Osma Science of Drainage

Osma Below Ground Drainage

industry-leading pipes and fittings designed to last longer and be easier to install.

The Science of Drainage Overview


Drainage solutions including the Osma Bottle Gully

Its advanced design includes a rotating body, which means you can position the gully at an angle that suits the drainage system.

OsmaDrain range

Osma UltraRib

Strength in every rib!

tick Unique ribbed design for exceptional axial rigidity and radial strength.
tick The UK’s only single walled ribbed system.
tick Tried, tested and trusted for over 30 years.

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Designed to exceed

Osma UltraRib has been designed and manufactured to exceed all required industry standards for PVC-U systems, OSMA UltraRib has provided foul and surface water solutions that have been relied upon for over 30 years.

Osma UltraRib range

Pipe Deformation Tool

Use our handy on-line tool to instantly calculate the deformation rate for Osma UltraRib pipe.

Use the tool

Osma Inspection Chambers

Inspection chambers bases

The widest range of bases available for adoptable and non adoptable situations

Osma Inspection Chambers range

Inspection Chamber Selector

Take the hassle out of selecting the right Inspection Chamber for your next project

Use the tool

Osma Domestic Channel Drainage

Rain and threshold channels

Lightweight and robust drainage soultions for domestic situations - plastic and galvanised grating options

Osma Channel Drain range


OsmaDrain - Product and Installation Manual


Osma UltraRib - Product and Installation Manual


Osma Inspection Chambers - Product and Installation Manual


Osma Domestic Channel Drainage - Product and Installation Manual


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