ALTHON LTD

VULCAN ROAD SOUTH
NORWICH
NORFOLK NR6 6AF

Tel: 01603 488700
Fax: sales@althon.co.uk

Company Logo

Suppliers of: Headwalls, precast concrete Headwalls,RSFA Headwalls, Angled Headwalls, rectangular Headwalls, splayed wing Headwalls, Swale Inlet Headwalls, Drainage Channels, linear drainage, slot drainage, heavy duty drainage channels, checkvalves

Althon Ltd manufacture and distribute specialist water management products to the construction industry.

We design and manufacture precast concrete headwalls to meet Sewers for Adoption and Severn Trent Guidelines. Our product range includes flap valves, penstocks and stop logs as well as trash screens and outfall safety grilles. Althon also manufacture precast concrete penstock chambers and offer a large range of commercial and industrial application drainage channels.

BIM Files available to download

Althon has an extensive range of BIM files covering all types of Headwalls. Please click here to access their BIM Library

Main Products & Services:

Precast Concrete Headwalls

Precast concrete headwalls offer a cost effective alternative to in-situ structures for pipework & concrete box culverts discharging into open watercourses such as rivers, ditches, ponds, swales and tidal environments. Althon have the largest range of precast concrete outfalls & spillways available in the UK, with models that meet Sewers for Adoption guidelines, a range of rectangular models conforming to Severn Trent Water specifications with an array of wingwall profiles, backwall widths and heights as well as being able to offer bespoke precast outfall and wingwall solutions.

Sewers for Adoption (SFA) Headwalls

Althon Sewers for Adoption precast headwalls should be used when part of a Section 104 Agreement and the sewers are to be adopted once completed by the local Water Company. The materials used and installation must comply with the ‘Sewers for Adoption’ guidelines.  Althon precast concrete outfalls offer a cost effective alternative to in-situ structures for connecting pipework discharging into open watercourses.

Headwall Specifier Tool

The Althon headwall specifier has been designed to help you select the most appropriate headwall for your project. Once you have found the right product model for your project you can download CAD and PDF files of your headwall complete with all relevant accessories as well as brochures and datasheets.

Rectangular Sewers for Adoption (RSFA) Concrete Headwalls

Althon Rectangular Precast Headwalls are Sewers for Adoption compliant precast concrete headwalls for outfalls discharging into ponds, swales, ditches beaches and rivers. RSFA precast headwalls come with the option of two thicknesses of toe, 300mm and 500mm, each of which is available in three depths. Althon manufacture RSFA precast headwalls with three different wall profiles to suit the gradient of the bank as follows 1 : 1 slope, 1 : 2 slope and 1 : 3 slope. RSFA precast concrete headwalls are typically supplied complete with Kee Klamp® Handrail to the back wall and horizontal sections of the wing walls, a galvanised steel access ladder and a self-closing gate with padlock facility above.

Angled Precast Headwalls

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. We cast the openings in our headwalls to suit your pipe diameter and material. We will also set the invert level of the pipe into the concrete headwall to your specification if required. We can also cast in multiple pipe openings if required.

Rectangular Headwall Range

Althon offer a large range of rectangular precast concrete headwalls for pipework discharging into ponds, swales ditches, rivers and tidal environments. Our rectangular headwalls are available in a range of backwall widths and heights for pipework up to 750mm.

Precast Headwalls for Culverts

Our precast headwalls for culverts offer a Cost Effective alternative to in-situ structures for connecting Pipework discharging into Open Watercourses. All Drainage pipes discharging into Open Watercourses, such as Swales, Ditches, Ponds and Rivers, should be fitted with an appropriate Althon Headwall. Althon Headwall units can be Pre-Fitted with a Range of Accessories such as Flap Valves, Penstocks, Kee Klamp Handrails and a selection of Gratings dependant on application.

Precast Headwalls with Penstocks

Althon precast headwalls can be supplied to site with factory fitted penstocks. As standard we offer penstocks fitted to our headwalls to suit pipework from 100 up to 1500mm. When required we can offer bespoke sized penstocks or headwalls to accommodate penstocks.

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 weir wall. Althon SP precast concrete headwalls offer a cost effective alternative to in-situ structures for connecting pipework discharging into open watercourses.

SFA Headwalls with Precast Steps

Althon offer precast concrete Sewers for Adoption compliant headwalls complete with precast concrete steps. Typically our precast headwalls with steps will be supplied with an appropriate Sewers for Adoption compliant outfall safety grille and galvanised steel Kee Klamp® handrailing with gated access.

Flow Control & Flood Prevention

Althon offers a range of HDPE, cast iron and stainless steel products for flood prevention and the effective control and management of water. Althon flow controls include flap valves, penstocks, stop logs and a range of inline check valves such as the Wastop and Checkmate. Several of the Althon flow controls can be pre-fitted to our precast concrete headwall units, saving time on-site and avoiding potentially dangerous installation scenarios. Althon also offers the full catalogue of Tideflex duckbill valves.

Drainage Channel Range

Althon channel drainage range of surface water drainage products caters for all types of construction site circumstances. Products include concrete slot drainage channels, GRP drainage channel, polymer concrete drainage channel and concrete drainage channels. Althon’s drainage channel products have been developed to be lightweight, easy to transport and quick to install and maintain. The Althon linear drainage channel range has been optimised for stability, discharge capacity and longevity for a range of applications and load classes, from A15 through to F900. We offer drainage channels for use in residential environments through to heavy industrial applications such as docks and airports.

Further Technical information is available to download from the BPi Download Library or from the Manufacturer’s own website.

 

ANTI-FLOOD VALVES Duckbill Valves
ANTI-FLOOD VALVES Rodent Protection
ANTI-FLOOD VALVES Sewage Backflow Prevention
CHANNEL GRATINGS Cast Iron
CHANNEL GRATINGS Ductile Iron
CHANNEL GRATINGS Linear Drainage Channels
CHANNEL GRATINGS Steel
CHANNELS Slotted
CHECK VALVES Elastomer
CHECK VALVES In-Line
CULVERT Headwalls Precast Concrete
CULVERT Headwalls Specialist Fabricators
CULVERT Mammal Shelves and Ledges
DRAINAGE Backflow Valves
DRAINAGE Headwall Applications: Accessories and Fittings
DRAINAGE Inspection Chambers
DRAINAGE Outfall Safety Grilles
DRAINAGE CHANNEL Lid Units GRC Formers For In-Situ Concrete Casting
DRAINAGE CHANNEL Lid Units Precast Concrete
DRAINAGE CHANNEL Lid Units Precast Concrete C250 Loading
DRAINAGE CHANNEL Lid Units Precast Concrete Combined Kerb
DRAINAGE CHANNEL Lid Units Precast Concrete D400 Loading
DRAINAGE CHANNEL Lid Units Precast Concrete For Flush Macadam Finishes
DRAINAGE CHANNEL Lid Units Precast Concrete Grating Incorporated
DRAINAGE CHANNEL Sump Units Silt Bucket
DRAINAGE CHANNELS Airport Runway
DRAINAGE CHANNELS Bridge
DRAINAGE CHANNELS BS EN 1433
DRAINAGE CHANNELS BS EN 1433:2002
DRAINAGE CHANNELS BS EN 1433:2002 Load Classes A-F
DRAINAGE CHANNELS Car Parks / Parking Areas
DRAINAGE CHANNELS Cast Iron Tops Ductile Iron Gratings
DRAINAGE CHANNELS DIN EN 1433 CE Marked
DRAINAGE CHANNELS Extreme Loadings Ultra Heavy Duty
DRAINAGE CHANNELS Facades
DRAINAGE CHANNELS Galvanised Steel
DRAINAGE CHANNELS GRC Glassfibre Reinforced Concrete
DRAINAGE CHANNELS GRC Glassfibre Reinforced Concrete High Capacity
DRAINAGE CHANNELS GRC Glassfibre Reinforced Concrete Precast Concrete Lid Units
DRAINAGE CHANNELS GRP Glassfibre Reinforced Polyester
DRAINAGE CHANNELS Heavy Duty
DRAINAGE CHANNELS Hidden Channel
DRAINAGE CHANNELS High Capacity
DRAINAGE CHANNELS Industrial Applications
DRAINAGE CHANNELS Lightweight: Loading Classes A-E DIN 19580 EN1433
DRAINAGE CHANNELS Linear
DRAINAGE CHANNELS Mesh Tops Mesh Gratings
DRAINAGE CHANNELS Petrol Station
DRAINAGE CHANNELS Polymer Concrete
DRAINAGE CHANNELS Polymer Concrete Monocast / Monolithic Slot Design
DRAINAGE CHANNELS Polymer Concrete Recycled Materials Incorporated
DRAINAGE CHANNELS Precast Concrete
DRAINAGE CHANNELS Rail Infrastructure Applications
DRAINAGE CHANNELS Road
DRAINAGE CHANNELS Slot Systems
DRAINAGE CHANNELS Slot Systems BS EN 1433 Loading Class A15
DRAINAGE CHANNELS Slot Systems BS EN 1433 Loading Class B125
DRAINAGE CHANNELS Slot Systems BS EN 1433 Loading Class C250
DRAINAGE CHANNELS Slot Systems BS EN 1433:2002
DRAINAGE CHANNELS Slot Systems DIN 19580 Loading Classes B - F
DRAINAGE CHANNELS Slot Systems Fire Protection
DRAINAGE CHANNELS Slot Systems Precast Concrete
DRAINAGE CHANNELS Slot Systems Sump Units
DRAINAGE CHANNELS Steel
DRAINAGE CHANNELS Steel Tops
DRAINAGE CHANNELS Terraces
DRAINAGE GULLIES
FLAP VALVES Sewage
FLOOD PREVENTION Water Flow Control, Containment and Isolation Equipment
FLOOR DRAINS Terrace
GATE VALVES
GULLIES Polymer Concrete
HEADWALLS Fittings and Accessories
HEADWALLS GRC
HEADWALLS Precast Concrete
HEADWALLS Purpose Made
INSPECTION CHAMBERS Drainage
INSPECTION CHAMBERS Precast Concrete
NON-RETURN VALVES Stainless Steel
PENSTOCK CHAMBER SYSTEMS
PENSTOCK ENDWALLS
PENSTOCK FLOW CONTROLS
PENSTOCK VALVES
PIPE FLOW CONTROLS Flow Control Systems
RAINWATER MANAGEMENT SYSTEMS Attenuation Systems Flow Control Devices
ROOF TERRACE Drainage
SEWAGE Backflow Stops
SEWAGE Flap Valves
SEWAGE Flow Control Equipment
SEWAGE Penstocks
SEWAGE Penstocks Polymeric HDPE
SEWAGE Stop Gates
SEWAGE PIPES Backflow Valves
SILT TRAPS Silt Trap Inlets Reinforced Concrete
SPILLWAY SYSTEMS Spillway Headwalls Precast Concrete
STOP GATES Water Containment and Isolation
STOP GATES Water Containment and Isolation Hand Stop Gate Valves
STOP LOGS Water Containment and Isolation
STORMWATER Flow Controls
STORMWATER Flow Controls Flow Control Valves
STORMWATER Penstock Chambers
STORMWATER Sewage Systems Flow Control Valves
SURFACE WATER MANAGEMENT Flow Control
SUSTAINABLE URBAN DRAINAGE SYSTEMS (SUDS) Swale Inlet Units
TERRACE Drainage Systems
UNDERGROUND DRAINAGE Inspection Chambers
WATER FLOW CONTROLS Stormwater Management
AQUATIC Penstocks
BGZ-S Channel Drainage System
CHECK-FLEX G5 Inline Check Valves
CHECKMATE Inline Check Valves
CHIEFTAIN Inspection Chambers
CLIPFIX Drainage Channel Covers
FORMA Channel Drainage Lid Units
FORSHEDA Seals
GRASPOINTNER Drainage Systems
H28C Precast Headwall Unit
MEADRAIN Channel Grating
MEARIN GRP Drainage Channel
MEARIN EXPERT GRP Drainage Channel
MEARIN PLUS GRP Drainage Channel
PROFIX Grate Safeguard
R10C Precast Headwall Unit
R18B Precast Headwall Unit
R7C Precast Headwall Unit
RSFA Precast Headwall Unit
SFA10 Precast Headwall Unit
SP10 Precast Headwall Unit
STILPRO Channel Drainage Lid Units
STOP SILENT LIGHT Backflow Checkvalves
SUPREME Polymer Concrete Drainage Channels
TECHWOOD Stop Logs
TIDEFLEX Check Valve
TIDEFLEX CHECKMATE Inline Check Valves
WASTOP Inline Check Valves

Althon Ltd - Factory fitting accessories to our precast concrete headwalls

February 2025


Althon are able to pre-fit a wide range to accessories to our precast concrete headwalls, this means the concrete does not have to be drilled on site. Saving time on the installation and has great health and safety benefits.

Wherever possible we will deliver our headwalls with all factory fitted accessories still attached for faster offload and installation.

☑️ Flap Valves
☑️ Penstocks
☑️ Gratings, Outfall Grilles and Trash Screens
☑️ Kee Klamp, Gates, Ladders and Catwalks
☑️ Dissipation Blocks
☑️ Stepped Baffle Blocks
☑️ Cascade Panels
☑️ Tideflex Duckbill Valves
☑️ Orifice Plates
☑️ Stop Logs
☑️ V Notch Weir
☑️ Pond Liner Brackets
☑️ Dovetails Slots for Cladding



or more information on the headwalls we offer please visit our website, email sales@althon.co.uk or call us on 01603 488700 and we will be happy to help.

Althon Ltd - Headwall Specification Tool & Drawing Download Library

January 2025

Althon offer an extensive range of Precast Concrete Headwalls for you to choose from with a multitude of fitted headwall accessories. Our specification tool helps you find exactly what you need with downloads instantly available. We also offer a free of charge design service.


Once you have found the right product model for your project you can simply download CAD and PDF files of your headwall complete with all relevant accessories as well as brochures and datasheets.

Telephone: 01603 488700
Email: sales@althon.co.uk
Website: www.althon.co.uk

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