McCann drainage products, including culverts and soakaways. StormHold™ supports both load-bearing and non-load bearing
Small precast concrete headwalls
Althon small precast headwalls are suitable for pipe sizes ranging from 100mm to 450mm concrete or 600mm plastic pipework. Openings are cast to suit the outsider diameter of the connecting pipework. Small headwalls can be factory fitted with a range of accessories such as flap valves, penstocks, gratings and handrails: 100 to 450mm (concrete
Galvanised steel orifice plates - flat
Orifice plates in galvanised steel to restrict and regulate the flow of water. The opening in the plate can be manufactured to specified dimensions and positions. All necessary fixing materials and an EPDM seal with every orifice plate: 100mm Galvanised Steel Flat Orifice Plate; 150mm Galvanised Steel Flat Orifice Plate; 225mm Galvanised Steel
Bespoke precast concrete headwalls
Althon designs and manufactures bespoke precast concrete headwalls to meet site-specific requirements where standard headwalls are unsuitable. Available as large sectional structures or single units, they can be tailored to include gratings, flap valves, trash screens, handrails, walkways and step ladders
Angled precast concrete headwalls
Althon's concrete angled headwalls are often specified where the outfall is on a bend and the water needs to flow from the headwall at an appropriate angle to the watercourse. Angled precast headwalls allow pipework entering a watercourse at an angle to be accommodated or for an outfall to be situated on a bend in a river. Althon cast the openings
