ALTHON LTD

VULCAN ROAD SOUTH
NORWICH
NORFOLK NR6 6AF

Tel: 01603 488700
Fax: 01603 488598

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.

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.

 

CHANNEL GRATINGS Cast Iron
CHANNEL GRATINGS Ductile Iron
CHANNEL GRATINGS Linear Drainage Channels
CHANNEL GRATINGS Steel
CHANNELS Slotted
CHECK VALVES Elastomer
CULVERT Headwalls Precast Concrete
CULVERT Headwalls Specialist Fabricators
DRAINAGE Headwalls Accessories
DRAINAGE Headwalls Concrete
DRAINAGE Headwalls GRC
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
FLOOR DRAINS Terrace
GULLIES Polymer Concrete
INSPECTION CHAMBERS Drainage
INSPECTION CHAMBERS Precast Concrete
PENSTOCK Endwalls
ROOF TERRACE Drainage
SEWAGE Backflow Stops
SEWAGE Flap Valves
SEWAGE Penstocks
SEWAGE Penstocks Polymeric HDPE
SILT TRAPS Silt Trap Inlets Reinforced Concrete
SPILLWAY SYSTEMS Spillway Headwalls Precast Concrete
TERRACE Drainage Systems
UNDERGROUND DRAINAGE Inspection Chambers
WASTOP VALVE In Line
AQUATIC Penstocks
BGZ-S Channel Drainage System
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
TIDEFLEX Check Valve
TIDEFLEX CHECKMATE Inline Check Valves

Circular Pipe Mounted Gratings

June 2024

When you don't have a flat surface to fix to we can fabricate a hinged lockable pipe mounted grating. Ideal for bagwork or vegetated headwalls and made to suit your pipe diameter. Available in both galvanised and stainless steel
The gratings in the photos have been installed at a Wildlife Park in Suffolk
For more information please contact our sales team by emailing sales@althon.co.uk or call us on 01603 488700

SFA Inlet and Outlet Headwalls

April 2024

We have just launch a new section to our website for SFA Inlet and Outlet headwalls

✔️ All of our Sewers for Adoption (SFA) headwalls fully comply with the Design and Construction Guidance for foul and surface water sewers offered for adoption under the Code for adoption agreements for water and sewerage companies operating wholly or mainly in England, Sewerage Sector Guidance (SSG) Part C.

✔️ Compliance includes wall thickness, depth and thickness of toe options, back wall width to accept correctly sized outfall safety grille & wing wall profiles to suit bank slope.

✔️ Our headwalls are designed to BS EN 1992-1-1 & manufactured to BS EN 15258:2008 precast concrete products – Retaining wall elements. They are also covered by Factory Production Control certificate number: 0086-CPR-650448 which means they are UKCA marked.

For Inlet headwalls with a sloped spillway please visit our website

For Outlet headwalls with a flat spillway please visit our website

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