ALTHON LTD

VULCAN ROAD SOUTH
NORWICH
NORFOLK NR6 6AF

Tel: 01603 488700
Fax: 01603 488598

Company Logo

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

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.

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.

 

These files are provided by the manufacturer. While Building Products Index takes every care to ensure the information is correct and up to date, we cannot be held liable for any out of date or incorrect information in them. Please check with the supplier before specifying or purchasing products.

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 Concrete
DRAINAGE CHANNEL Slotted Channel Sump Unit
DRAINAGE CHANNEL Sump Unit Silt Bucket
DRAINAGE CHANNELS Airport Runway .
DRAINAGE CHANNELS Bridge .
DRAINAGE CHANNELS BS EN 1433:2002 .
DRAINAGE CHANNELS BS EN 1433:2002 Load Classes A-F .
DRAINAGE CHANNELS Car Park .
DRAINAGE CHANNELS Cast Iron Tops Ductile Iron Gratings
DRAINAGE CHANNELS DIN EN 1433 CE Marked
DRAINAGE CHANNELS Extreme Loadings Ultra Heavy Duty
DRAINAGE CHANNELS Facade .
DRAINAGE CHANNELS Galvanised Steel .
DRAINAGE CHANNELS Glassfibre Reinforced Polyester GRP
DRAINAGE CHANNELS Heavy Duty .
DRAINAGE CHANNELS Hidden Channel .
DRAINAGE CHANNELS Industrial Applications .
DRAINAGE CHANNELS Lightweight: Loading Classes A-E DIN 19580 EN1433
DRAINAGE CHANNELS Linear .
DRAINAGE CHANNELS Linear BS EN 1433 .
DRAINAGE CHANNELS Mesh Tops Mesh Gratings
DRAINAGE CHANNELS Petrol Station .
DRAINAGE CHANNELS Precast Concrete .
DRAINAGE CHANNELS Rail Infrastructure Applications .
DRAINAGE CHANNELS Road Highway Street
DRAINAGE CHANNELS Slot Systems .
DRAINAGE CHANNELS Slot Systems BS EN 1433:2002
DRAINAGE CHANNELS Slot Systems Fire Protection
DRAINAGE CHANNELS Slot Systems Loading Classes B-F DIN 19580
DRAINAGE CHANNELS Slot Systems Precast Concrete
DRAINAGE CHANNELS Steel .
DRAINAGE CHANNELS Steel Tops
DRAINAGE CHANNELS Terraces .
DRAINAGE GULLIES .
FLOOR DRAINS Terrace .
GULLIES Polymer Concrete .
PENSTOCK Endwalls .
PENSTOCKS Sluice Gates .
ROOF TERRACE Drainage .
SEWAGE Backwater Valves .
SEWAGE Flap Valves .
SEWAGE Penstocks Sluice Gates
SEWAGE Penstocks Sluice Gates Polymeric HDPE
SPILLWAY SYSTEMS Spillway Headwalls Precast Concrete
TERRACE Drainage Systems .
WASTOP VALVE In Line .
AQUATIC Penstocks
BGZ-S Channel Drainage System
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
RSFA Precast Headwall Unit
SFA10 Precast Headwall Unit
SP10 Precast Headwall Unit
TIDEFLEX Check Valve

Althon Precast Headwall with HDPE Flap Valve

September 2018

Pictured is a precast headwall with factory fitted HDPE flap valve to the back wall. We cast in fixing points for the flap valve into the headwall during manufacture. The headwall is delivered with the flap valve loosely fitted. The flap valve is removed during installation of the headwall then simply bolted back on to the backwall when the headwall and pipe are in place. The result of this is the headwall does not need to be drilled once on site.

The wingwall profile of this headwall has been selected due to the bank profile of the site in question. The wingwalls finish higher at the front end of the spillway when compared to a typical splayed wingwall headwall.

The headwall is shown being lifted by chains and M20 lifting loops to lifting points cast into the spillway of the headwall.

Althon Precast Headwall with Diffuser Blocks

September 2018

We can produce when required precast headwalls with diffuser blocks on the spillway of the headwall. Diffuser blocks reduce the velocity of water discharging through the connecting pipework into the watercourse.

The precast headwall shown in the photo has horizontal wingwalls, required due to the bank profile on this particular project. We have also factory fitted galvanised steel Kee KlampĀ® handrail to the back and side walls to for the safety of the passing public.

The headwall is shown being lifted by chains and M20 lifting loops to lifting points cast into the spillway of the headwall.

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