Osma Above Ground Drainage

Creating industry-leading above ground drainage solutions that perform better, last longer and are easier to install.

The Science of Drainage Overview


Acoustic Coupler

Soil system offering solvent weld and ring-seal connection methods.

Includes the Acoustic Coupler

OsmaSoil Range

KeyWay system

When installing any drainage system the perfect angle of fall is vital.

So OSMA set to work creating a system that removes the guesswork.

OsmaSoil Range



Push-fit waste and solvent weld waste systems for standard and high temperature usage

OsmaWaste Range


HepvO, the world's first and best waterless trap

OsmaWaste Range


Osma Rainwater

PVC-U gutter profiles for residential and commercial applications

Osma Rainwater Range

StormLine Option

With heavier downfalls than ever before, many conventional guttering systems just can’t cope with the volume of water.

So OSMA developed StormLine.

Osma StromLine Range

Running outlet

The advanced hydrodynamic running outlet has a unique wider aperture, capable of handling up to 30% more rainwater when compared with other outlets of a similar size.


Osma Soil and Waste - Product and Installation Manual


Osma HepvO - Product and Installation Manual


Osma Rainwater - Product and Installation Manual


Find an Osma Stockist

Stockist Locator