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Below Ground Drainage Companies in the UK

  • SDS Ltd are a the leading UK provider of surface water management offering a complete solution from design, consultancy and manufacturing, through...

  • Flexseal design and manufacture a comprehensive range of fully approved low and non pressure flexible couplings suitable for sewerage, drainage, plumbing...

  • Althon Ltd are specialists in the design, manufacture and supply of surface water drainage and sustainable urban drainage systems (SUDS) for the...

  • Stanton Bonna drainage products includes Circular and elliptical concrete pipes and used for sewerage and drainage systems, attenuation tanks and sea...

  • CPM is a market leader in the supply, manufacture and design of concrete drainage products including flexible, Ogee & perforated pipes, sealed manhole...

  • Grassform is a leading ground protection, land drainage and sports ground company with a large range of specialist plant and agricultural machinery...

  • ACO Building Drainage specialises in corrosion resistant internal & external drainage systems & building products. Our product ranges include anti-flood...

  • Source One Environmental provides products and systems to minimize the environmental impact within sewerage & drainage applications. The wide range of...

  • Tubosider is the market leader in the manufacture and supply of corrugated steel pipe and related products used in stormwater management tanks, soakaways,...

  • Saint-Gobain PAM UK is the primary supplier of ductile iron and cast iron products to the UK's key utilities, telecoms, highways, civil engineering,...

  • Marley Plumbing & Drainage
    Manufacturers and suppliers of above and below ground drainage, hot and cold water supply and ventilation product ranges and offering storm water management and rainwater harvesting systems.
  • John Davidson (Pipes) Limited
    Specialist in civil and drainage products with distribution centres throughout mainland UK.

Where to buy below ground drainage

  • SDS Ltd - Clearwater House, Castlemills, Biddisham, Somerset, BS26 2RH, 01934 751 303
  • Flexseal - Endeavour Works, Newlands Way, Valley Park, Wombwell, Barnsley, South Yorkshire, S73 0UW, 01226 340 888
  • Althon Ltd - Vulcan Road South, Norwich, Norfolk, NR6 6AF, 01603 488700
  • Stanton Bonna - Littlewell Lane, Stanton by Dale, Ilkeston, Derbyshire, DE7 4QW, 0115 944 1448
  • CPM Group Ltd - Mells Road, Mells, Near Frome, Somerset, BA11 3PD, 01179 814500
  • Grassform Group - Little Woodbarns Farm Yard, Green Street, Fryerning, Ingatestone, Essex, CM4 0NT, 01277 353686
  • ACO Building Drainage - ACO Business Centre, Caxton Road, Bedford, Bedfordshire, MK41 0LF, 01462 810400
  • Source One Environmental - Endeavour Works, Newlands Way, Valley Park, Wombwell, Barnsley, South Yorkshire, S73 0UW, 01226 397015
  • Tubosider UK Ltd - 10 Sutton Fold Industrial Estate, Lancots Lane, Sutton, St Helens, Merseyside, WA9 3GL, 01744 452900
  • Saint-Gobain PAM UK - Lows Lane, Stanton-by-Dale, Ilkeston, Derbyshire, DE7 4QU, 0115 930 5000

Should the soil and vent stack to a two storey dwelling connect to the head of the drain within a manhole on level invert or is it allowed to be connected to a branch within the chamber.

I await your reply,



If I understand your question correctly, you are referring to a GRP or brick manhole with several branch connections within it...should you use a spare one for sole use as a vent or can you use a branch which is also being used for waste water from wcs, bath and basin etc.?

Assuming the foregoing is right, the answer to your question is either way is fine provided the Inspection Chamber is at the head of the drain run.

If in doubt refer to Building Regulations AD; H or your local Building Inspector.


Leigh Tugwood - Architect -

Is there any way of overcoming blistering in below ground foul water pipes other than removing and replacing?

There are a number of no dig solutions on the market. The product development team at Fernco Environmental featured above have been very helpful with my investigations on your behalf. Fernco can provide a localised repair system called 'pipe doctor' which can be installed in 550mm - 1200mm lengths and is suitable for pipes with diameters of 75mm - 1200mm.

If the pipe has been badly deformed (as is often the case with pitch fibre pipes) depending on the severity, it may be possible to carry out reforming and lining. and both offer further help and advice with this problem.

Kind regards

Debbie Prince - The Construction Centre

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