Siphonic Roof Drainage System

The water is sucked or siphoned from the roof down into the drain at high velocity.

Siphonic roof drainage system.

Wh 300 pg wh 400 pg siphonic deck drain. 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. Despite what its name may suggest the process of syphonic drainage does not actually involve the syphoning of water at all.

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. Wade siphonic drainage design request. 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. 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.

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. 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. 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.