Rainfall Intensity – Why is it important?

Rainfall intensities are based on statistical information, which is a key parameter in design criteria and must be carefully chosen. Over or under selection of rainfall intensity rate can impact system costs and the risk of water overflow into the building. The designer of the building should consider what priority requirements exist for the project. It is best to seek specialist advice/data on rainfall intensity for each area in which the building is located.

Are there any valves, utility connections or mechanical/electrical controls to make the siphon work?

Siphonic action it achieve by hydraulic engineering calculation utilizing energy from the building height. Proper pipe sizing design help balance the entire hydraulic action. JAS Outlet creates vortex-free rainwater inflow. All these factors help create an optimal siphonic system.

Siphon Break- what is it and where should it be?

Siphon break is a transition point from negative pressure to atmospheric pressure which is done by increasing the diameter of the pipe. High velocities are needed in siphonic systems to create suction / negative pressure in the system. Accordingly, the velocity at the end of siphonic system (at siphon break point) shall not exceed 3m/s for the transection to gravity flow. The siphon break point must be located by a siphonic specialist.

Outlet and Pipe – How to protect them during construction?

A temporary drainage system may be required, but the contractor needs to ensure that significant construction debris does not block the piping system. For the concrete slab, cement can get into the pipe, which may cause a serious blockage problem. Temporary blocking protection should be installed to cover siphonic outlets before pouring concrete.