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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.
SFA concrete headwalls with precast steps
Althon SFA Headwalls with Precast Steps are precast concrete headwalls designed for Sewers for Adoption compliance, integrating precast steps, outfall safety grilles, and galvanised steel handrailing with gated access. Made to suit various pipe diameters and types, these headwalls can include fixings for gratings, trash screens, flap valves
Two piece heavy duty silt trap inlet
Althon 2 Piece Heavy duty silt Traps are sturdy structures for use on large diameter pipes and are ideally suited for use in water courses with high velocities of water flow. Althon provide as standard with each unit a galvanized weed screen and removable centre panel for access to the silt for cleaning. Lifting points are cast into the wingwalls
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
H10C headwall range, 1250/1650/2130 backwall height
The H10C headwall is a one-piece structure for plastic, clayware or PCC pipes up to 900mm: available with 3 standard backwall heights; lifting points for safe handling; stainless steel sockets for attaching gratings; brackets for anchorage system. Backwall heights 1250mm, 1650mm and 2130mm Toe depth Toe extension pieces for overall depth of 710 or
Splayed Wing Wall Headwalls
Althon SP ‘Splayed Wing Wall Headwalls’ are precast headwalls produced with a higher wing walls at the front of the apron. SP precast headwalls are for inlets or outlets situated in locations with high or steep embankments or where the structure is required to provide protection to an accessory such as a flap valve, duck bill valve, stop logs or
400 Mitred Headwall - precast concrete outfall for 400mm drainage pipes
Althon 400 Mitred Headwall is a fibre reinforced precast concrete open inlet for surface water runoff, suitable for pipework up to 375mm and 400mm internal diameter, with a 1:3 (18°) mitred profile matching swale and pond slopes, and supplied with a galvanised steel straight bar grating: fibre reinforced precast concrete headwall for 375mm and
450 Mitred Headwall - precast concrete drainage inlet for 450mm pipes
Althon 450 Mitred Headwall is a fibre reinforced precast concrete open inlet for surface water runoff, designed for pipework up to 450mm internal diameter. Inlet profile matches a 1:3 (18°) slope for swales and ponds, with a galvanised steel straight bar grating as standard and optional inline non-return valve: fibre reinforced precast concrete
H20C headwall range, backwall heights 1.25/1.65/2.13m
The H20C culvert headwall is a sectional structure with rebated joint that is assembled on site around the drainage pipe. It is suitable for plastic or clayware pipes up to 1650mm or PCC pipes up to 1500mm. Available with Standard, Horizontal or Chamfered Wingwalls and with 3 standard backwall heights
Concrete-filled bagwork for headwalls
SoluForm concrete-filled bagwork can be used to build headwalls. The bags are simple to use and can be placed by hand, either pre-soaked or hydrated in situ. The adaptable nature of the system allows for construction in various different situations, letting personnel on site work around obstacles and install in hard to access areas
Hydro-Brake Optimum - self-activating vortex flow control
Hydro-Brake® Optimum is a self-activating vortex flow control with no moving parts and no power requirement. It is used to control the forward flow of water in both surface water applications and foul / combined applications to prevent flooding. With no moving parts and no power requirements, the Hydro-Brake® Optimum provides reliable
316 stainless steel orifice plate - curved
Curved orifice plates in 316 stainless 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 Stainless Steel 316 Curved Orifice Plate; 110mm Stainless Steel 316 Curved Orifice Plate; 150mm
ACO Q-Penstock - hdpe and steel penstock for water flow control
ACO Q-Penstock is a flow control unit for surface water and wastewater networks, made from lightweight HDPE with stainless steel 316L reinforcement. Designed for wall mounting. DN100–1500mm for HD and DN100–600mm for SD: flow control unit for managing surface water, flood, and sewage systems; made from HDPE with stainless steel 316L reinforcement
H50C headwall, backwall height 815
A one piece concrete headwall to suit pipes up to 600mm internal diameter. These headwalls can be used when the ditch bank is very shallow approx 1:3.3 They can be provided with fixings for grating, flap valves or with a full length sloped grating. Max Pipe Opening PCC 525 Max Pipe Opening Plastic / Clayware 600 Backwall Height 815 Approx Headwall
SDS Weholite attenuation tank
Weholite is spirally wound pipe or flat panel, manufactured from corrosion-resistant HDPE, to provide a light weight, engineered solution with superior loading capacity that is chemically inert and provides a projected 120-year design life. Weholite products are used in a wide variety of applications including stormwater attenuation tanks, pumping- PRODUCT
SDS Infrastructure
SDS Weholite flow control chambers
Weholite Flow 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
SDS Aqua-Filter® Separator & Filter for Surface Water
SDS Aqua-Filter®, in conjunction with SDS Aqua-Swirl®, is a hydrodynamic separation and filtration system for the removal of fine sediments, nutrients, heavy metals and hydrocarbon pollutants from surface water runoff. Aqua-Filter® can be used as part of a complete surface water management programme, for example, when connected downstream to a- PRODUCT
SDS Infrastructure
SFA15 C headwall, backwall height 2000
SFA15 C precast concrete headwall for connecting pipework discharging into open watercourses. Sewers for Adoption compliant. Pipework up to 1200mm. Backwall height 2000mm
H42C headwall range, 1120 - 2340 backheight range
The H42C is a one-piece reinforced concrete headwall available in three widths and five standard heights. Particularly suitable for steep embankments. Due to the relatively narrow footprint of the unit (back to front) it is advisable to fit suitable brackets to attach ground anchors up to 750mm pipework; backwall heights 1120mm to 2340mm; suitable
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
Standard precast concrete headwalls
Althon standard precast concrete headwalls are designed for connecting drainage pipes to open watercourses. The range accommodates pipe sizes up to 2100mm, with options for multiple pipe openings and custom pipe positions. Factory-fitted accessories and compliance with UK water authority guidelines distinguish this product range
Greenfix AquaBoxx™ - versatile modular crate system
Greenfix AquaBoxx is a high strength modular crate system suitable for use in a variety of applications, including: green / Blue Roofs; attenuation Systems; soakaway Systems; pavement Support Systems; for new tree planting. The high strength Polypropylene units have an internal void space of 94% and surface perforations of 63%. The system is
SFA15 A headwall, backwall height 1300
SFA15 A precast concrete headwall for connecting pipework discharging into open watercourses. Sewers for Adoption compliant. Pipework up to 750mm. Backwall height 1300mm
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
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
