Siphonic Roof Drainage System Design

With a flat level design long horizontal runs above overhead ceilings are pos sible as shown in illustration 4.

Siphonic roof drainage system design.

A point of discharge. Siphonic roof drainage systems at low rainfall intensities and flow rates a siphonic system operates similarly to a conventional system with water flowing through the pipe network at atmospheric pressure. A siphonic roof drainage system however is said to prime during storm events and operate filled with water. A vertical drop from the roof level to some lower level and 3.

The siphonic roof drainage system is based on the ingenious gravity induced vacuum principle allowing a quick and efficient way of draining roofs comprising various shapes and gradients. Syphonic systems are the most efficient method of doing this and whilst they can be applied to most industrial roofing designs you must always ensure that your system is installed by competent syphonic drainage contractors make sure your system runs properly. 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. Comprising high quality stainless steel siphonic roof outlets high density polyethylene hdpe pipes fittings and a professional support package the siphonic roof drainage system allows the complete drainage of a roof without the requirement of a slope in the pipework thus saving valuable space.

Unlike traditional roof drainage systems a siphonic system is designed to operate with the piping completely charged with water during a rainstorm. The siphonic roof drainage system is based on the ingenious gravity induced vacuum principle. Aco siphonic drainage traffic free roof areas which are no larger than 150 m2 such as production buildings hangars or sports stadiums are suitable applications for siphonic drainage. Siphonic roof drainage is not so much a system in terms of a pre engineered product or package.

When the rainfall is heavy enough the gullies create reduced pressure in the pipe system. It is instead a technique of no pitch pipe design used to achieve desired flow from roof drains to point s of discharge. An overview of siphonic roof drainage systems all roof drainage systems have three main elements in common beyond the fact that they all use pipes to convey the water. One or more roof drains 2.

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