Surface And Foul


Specialist surface water drainage:


Independent Civils Solutions are specialists in surface water drainage, stocking a full drainage system encompassing all elements including BBA approved pipework, a full range of fittings and inspection chambers.


We can also offer fully adoptable large diameter drainage systems, flow controls, penstocks & headwalls.


Speak to one of our knowledgeable members of staff who can tailor a quote to your site requirements

  • Full Stock
  • Full Support
  • Sustainable
  • Innovative
  • Socketed Underground Pipe combines reliable connections with the latest in blown end technology.
  • A plastic circular insert holds the rubber seal in place during transit and also provides an ideal connection for jointing.
  • All underground fittings utilise seal and snap technology, avoiding sharp edges and allowing for an easy fit connection. The seal is double ribbed, whilst the sockets incorporate a recess that provides space for the rubber seal to locate as the pipe is inserted.
  • Effective means of waste water drainage and foul discharge from above ground drainage
  • Strong and durable, products are also lightweight, aesthetic and easy to install
  • Suitable for extreme environments including temperature and waste discharge
  • Push-Fit joint achieved using a ‘cap and seal’ system
  • A range of fittings available, suiting most installations and can be integrated with Kalsi above and below ground drainage products
  • Available in Terracotta Brown
  • All ranges are compliant with British Standards

Step by Step Installation Guide - UNDERGROUND DRAINAGE


Step 1

  • According to British Standards and Building Regulations, dig your trench.
  • We recommend to reference to the current regulations document, BS EN: 752: 1997 and BS EN: 1610: 1998.
  • Where drainage appears internally, BS EN 12056 should also be consulted.

Step 2

  • Drop pea shingles into the trench to create the pipe bed, making sure the pipe is well supported.

Step 3

  • Decided where the main fittings will be placed. Make sure the inspection chamber is positioned in a way, where the water flow is maintained through the primary channel to reduce the possibility of blockages.

Step 4

  • Place a solid support under the long radius rest bend when connecting to a vertical soil and ventilation pipe.

Step 5

  • The length of the pipe connecting the rest bend to the first inspection chamber should be measured and cut.
  • When cutting pipes all ends should be chamfered and free of residual material, swarf, grit, and dirt.

Step 6

  • Make sure all cut lengths of pipe are chamfered as 45° angle to ensure a smooth insertion into the fittings.

Step 7

  • Use lubricant on the seals to ensure smooth easy insertion without damage to the seals.
  • Follow the same method for the remaining fittings.

Step 8

  • According to the system, you can add traps and bottle gullies, where applicable.
  • In our range we also offer a telescopic bottle gully to allow for different floor levels.

Step 9

  • Use soil pipes to connect them straight into the long radius bend.
  • The diameter of our 110mm PVC-U above and below ground drainage systems are the same and a direct connection can be achieved.

Step 10

  • Rainwater adaptors are used to connect all downpipes, where applicable.
  • Connections to other materials such as cast iron, supersleeve and hepsleeve is achieved by using a range of our rigid and flexible adapters and couplings.

Step 11

  • If you wish to change the direction of your underground system, add another inspection chamber.
  • To complete the installation, add raising piece, according to the depth.

Step 12

  • Large inspection chamber height can be up to a maximum of 1.2m, with the standard 470mm plastic cover and frame.
  • Small inspection chamber height can be up to maximum of 600mm, with a standard plastic cover and frame.

Step 13

  • Once all pipework has been tested then backfill with pea gravel to the crown of the pipework and backfill with the dug-out soil.


  • Access is integral to the efficiency of a drainage installation, for testing, inspection or the removal of blockages and debris. 
  • Rodding points are more commonly used in storm water drainage systems, where the rodding point is located at the head of the drain run connection to a chamber, being no further than 22m away from the chamber.
  • The rodding point should be enclosed in a concrete surround to provide support and ensure that it does not become mislaid at ground level.