Siphonic Roof Rainwater Drainage System

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.

Siphonic roof rainwater drainage system. 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. 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. Unlike traditional roof drainage which is designed to flow part full a siphonic system operates at full capacity when water is sucked or siphoned from the roof down into the drain at high velocity. Higher flow rates increases efficiency.

Unlike traditional roof drainage systems a siphonic system is designed to operate with the piping completely charged with water during a rainstorm. We are a leader in siphonic rainwater management with a design base of more than 35 000 systems worldwide. Siphonics roofing in principle siphonic drainage is a very simple process. Siphonic drainage was first introduced in the 1960 s in scandinavia and since then has been used widely across europe including the uk in the far east australasia south africa and the usa.

The lack of air and the downward pull of the water creates a vacuum making the drainage process fast and efficent. Air baffle creates siphonic drainage action producing a more efficient drainage than traditional gutter drains. The advantages of a wavin quickstream siphonic roof drainage system. When the rainfall is heavy enough the gullies create reduced pressure in the pipe system.

We provide design jas siphonic outlets hdpe piping systems supervision and installation services that can support our client needs whilst creating specific benefits and integration for your building project. A siphonic roof drainage system however is said to prime during storm events and operate filled with water. For use in engineered siphonic roof drain age systems for gutters parapets small balconies sills cornices marquees and other small overhanging areas where drainage of rainwater is required. Pipes run level and full without air.

Many large industrial commercial and retail buildings are now fitted with siphonic drainage which has clear advantages over gravity drainage. Jas siphonic is a specialist supplier of siphonic roof drainage systems. 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 original full bore flow roof rainwater drainage system.