PDM are the leading distributor in Scotland of drainage and heavy side solutions to the housebuilder and groundworker market, specialising in plot drainage, attenuation and ground stabilisation solutions. Our large stockholdings and dedicated fleet ensure that your site is serviced with project quantities when and where you want it.

We pride ourselves in offering the right solution, for the right project; send us your site drawings and will not only take off the material, but we will offer you value added solutions that not only reduce the costs on site, but also provide significant benefits in terms of health & safety, environmental and/or installed cost.

We stock a comprehensive range of underground drainage pipe & fittings from 110mm to 300mm for delivery or collection, we also keep in stock an extended range of standard and twin all ducts and chambers.

We are “Expert & Assured”, we are the experts in offering added value solutions, with the assurance of dealing with a leading distributor that puts its customers at the heart of its operation.

Please find below just some of the products that we supply to the residential sector.

  • Plot Sewer and Surface Water Drainage
  • Attenuation
  • Concrete Pipe &Rings , L Walls and Headwalls
  • Ducting & Chambers
  • Geotechnical and Ground Engineering
  • Flag , Kerb and Pavior Blocks
  • Street Furniture
  • Utility Pipework and Fittings
  • Aboveground Pipework and Fittings
  • Cast Iron and Timesavers

For all your Building, Civils, Multi Utility, Aboveground, Building & Plumbing needs

Whether it is heavyside ,timber, dry lining, soil and waste systems, below ground drainage, hot and cold plumbing systems, underfloor heating or rainwater harvesting, we have all the product solutions.




Timber – Sheet & Carcass
Doors & Windows
Insulation & Dry Lining
Aggregates – Decorative & Building

Roofing Lead
Landscaping including Pavier Blocks
Masonry Support
Flag & Kerb

Boilers & Radiators
Hot & Cold Water Systems



Concrete Drainage – Pipes & Rings
Municipal Castings
Pressure Pipe Systems

Polyethylene & Ductile Iron & Valves
Utility Ducting
Channel Drainage
Cast Iron & Plastic Rhone

Soil & Rainwater & Waste
Surface Water Drainage & Gravity Sewer Systems
Attenuation Systems & Rainwater Harvesting
Flag & Kerb including. Aggregates

Cast Iron and Timesavers
Hot & Cold Water Systems

Copper & Lead



Polystorm Geocellular System for deep applications, the tried and tested Polystorm geocellular range is designed to provide surface water retention, surface water attenuation or surface water infiltration at a variety of depths.
The Polystorm geocellular range is ideally suited to deeper applications and can accommodate a wide range of traffic loadings, from pedestrianised areas to large HGV parks.

The Polystorm geocelluar system can also be integrated with Permavoid systems.
The modular cells combine to provide water storage structures to help with localised flood alleviation and surface water management. Each cell has a 95% void ratio and provides a highly efficient water retention, attenuation or infiltration solution.

  • Polystorm Geocellular Features & Benefits
  • 95% void ratio providing greater water storage capacity with reduced excavation and disposal costs
  • 3D flow throughout the structure removes the need for distribution pipes
  • Access for inspection and maintenance can be facilitated by the inclusion of Polystorm Access and Inspect
  • BBA Approval for Polystorm-R, Polystorm Lite and Polystorm. BBA pending for Polystorm Xtra
  • Modular units allow flexibility of shape, ideal for narrow strips or restricted areas
  • Lightweight yet robust, affording excellent Health and Safety and installation benefits
  • Unique rounded corners for ease of use and reduced likelihood of membrane punctures
  • Load bearing capacity from 20 to 83 tonnes per square metre
  • Suitable for non-trafficked, trafficked or heavily trafficked applications
  • Suitable for retention, attenuation and infiltration systems
  • Up to 60 year design life
  • The modular cells are manufactured from polypropylene
  • 100% recyclable at the end of its service life

General Groundwork

BS EN 124:2015 “Gully tops and manhole tops for vehicle and pedestrian areas. Parts 1 to 6.” • Contains the essence of the 1994 standard together with the introduction of some new, additional tests. For iron castings, these additional tests comprise of cover stability under edge loads and resistance to unauthorised chamber access by minors. • Separate requirements for products made of different materials. • This standard is published and available for purchase from BSI. • The European Commission has yet to harmonise this standard and therefore CE marking does not currently apply. • All of Wrekin’s castings conform to this standard. • Wrekin was the first company globally to have its ironwork range Kitemarked to this standard.


Fully complies with BS EN 124:2015 and has patented features that make it superior to competing products.


Gully Gratings

D400 Straight Bar Gully Grate - Group 3 The frame has been designed to suit all existing gully pot styles and will sit over a typical 450mm Ø circular or horseshoe chamber. An additional feature of the frame’s design is the anti-debris feature to stop the backfill material entering the chamber.


B125 covers

Wrekin’s range of single-seal BS EN 124:2015 B125 Group 2 Manhole Covers have been designed to combine high strength and light weight and include additional features such as a single seal labyrinth and safety enhancements.



ClickLift™ is a low cost accessory for TriStar™ and Highway® manhole cover and gully grating ranges, allowing groundworkers to raise ironwork from base wearing course to final wearing course level in matter of minutes. ClickLift™ is available in two lifting depths of 30mm and 40mm and securely clicks/locks into the standard frames of both our TriStar™ and Highway® products. ClickLift™ is part of our range of patented cost saving manhole cover accessories designed for the groundworker, which include Defender™ and CoverSafe™.