Angled Headwall with Dissipation Blocks

Althon supply precast headwalls with factory fitted accessories. We have recently supplied one of our new AH4C left hand angled precast headwalls factory fitted with a 250mm HDPE flap valve and nine small diffuser blocks on the spillway.

All of our precast headwalls can be fitted with diffuser blocks on the spillway, stepped baffle blocks or cascade panels.

Our AH4C range of precast headwalls 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’.

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

AH12C Angled Headwalls

The AH12C Headwall is a two part Pcc Headwall that allows water to discharge at a 45 Deg. angle, the Environment Agency’s preferred method when discharging into a watercourse. The AH12C Headwall also complies with ‘Sewers for Adoption’ guidelines. The AH12C is available with two back wall height options, two toe thickness options both available in three depths. The AH12C A option can accommodate Twin Wall or Pcc Pipe up to & including 750mm ID and the AH12C B option can accommodate Twin Wall or Pcc Pipe up to & including 900mm ID.

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

SP Splayed Wing Wall Headwalls

Althon SP ‘Splayed Wing Wall Headwalls’ are produced with a higher wing wall at the front of the apron.  This makes them ideal for inlets or outlets where situated in locations with high/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.

There are four sizes of SP headwall available, catering for pipe sizes up to and including 1800mm. Each size of concrete headwall comes with six depths of toe and four back wall heights offering wing wall profiles to suit most applications.

All SP concrete headwalls are cast to suit the diameter and type of pipe being used and can be provided with fixings cast in at the time of manufacture to accommodate gratings, trash screens, flap valves, ladders, guardrails and flow and depth monitoring equipment.

Please visit the Splayed Wing Wall Headwalls 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

Ouse & Humber Drainage Board

Originally specified as a cast in-situ unit, two of our SFA27A Headwalls were recently supplied to the Ouse & Humber Drainage Board at Blacktoft & Laxton Pumping Stations.  PN16 Flanged HDPE/SS316L Flap Valves for pumping applications were supplied and fitted to both openings in each Headwall, threaded sockets cast in during manufacture provided fixing points and the same configuration of fixings were cast into the rear of the Headwall allowing direct connection of 600mm ID Ductile Iron Pipe.

For further information please contact our sales team by email sales@althon.co.uk or by phone on 01603 488700

Sloped Trash Screens with Sides

Althon have recently launched a standard range of both 45 and 60 degree sloped trash screens with sides for pipework from 150mm to 1500mm. Our sloped trash screens are typically manufactured in galvanised steel but can be manufactured in stainless steel on request.

As well as the sloped gratings in our standard range we offer a design service for  bespoke trash screens  to suit site specific circumstances.

Please visit the  Sloped Trash Screen 45 Degrees with Sides  or  Sloped Trash Screen 60 Degrees with Sides  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