WE ARE A SPECIALIST SUPPLIER
OF SIPHONIC ROOF DRAINAGE SYSTEM
What is JAS Siphonic?

JAS Siphonic is a rainwater drainage system that utilizes siphonic principles and fluid mechanics. To enable a continuous full-blow flow of drainage, the Siphonic system requires smaller pipes than the conventional drainage system, which can drain 10 times faster and also, is flexible in design. The pipework is calculated to maintain velocity and negative pressure to ensure the efficiency and safety of the drainage system.
The JAS Siphonic is designed by specialist engineers of the siphonic water management system according to BS EN 12056-3: 2000, BS 8490-2007.
Why JAS Siphonic ?

Flexible pipe routing

Smaller pipes due
to full-bore flow

Less pipes required due
to faster drainage

Less manholes and underground pipework

No slope required for horizontal pipes, providing extra space

Smaller rainwater gutter

HDPE pipes are highly resistant to negative pressure, no risk of pipe damaging from pressure

Reduced project cost up
to 55% – 65%
JAS Siphonic Roof Drainage
We are the leader in innovative technology
and we bring the excellent roof drainage solution to your building.
Reason for choosing JAS Siphonic

Project Owners
- Flexible design according to project owners
- Enhance the project’s aesthetics
- Lower cost on roof drainage system, including site drainage
- Rainwater recyclable
- Improve the efficiency of the project’s roof

Engineers/Architects
- No slope required for horizontal pipes, providing extra space
- Flexible pipe routing according to architects/engineers
- Small pipes designed that can fit into the piping shaft
- Less vertical pipes and manholes

Contractors
- Save the rainwater drainage system and site drainage cost up to 65%
- Lower construction time due to less pipes, less manholes, and less underground pipework
- Fast response with on-site service by our engineer team that specializes in the Siphonic Roof Drainage System with both online and on-site supervision