Althon Limited

MAG Group Building
Vulcan Road South

  • Manufacturing precast headwalls & water management
  • Flap valves, penstocks and stop logs
  • Commercial & industrial drainage channels
  • Manufacturing precast headwalls & water management
  • Flap valves, penstocks and stop logs
  • Commercial & industrial drainage channels
Currently Closed
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Althon Limited

Concrete Headwalls & SFA Headwalls to meet Sewers for Adoption Guidelines

Althon is a specialist manufacturer and distributor of Water Management products for the construction industry in particular:

.. Headwalls
.. Flap Valves
.. Penstocks
.. Stop Logs
.. Outlay Grilles

Our design and manufacturing service also includes Precast Concrete Penstock Chambers and a vast range of Commercial and Industrial Drainage Channels.

We can produce over 300 Headwall designs of Standard Headwalls as well of offering a bespoke customisation service to better suit your specific needs.


The range of Headwalls from Althon provide a highly cost effective alternative to in-situ headwall pipework discharging into attenuation ponds, ditches, rivers and swales as well as marine and tidal environments.

.. Standard Precast Concrete Headwalls
.. Sewers for Adoption Headwalls
.. Rectangular Precast Headwalls
.. Rectangular SFA Headwalls
.. Angled Precast Headwalls
.. Culvert Precast Headwalls

SFA Headwalls

Althon offers a range of highly efficient and cost effective precast SFA (Sewers For Adoption) Headwalls designed and manufactured to comply with all guidelines.

We offer a range of various size SFA Headwalls to cater for different pipe specifications of up to 1500mm.

With three depths of toe available you will find a profile to suite most applications.


As a specialist manufacturer for the construction industry Althon is able to supply a range of both HDPE and Stainless Steel Penstocks designed to control and isolate water.

Penstocks can either be mounted directly onto an existing flat surface or factory fitted to a precast headwall or concrete penstock chamber or in line with an existing pipe installation.

The Penstocks from Althon are manufactured in HDPE and 316 grade stainless steel with a typical design life of 50 years.

Flap Valves

We offer a range of Flap Valves, Wall Mounted Flap Valves, Flange Mounted Flap Valves and Push Fit and Pipe Mounted Flap Valves.

Material specifications available include cast iron, stainless steel and HDPE.

We also manufacture Flap Valves to suit specific applications and can design and produce Bespoke Flap Valves for square, rectangular and elliptical openings.

For applications involving valves that are subject to wave action Althon can reinforce Flap Valves to suit.

For further details on all of the products and services provided by Althon Ltd please visit our website where you'll also find a 'Headwall Specification Tool' facility containing PDF and CAD drawings.

Products and Services

Opening Hours

Monday -   09:00 to 17:00
Tuesday -   09:00 to 17:00
Wednesday -   09:00 to 17:00
Thursday -   09:00 to 17:00
Friday -   09:00 to 17:00
Saturday -   Closed
Sunday -   Closed

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