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.

Siphonic roof drainage system.

Siphonic drainage systems operate with specially designed flat roof drains which unlike gravity drainage systems are configured to work with completely full pipes degree of fill h d 1 0. Unlike traditional roof drainage systems a siphonic system is designed to operate with the piping completely charged with water during a rainstorm. 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. 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.

The water is sucked or siphoned from the roof down into the drain at high velocity. Siphonic roof drainage is not so much a system in terms of a pre engineered product or package. It is instead a technique of no pitch pipe design used to achieve desired flow from roof drains to point s of discharge. Wh 300 400 500 600 siphonic primary roof drain.

Wh 301 401 501 601 siphonic overflow drain. With a flat level design long horizontal runs above overhead ceilings are pos sible as shown in illustration 4. Despite what its name may suggest the process of syphonic drainage does not actually involve the syphoning of water at all. 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.