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Polymer Headwalls

Permashutter Patented Polymer Headwall

Tough polymer plastic headwall moulds filled on-site with concrete, complete with ancillaries to reduce construction time to hours whilst increasing the quality of the finished outfall.

Renowned for low cost, speed and ease of installation, Permashutter headwalls are fast becoming the headwall installation method of choice across a wide variety of projects.

Available in a range of sizes, colours and stone effects. Permashutter heavy duty polymer headwalls provide a quick and cost effective alternative to casting headwalls insitu.

Headwalls are available in the following sizes:

  • HW300C - Suitable for pipe diameters: 150mm/225mm/300mm
  • HW450C- Suitable for pipe diameters: 150mm/225mm/300mm/375mm/450mmpermashutter polymer headwall mould

Unlike precast headwalls they are lightweight (before filling) and highly durable, being resistant to cracks, chips, algae or graffiti.

Headwalls can now be installed in a few hours complete with high quality accessories.

A full range of accessories such as handrails, pipeguards, trashscreens, anti-vermin grills, flapvalves etc. are all available.

 

Key Details

 
  • Handrail: Hot dipped galvanised to BS 729 after fabrication.
  • Handrail Recesses: Once the mould is full the handrail can be added by inserting into the preformed recesses. (see fig. a)
  • Environmental Impact: The concrete is placed into the mould through the slots shown in fig. a. Caps are fitted once the mould is filled.
  • Trashscreen: Hot dip galvanised to BS 729 after fabrication. It is fixed to the headwall with BZP steel bolts, and is both hinged and lockable for easy cleaning / maintenance.(see fig c)
  • Trashscreen fixing points: Bolts are inserted into pre-formed holes in the front face of the mould to anchor the pipe guard.
  •  Flap Valve Fixing Point: Bolts are inserted into the preformed locators to affix the flap valve(see fig. b)

How to order headwalls

Permashutter headwalls are available via our distributors and also direct from us.

You can obtain a quote for headwalls and ancillaries online.

Click the button and complete the online quote / order form.

Get Prices

Alternatively you may telephone us on 01604 779017

 

Headwall HW450C Technical Data

Headwall HW450C Technical Data -

Overall Dimensions: H 1625   W 7000   D 1400

Overall weight: approx. <100 kg

Material: High density PolyEthylene (HDPE)   

Manufactured to: ISO 9001

Available pipe diameters (pipe diameter shown 150mm):

The HW450C comes with collars to suit 150mm, 225mm, 300mm, 375mm or 450mm diameter pipes.
Collars are designed for Polypipe Ridgidrain pipes.

Available accessories -

Handrail: Fabricated galvanised steel to BS729

Trashscreen: Inclined ITS450C                
                       Cranked CTS450C                     
                       Vertical VTS450C

Flapvalves: Flapvalves are available in ductile iron, HDPE or Coplastic to suit pipes from 150mm to 450mm diameter

Anti Vermin Grill: Galvanised steel grill with either BZP or SS fixings

For a high resolution version of this information including detailed headwall drawings please download the datasheet PDF

headwall data sheet

Headwall HW300cTechnical Data

Headwall HW450C Technical Data -

Overall Dimensions: H-1150   W-1147   D-1150

Overall Weight: approx.<40kg unfilled. Approx 1140kg when filled with concrete. Fill: with 0.5m3 of concrete

Material: High density PolyEthylene (HDPE)  Manufactured to: ISO 9001

Available pipe diameters (pipe diameter shown 300mm):

The HW300C comes with collars to suit 150mm, 225mm, 300mm diameter pipes.
Collars are designed for Polypipe Ridgidrain pipes.

Available accessories -

Handrail: Fabricated galvanised steel to BS729

Trashscreen:Inclined ITS300C
                       Cranked CTS300C
                       Vertical VTS300C

Flapvalves: Flapvalves are available in ductile iron, HDPE or Coplastic to suit pipes from 150mm to 300mm diameter

Anti Vermin Grill: Galvanised steel grill with either BZP or SS fixings

Penstock Valves: Penstock valves are available in cast iron or HDPE to suit pipes from 150mm to 300mm diameter

For a high resolution version of this information including detailed headwall drawings please download the datasheet PDF

300C technical

How are the headwalls installed?

The installation of headwall outfalls has been vastly optimised using the patented Permashutter Polymer headwall system.

Overview:

  • The headwall has been manufactured as a tough one peice plastic mould
  • It is lightweight and easy to move
  • It has a toe for ground anchoring
  • It is delivered to site empty, placed on a bed of semi dry blinding concrete and is then filled with concrete
  • Handrails and other headwall attachments are inserted into pre-formed locators in the mould after filling and prior to the concrete setting
  • The durable and graffiti resistant headwall mould remains in position permanently

Actions:

  1. Excavate Bank to accomodate the size of the headwall allowing a minimum of 600mm for working space
  2. Locate Toe Position: Excavate trench to accommodate the toe at the rear of the headwall
  3. Prepare base: Lay a level bed of semi dry concrete and compact. A 150mm thick layer is usually sufficient. In poor ground this can be increased to suit
  4. Position Headwall: Lift the lightweight headwall into position, ensuring that the unit is level
  5. Connect to drainage pipe: Insert the drainage pipe into the collar at the back of the headwall
  6. Fill with concrete: Fill the mould in layers (300mm max). When the concrete reaches the underside of the lower filling holes, clip the covers into place. Continue filling from the upper filling hole until full and then add the cover
  7. Fit Handrail: Lift the handrail into position. Drop onto the fixing studs and tighten.

The Headwall is now complete and requires no further visits

What Ancilliaries are available?

Permashutter provide a full range of headwall ancillaries

headwall ancillaries
 
 
 
Handrails
Trashscreens
Anti-vermin grills
Flapvalves and Penstocks
 

 

 

All ancillaries can be ordered with the headwall and are installed by locating into the pre configured positions prior to filling the headwall mould with concrete.

This enables a high quality installation with only one visit.

Our ancillaries may also be ordered separately for retrospective fitting to precast or cast in situ headwall units.

Please use the order / quote form to obtain prices for you requirements. Get Prices

 

Downloadable brochures, data sheets and installation method statements

All downloadable materials for headwalls , including headwall installation method statements, data sheets, and brochures for the
Permashutter headwall range can be found in our download area.


Go to headwall downloads


 

Ask a question or make a comment.

We would be pleased to answer any questions that you may have and hear your comments.


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UK Distributors

  • We installed the polymer headwall adjacent to a live watercourse. The installation was completed in 2hrs together with a flapvalve which the headwall was designed to receive. I found the after sales advice and service from Permashutter to be first class.
    David Day, Land Structure site manager

  • I was very impressed with the Permashutter polymer headwall. It was delivered within days of being ordered and was very quick and easy to install using the small 3t excavator that I had on site. I would have had to wait 4-6 weeks for a PCC (Precast Concrete) headwall and would have also needed to import a larger excavator to install a heavy precast concrete variety. “I will definitely use polymer headwalls again in the future.
    Marcus Willcox - H2OK contracts manager

  • The polymer headwalls were simple to install and came with the flapvalves pre connected which saved additional time and money.
    Phil Godridge: TRJ Project Manager

  • My team have successfully and safely completed this project during cold and icy conditions. The Permashutter headwall solution provided an efficient and effective means of replacing a tidal outfall, using new technologies to provide cost and time savings, as well as significantly reducing health and safety risks when compared with installing traditional concrete headwalls. The lack of any heavy lifting is a real bonus as it means less plant and equipment is required on site. By successfully completing this project on time and to budget we have significantly reduced the risk of tidal flooding in this location.
    Peter Downes, Field Team Leader for the Thameside Environment Agency Operations Delivery Team

  • I am very pleased with the reduced length of time for its installation and the finished structure. We have ordered two more Polymer headwalls and Permashutter HDPE flap valves from Permashutter on the back of the Badger Bank project. I would like to thank Permashutter for their excellent customer service and fast delivery.
    Pete Winter (Environment Agency Field Team Specialist)

  • The polymer headwalls were incredibly easy and fast to install. All 4 headwalls were installed in an afternoon with 2 men and a small 3T excavator.
    Rob Kislingbury - Churngold Construction

  • I found installing the Polymer headwalls to be quick and very easy compared to casting headwalls insitu or using PCC headwall units. A huge benefit was the Polymer headwalls are designed to receive flapvalves without any need for drilling into concrete, using expensive epoxy resins or making good around the pipes. The flapvalves provided by Permashutter were simple to install and should require less maintenance than some ductile iron varieties.
    Mark Flynn (Barton Civils Project Manager)

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