Siphonic Roof Drain Design

Uv system designs and supplies its line of top performing siphonic roof drains to projects throughout the united states canada and mexico.

Siphonic roof drain design.

Ipc 2012 chapter 11 section 1107 includes siphonic roof drainage. It was designed by an engineer for engineers. 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. With a flat level design long horizontal runs above overhead ceilings are pos sible as shown in illustration 4.

Unlike traditional roof drainage systems a siphonic system is designed to operate with the piping completely charged with water during a rainstorm. To research set standards and disseminate best practice in uk siphonic drainage from design to installation. It is instead a technique of no pitch pipe design used to achieve desired flow from roof drains to point s of discharge. Uv system is the only engineering firm in the united states focused solely on siphonic roof drainage.

A siphonic roof drainage system however is said to prime during storm events and operate filled with water. The siphonic roof drain product test standard is asme a112 6 9 2005 and aspe ansi 45 2013 is the latest plumbing engineering design standard for siphonic roof drainage published and available from aspe. 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 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.

It is suitable for all siphonic system project requirements. Siphonic roof drainage systems must be sized with a hydraulic calculation by a validated program state law requires that this calculation must be performed by a licensed engineer. Siphonitec is an easy to use and is beneficial in roof drain piping system design for large roof applications. For all installations you will need to close any open applications before installation.

Siphonic roof drainage is not so much a system in terms of a pre engineered product or package. 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. Hydromax siphonic roof drainage more efficient many technical benefits and saves money. When the rainfall is heavy enough the gullies create reduced pressure in the pipe system.