Siphonic Roof Drainage System

Wh 300 pg wh 400 pg siphonic deck drain.

Siphonic roof drainage system. Instead syphonic drainage technology employs the use of a gravity induced vacuum pump to remove water at high velocity from multiple roof drains at once. This pump requires no external power as it is activated by rainfall filling the drain beyond its anti vortex plate at which point air flow to the pipe is cut off. Despite what its name may suggest the process of syphonic drainage does not actually involve the syphoning of water at all. A siphonic roof drain has a special insert that acts as an air baffle and anti vortex vane such that only water is drawn off of the roof not air.

Wh 301 401 501 601 siphonic overflow drain. By contrast a fully engineered siphonic roof drainage system contains an anti vortex plate that acts as a baffle and prevents air and debris from entering the piping system at full flow allowing the pipes to completely fill up with water. With a flat level design long horizontal runs above overhead ceilings are pos sible as shown in illustration 4. Wh 300 400 500 600 siphonic primary roof drain.

Unlike traditional roof drainage systems a siphonic system is designed to operate with the piping completely charged with water during a rainstorm. Siphonic roof drainage is not so much a system in terms of a pre engineered product or package. This can only be achieved by assuring that no air is sucked in with the rain water and no bubble vortexes formed in the pipe system. The water is sucked or siphoned from the roof down into the drain at high velocity.