Siphonic Roof Drain System
This air baffle is engineered and tested to prevent air from entering the piping system at peak flows.
Siphonic roof drain system. A siphonic roof drain looks much like a traditional roof 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 distinguishing feature of a siphonic roof drain is the air baffle. By minimising the intake of air into the system the water creates a siphoning effect maximising the suction of the water into the outlet.
Unlike traditional roof drainage systems a siphonic system is designed to operate with the piping completely charged with water during a rainstorm. When sizing and installing a siphonic system there are a series of guidelines to be followed. Wade siphonic drainage design request. Many large industrial commercial and retail buildings are now fitted with siphonic drainage which has clear advantages over gravity drainage.
A syphonic drainage system is not only cheaper to construct than a typical roof drainage system especially when a large industrial roof has to be covered but the system s design means there is no need for the pipe pitch or gradients found in typical roof drain piping. 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. Uv system designs and supplies its line of top performing siphonic roof drains to projects throughout the united states canada and mexico. 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.
The innovative component of the siphonic roof drainage system is the specially designed roof outlet which controls the pattern of discharge preventing air from entering the pipework. Wh 300 400 500 600 siphonic primary roof drain. The water is sucked or siphoned from the roof down into the drain at high velocity. Siphonic drainage can be used on membrane concrete and gravel roofs as well as on green roofs with extensive planting.