With a flat level design long horizontal runs above overhead ceilings are pos sible as shown in illustration 4.
Siphonic roof drainage system.
Siphonic roof drainage is not so much a system in terms of a pre engineered product or package.
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.
Wh 301 401 501 601 siphonic overflow drain.
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.
Unlike traditional roof drainage systems a siphonic system is designed to operate with the piping completely charged with water during a rainstorm.
It is instead a technique of no pitch pipe design used to achieve desired flow from roof drains to point s of discharge.
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.
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.
Wh 300 400 500 600 siphonic primary roof drain.
Wade siphonic drainage design request.
Wh 300 pg wh 400 pg siphonic deck drain.