Two systems: Akasison L and XL
Freedom of design
As no two buildings are alike creating a successful building is now more of an accomplish- ment than ever. Whether the building is a large storage facility or a neighbourhood supermarket, Akasison offers you the right siphonic roof drainage system for every building.
Not only the size of the roof surface influences the choice of system, also the function of the building and local installation preferences will direct the outcome. Akasison is available in two systems:
- Ideal for smaller roof surfaces
- High performance thermoplastic (HPTP)
- Pipe diameters 40-200 mm
- Green coloured pipe & fittings
- Solvent cement jointing
- Free moving pipe system
- Flexible roof outlet connection
XL
- Ideal for larger roof surfaces
- High density polyethylene (HDPE)
- Pipe diameters 40-315 mm
- Black coloured pipe & fittings
- Electrofusion jointing
- Rigid bracket installation
- Fixed roof outlet connection
Applied technology
The Akasison siphonic roof drainage system L and XL combines the following technologies:
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design service -
high accuracy and flexibility

Cost-effective siphonic roof drainage systems are engineered as a function within the layout of the building, type of roof, rainwater intensities, etc. Our Akacad design and calculation service enables you to create a well-functioning drainage system within the constraints of these parameters.
Our Technical Support department is specialized to fully assist you. Our Akacad design software will help in this process. This software enables us to optimise technical analysis accurately and
produce a hydraulic calculation, parts list and isometric drawing
of the pipe work.
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roof outlets -
reducing complexity

For every level of rain intensity, type of roof construction or roofing membrane, you can use the Akasison roof outlet 75. At the heart of your siphonic system you will have a roof outlet that meets modern technical, logistic and installation requirements.
The roof outlet has a HPTP or PE pipe connector for both Akasison L and XL. Further options for a gully, emergency overflow, vapour barrier connection, fire protection and parking deck complete the range.Please use the roof outlet selector to choose a dedicated Akasison roof outlet.
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fixing system -
finish first
The Akasison fixing system offers a single solution for all type of roof constructions with many smart features that enable a secure and convenient pipe installation. The brackets have a 215° hook part which support the pipe, freeing both hands for further installation.
The versatile brackets can be installed in both a rail system as well as a system suspended from threaded rod. One fixing system for both Akasison L and XL.






The Akasison roof outlets are at the heart of the siphonic roof drainage system. They respond to the negative pressure conditions in the system by streamlining the fluid flow and prevent the entry of air.
