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Pipex px® have unique manufacturing capabilities.

Please contact us to find out how we can help with your project requirements.

+44 (0) 1752 581 200



Product Overview

Pipex px® range of thermoplastic Underslab Manholes are available in rectangular or circular with branch inlets configured to suit project specific drainage layouts.

The manholes are factory manufactured to BSEN13598-2 as stated in Sewers for Adoption 7th Edition, and every manhole is factory tested prior to site delivery.

Various options are available such as factory installed shuttering, internal bolted hatch box and top formwork to interface with the structural floor slab.

Materials of Manufacture

  • Polypropylene (PPH)
  • High Density Polyethylene (HDPE)



  • Smooth Internal bores prevent the build-up of FOG’s (fats, oils and greases), suitable for pressure jetting and sealed against odours
  • BBA approved to 3 meter diameter x 6 meter depth, BS EN 13598, as standard
  • Bespoke and standard sizes factory manufactured offsite, for fast track installation
  • 60+ years design life
  • Adjustable turret and watertight seal available for perfect interface with structural slabs
  • Highly corrosion resistant
  • Suitable for mass poured concrete slabs and suspended drainage system
  • Lightweight properties enabling fast track site installation
  • Thermoplastic benching and channels improve hydraulic performance ref: BSEN752 NA.

Our manholes can be supplied complete with rebar reinforcement to interface with concrete raft slab designs.

Top Formworks are provided to interface project specific manhole covers and frames.




Watch our video now to see how our underslab manholes could enhance your projects.

Contact our technical expert for more information: