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CONSTRUCTION DIRECTORY

Althon Limited

Althon Limited Contact Details

Telephone
Click to view
Fax
01603 488598
Contact
Mr Tim Gates
Email
Address
MAG Group Building
Vulcan Road South
Norwich
Norfolk
NR6 6AF
England UK

About Althon Limited

Althon Precast Headwalls and Water Management

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.

Precast Concrete Headwalls

Althon precast concrete headwalls offer a cost effective alternative to in-situ headwalls pipework discharging into attenuation ponds, rivers, ditches, swales and tidal environments. We have ranges of Sewers for Adoption 7th Ed. and Severn Trent Water specification compliant headwalls. We offer a range of factory fitted accessories on our headwalls such as flap valves, penstocks, Kee Klamp® handrails, baffle blocks as well as gratings and trash screens.

  • Precast Concrete Headwalls
  • Headwall Specifier
  • Standard Precast Concrete Headwalls
  • Sewers for Adoption (SFA) Headwalls
  • Rectangular Precast Headwalls
  • Rectangular SFA Headwalls
  • Angled Precast Headwalls
  • Culvert Precast Headwalls

Flow Control & Flood Prevention

Althon offer a range of specialist water management and flood prevention products such as HDPE flap valves, ductile iron flap valves, penstocks, Wastop inline non-return valves, stop logs, Tideflex duckbill and Checkmate valves. We offer flanged, wall mounted and tidal flap valves as well as wall mounted and inline penstocks.

We can factory fit most of these products to our precast headwalls or precast inspection chambers if required.

  • Penstocks
  • Flap Valves
  • Wastop Inline Non Return Valves
  • Hand Stop Gate
  • Stoplogs
  • Manhole Pipe Safety Chains
  • Orifice Plates
  • Tideflex Valves

Drainage Channel Range

The Althon drainage channel range of surface water channel drainage products caters for all types of construction sites from car parks to airports and docks. Our drainage channels cater for applications from A15 – F900 load classes.

  • High Capacity Drainage Channel
  • Polymer Concrete Drainage Channel
  • GRP Lightweight Drainage Channel
  • Light / Medium Duty Drainage Channel

SFA Outfall Safety Grilles, Trash Screens & Precast Penstock Chambers

Althon offer a comprehensive range of Sewers for Adoption, Sewers for Scotland and UU specification gratings, 45 and 60 degree sloped trash screens with the option for side returns and circular pipe mounted gratings.

We also have a range of precast concrete chambers for housing factory fitted penstocks and precast concrete end walls with fitted penstocks or flap valves.

  • Sewers For Adoption Outfall Safety Grilles
  • Sloped and Circular Trash Screens and Gratings
  • Precast Concrete Penstock Manhole Chambers
  • Precast Concrete Penstock Endwalls

Althon Ltd are part of the MAG Group of Companies

MAG Group Limited is a privately owned UK based business operating since 1982. MAG Group has 6 subsidiary companies concentrating on the manufacture and supply of specialist products for the construction industry and retail markets.

We employ around 70 people and have a customer base throughout the UK and worldwide having traded in over 50 countries to date. MAG Group Limited anticipates significant growth in 2018 with Group turnover set to exceed £17 million.

If you have any more questions or enquiries please Contact Us

Gallery

Videos

News
23/05/2022
NEW R7C Headwall Range

We are pleased to announce we have a new R7C rectangular headwall range which are the ideal option for highways applications. The R7C headwalls for motorways and other road projects can be factory fitted with accessories such as handrails, trash screens, flap valves and penstocks. The headwalls are available in 3 backwall heights and a range of wingwall profiles.

For more information on the range of headwalls please visit https://www.althon.co.uk/products/r7c-headwall-range/ or if you cannot find what you are looking for, email us sales@althon.co.uk or call us on 01603 488700 and we will be happy to help.
22/03/2022
Some great product benefits of our precast headwalls

? Designed to BS EN 1992-1-1 (EC2) standards
? Manufactured to BS EN 15258 & BS EN 13369 standards
? Severn Trent Water specifications for rectangular precast outfalls
? Anglian Water approved headwalls
? Angled ranges that meets the Environment Agency’s ‘Standard rules SR2015 No 27’
? Selected ranges meet the Sewers for Adoption 7th Edition guidelines to be adopted by local Water Authorities & comply with the Water Industry Regulations 2011
? Factory fitted accessories
? Fast and easy to install
? Design life to either 50 or 120 years

For more information on the types of headwalls we offer please visit https://www.althon.co.uk/products/headwalls/or if you cannot find what you are looking for, email us sales@althon.co.uk or call us on 01603 488700 and we will be happy to help.
07/03/2022
Althon Headwall in Iraq

Althon headwall with factory fitted ductile iron flap valve and stainless steel handrail installed in Basra, Iraq.

For more information on the types of headwalls we offer please visit our headwalls section or if you cannot find the headwall you are looking for use our design form, email us sales@althon.co.uk or call us on 01603 488700 and we will be happy to help.
15/02/2022
Custom built GMS cranked grating, mesh catwalk and handrail

At Althon we can offer standard and custom built gratings to suit any of our precast concrete headwalls. All gratings, catwalks and handrails can be custom designed and built to suit any site requirements. The gratings will then be factory fitted to our headwalls to make sure they fit, only being removed for delivery loading/offloading purposes.

The image shows one of our standard RSFA headwalls with a custom built rakeable cranked grating, mesh catwalk for standing on and added handrail for protection. The photo was taken before the metal work had been galvanised.

For more information on our standard headwalls are gratings please visit our website or use our design form, email us sales@althon.co.uk or phone us on 01603 488700 and we will be happy to help with your requirements.
17/01/2022
Reducing our carbon footprint

In 2021 Althon saved 626 tonnes carbon by using GGBS as cement substitute. We are committed to reducing our carbon footprint and are constantly looking into new products and methods of production and delivery to help us achieve this.

Concrete suppliers and designers, and in turn their clients and customers, can use concrete to minimise carbon footprints by: optimising mix, the efficient use of materials and recognising the carbon uptake potential of concrete to permanently sequester CO2 in buildings. Concrete can also be reused and at end of life is 100% recyclable.
15/12/2021
Headwalls with Orifice Plates

Althon have recently supplied several SFA headwalls (headwalls that are compliant with Sewerage Sector Guidance) factory fitted with bespoke orifice plates. Orifice plates can be manufactured in either galvanized or stainless steel and they are designed to restrict and regulate the flow of water. We can manufacture the orifice plates to suit multiple openings or one opening in any position required on the plate.

In this instance the customer was using a 1200mm ID pipe coming into the back of the headwall and wanted 3No. 73mm, 87mm and 103mm holes in the orifice plate to restrict the flow. We also then added stitch welds to strengthen the plate.

For more information on orifice plates please visit Orifice Plates, email us sales@althon.co.uk or call us on 01603 488700.
13/12/2021
Welded and Powder Coated Handrail

We can factory fit Handrail to any of our precast concrete headwalls and our standard is Galvanised Kee Klamp ® size 8 fittings which complies with Civil Engineering Specification for the Water Industry (CESWI) 7th Edition Clause 2.60 Handrails & Balusters & The Engineering Equipment and Materials Users' Association (EEMUA) Publication 105 7th Edition Factory Stairways, Ladders and Handrails.

However on request we can also make welded handrail which can then be powder coated in any RAL colour that is required. For more information on using a different handrail please email sales@althon.co.uk
06/12/2021
Bespoke headwall and grating

The headwall and grating shown are a bespoke design based on a clients sketch for a project in Downderry, Cornwall. The headwall only required 1 wingwall due to the customer wanting a concrete footpath on the right hand side that the headwall would then butt up against. The trash screen required a working platform for maintenance purposes and is manufactured to BS EN 1090 standards.

For more information on the types of headwalls we offer please visit our headwalls section or if you cannot find the headwall you are looking for use our design form or email us sales@althon.co.uk
22/11/2021
Large RSFA Headwalls

We already have a range of RSFA headwalls which have been designed in accordance with Severn Trent Water Standard details STD6002 for pipework up to 600mm & a back wall height of 1100mm. However, we have had a lot of requests for rectangular headwalls for larger pipe sizes & taller back wall heights. With the increase in height Severn Trent Water require steps for access rather than a ladder. The image below is a recent bespoke headwall we have manufactured to suit a 1200mm PCC pipe, factory fitted with a SFA1 1200 Outfall Safety Grille, Steps and Kee Klamp Handrail. If you require a headwall that you cannot find on our website please contact us by using our design form, email us sales@althon.co.uk or call us on 01603 488700
01/11/2021
Approved Mammal Shelf to be used on HS2

Althon have recently been approved to supply mammal shelves to the Align/ HS2 project.

HS2 projects require the fixings to comply with stringent material specifications which our mammal shelves comply too. To date we have already supplied 42metres of mammal shelves which will help keep the badgers safe.

For more information on our mammal shelves and ledges please visit https://www.althon.co.uk/products/mammal-shelves-ledges/, email us sales@althon.co.uk or call us on 01603 488700 and we will be happy to help.
21/09/2021
Bespoke Angled Headwall

Althon have recently supplied a large headwall to accommodate a 1500mm ID pipe factory fitted with HDPE flap valves and bespoke sections.

For this project we were able to use one of our standard narrow headwalls with two extension pieces cast on the left hand side to create the angled spillway the customer required.

If you cannot find a design you are looking for please use our Design Service, email us sales@althon.co.uk or call us on 01603 488700 and we will be happy to help.
03/11/2020
Althon CPD course now available - 'Specifying the right headwall for your application'

Althon are pleased to announce our new CPD certified course ‘Specifying the right headwall for your application’. The primary focus of the course is to help engineers and specifiers with identifying the correct headwall for their application, including information on where you would use Sewers for Adoption headwalls and how to make sure you are compliant with a section 104 agreement.

The course is also relevant to our Builders’ Merchant client base, to enhance knowledge regarding headwalls and to enable them to assist their customers in depth.

Althon also wish to raise awareness of the different accessories that can be both pre and retro-fitted onto headwalls, to aid with water management. These include flap valves, penstock gates, Wastop and Tideflex valves alongside Kee Klamp hand rails and many more.

The course covers in detail the critical dimensions that you need to know in order to the select the correct headwall and or/accessories. A checklist is provided, so that customers can make sure they’re getting the required details when liaising with clients. This course counts towards continued professional development and a certificate of attendance if available for each delegate.

If you're interested in completing this course please e-mail cpd@althon.co.uk or phone 01603 488700
07/08/2020
New Vermin Gratings

Althon have just launched two new Vermin Gratings, the pipe mounted vermin gate in 304 stainless steel and also the vermin mesh grille PN16 flange in 316 stainless steel.

Pipe mounted vermin gates in 304 stainless steel are hinged at the top to allow passage in the direction of flow but will prevent rats and other vermin climbing back up the pipe.

Vermin mesh grilles with a PN16 flange in 316 stainless steel are designed to fit between two flanged pipes or fittings, or at the end of a flanged pipe run to prevent rodents and other vermin entering connecting pipework.

For more information or for pricing please contact our sales team by email sales@althon.co.uk or by telephone on 01603 488700
17/07/2020
Narrow Headwalls with Large Flap Valves

Althon have recently supplied a large narrow headwall to accommodate two 1200mm ID pipes factory fitted with HDPE flap valves for a project near Glasgow.

For this project we were able to use on of our standard narrow headwalls with an extension piece cast in the middle to create the width the customer required.

We can cast multiple pipe openings into any of our headwalls but if you cannot find a design you are looking for please use our Design Service, email us sales@althon.co.uk or call us on 01603 488700
08/06/2020
Mammal Shelves & Ledges

Althon have just launched a new range of mammal ledges in GRP and mammal shelves in HDPE.

Mammal shelves and ledges can be installed on new or existing culverts and allow animals such as badgers, otters and other wildlife to pass through culverts or under bridges reducing the risk of drowning in the culvert or river.

Please visit the https://www.althon.co.uk/products/mammal-shelves-ledges/ section of our website for more information or for pricing please contact our sales team by email sales@althon.co.uk or by telephone on 01603 488700
04/06/2020
Certified CPD Member

Althon Limited are pleased to announce that they are now a certified CPD Member. As a company we believe assisting others to continue their lifelong learning journey is a privilege; it enables people from a plethora of backgrounds to increase their knowledge and enhance their professional capabilities. We will be providing a range of courses to enable designers and specifiers to select the correct headwall and accessories for their application. Alongside this, we will be developing relationships with our Builders Merchant partners to enable them to assist our customers further through dedicated training. All courses will be certified for accrual towards individual CPD requirements.

Contact cpd@althon.co.uk for further details or telephone 01603 488700.
06/03/2020
Anglian Water Approved Headwalls

Althon Ltd are pleased to announce that their ‘Sewers for Adoption’ range of Headwalls have been approved for use on projects that are to be adopted under a Section 104 agreement by Anglian Water Services Ltd.  Althon can advise on the most appropriate product from our range to suit the site requirement.  The full range of acceptable Headwalls are available to view drawings and download here.  Consultants should specify the particular Headwall they intend to use when making their application allowing Anglian Water Services to review and ensure it is fit for purpose in the location proposed.  If you are unable to find a Headwall that meets you specific site requirements we are able to offer modifications to our standard Headwalls or can produce bespoke units, please contact our sales office on 01603 488700 or sales@althon.co.uk for further information.
07/02/2020
Bespoke Headwall at Mauldslie WWTW

Althon have recently supplied a bespoke precast headwall retaining wall at Mauldslie WWTW.
The headwall was manufactured to accommodate multiple pipe openings and to site specific dimensions.
The headwall was offloaded and installed by the contractor within the space of a morning.
If you require a bespoke precast headwall please use the Headwall Design Tool or email sales@althon.co.uk for more information on how Althon can help.
06/01/2020
Headwall Design Tool

Althon have launched a Headwall Design Tool to enable you to specify the headwall you require with associated factory fitted accessories.

We have produced a Headwall Design Request Form where you fill out as much information as possible. We will then send you a CAD & PDF drawing of your chosen headwall and will liaise with you to further refine the design to suit your specific requirements if required.

Headwall accessories include but are not limited to flap valves, penstocks, cascade panels, dissipation blocks, V notch weirs, handrails, gates & ladders.
16/12/2019
Headwall Brochure

Althon have released an updated headwall brochure giving a detailed overview of our range of precast headwalls.

The brochure was produced for the FloodExpo 2019 at which Althon exhibited. The brochure not only gives details on our range of concrete headwalls but also our other products such as flap valves, penstocks and drainage channels.

A copy of our new brochure can be downloaded here
10/12/2019
Headwalls with Cascade Panels

Althon have recently manufactured a precast concrete headwall complete with a 8.5m long cascade panel for a project in Sunderland.

You can use the Althon Headwall Specifier to find the headwall you require. Althon can then assist with pricing and design drawings detailing Cascade panesl on our headwall drawings in CAD and PDF

You can also visit the Precast Concrete Headwalls section of the website or call on 01603 488700
20/11/2019
Headwalls with Tideflex Valves

Althon can manufacture concrete headwalls with Tideflex duckbill valves. We factory fit the duckbill valves to our precast concrete headwalls ensuring they fit properly and reducing installation time on site. Factory fitting duckbill valves to headwalls also means the headwalls do not have to be drilled on site which has great health and safety benefits.

You can the Althon Headwall Specifier to find the headwall you require. Althon can then assist with pricing and design drawings detailing Tideflex valves on the headwall drawings in CAD and PDF

You can also visit the Precast Concrete Headwalls section of Althon's website or call us on 01603 488700
14/05/2019
Headwall BIM Objects

Althon have just launched BIM objects available to download from the Headwalls section of the website in .rfa .ifc and .adsk other file types available on request.

If you cannot find the drawing you require in 3D please email sales@althon.co.uk

Visit The Althon Headwalls Website
22/03/2019
Sewers For Adoption Headwalls For Marina

Althon have recently supplied 2No. SFA27D Headwalls with bolt on toes to suit 1200mm dia concrete pipes to Upton upon Severn Marina.

All Althon SFA headwalls and toes are cast with lifting points for easy and quick offloading, transporting and installing into their final position. No need for any specialised lifting equipment just standard lifting hooks are chains are need to move the headwalls and toes.

You can use the Althon Headwall Specifier to find the headwall you require. We can then assist with pricing and design drawings detailing an appropriate headwall.

You can also visit the Precast Headwalls section of our website.
20/03/2019
Precast Headwall Sizes UK's Largest Range

Althon manufacture precast concrete headwalls to suit any pipework. We cast the openings into our headwalls to suit the OD of the specified pipework.


Headwalls can be factory fitted with gratings, flap valves, penstocks, handrails and other accessories.

You can use the Headwall Specifier to find the headwall you require. Althon can then assist with pricing and design drawings detailing an appropriate sized headwall


You can also visit the Precast Concrete Headwalls section of Althon's website

25/10/2018
Box Culvert Headwalls

Althon has new range of precast concrete Box Culvert Headwalls to suit a maximum internal box culvert of 2650mm wide x 1750mm high. All of Althon's CSP Culvert headwalls can be factory fitted with gratings, flap valves, Kee Klamp handrail, penstocks and other flow control devices. Toe depths are also available up to 1000mm and come in thickness of 300 or 500mm.

Please visit the Precast Headwalls for Culverts section of Althon's website for more information or Precast Concrete Headwalls for our entire headwall range. For pricing please contact the Althon Sales Team by email sales@althon.co.uk or by telephone on 01603 488700

11/09/2017
AH4C Angled Headwalls

AH4C Angled Headwalls

The AH4C Angled headwall has been designed specifically to meet the Environment Agency’s ‘Standard rules SR2015 No 27 –

Constructing an outfall pipe of 300mm diameter through a headwall into a main river & Exempt flood risk activities: environmental permits section FRA12 ‘Outfall pipes less than 300mm diameter through a headwall’.  The AH4C allows water to discharge at a 45 Deg. angle, the Environment Agency’s preferred method when discharging into a watercourse.  Available with three different back wall heights and a separate Toe in three depth options that ensure not only is it easier to handle but easier to install & more importantly ensures the foundation around the toe and beneath the Headwall structure can be well compacted.

Please visit the Angled Headwall section of our website for more information or for pricing please contact our sales team by email sales@althon.co.uk or by telephone on 01603 488700
Products & Services

SFA Headwalls

Standard Headwalls

Angled Headwalls

Precast Concrete Headwalls

Penstocks

Flap valves

SFA Gratings & Trash Screens

Concrete penstock chambers

Inline non return valves

Tidal flap valves

Penstock chambers

Concrete chambers

Trash screens

Gratings

Wastop

Wingwalls

Drainage channel

Althon Limited General Description

Althon specialise in the design, manufacture and distribution of drainage products for the management, treatment, isolation and control of water. Our range of products includes Althon precast concrete headwalls, HDPE, cast iron and stainless steel flap valves, penstocks and stop logs
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