(1) Does a Siphonic System require any special piping system, and if so, will it be more expensive?
There is no restriction in the type of pipe material that can be used in siphonic systems. The following types have all been used; UPVC, HDPE, cast iron, stainless steel. A combination of different pipe materials in the same system is also quite common. Well-engineered siphonic systems use much smaller pipe diameters than conventional RWDP systems and therefore produce more economical solutions. More information can be found in our system brochure.
(2) Can the Siphonic System be installed by any contractor?
The siphonic system must be installed in accordance to our specific requirements so as not to affect its performance. It is recommended that this be done by trained installers.
(3) Is the Siphonic System only-cost efficient for high-rise buildings?
No. While the cost efficiency in high-rise building is more apparent due to the savings in the greater quantity of pipes, the cost efficiency in low-rise and smaller roof areas will come from indirect saving made in associated works such as external drainage. Our case studies will shed further light on this question.
(4) What is the minimum height requirement for a building to use a Siphonic System?
There is no minimum height requirement for a siphonic system. Proper engineering calculation will ensure that the system can function at the height it is designed for.
(5) What are the gradient requirements for the horizontal pipes in the System? Is there a limitation to the length of horizontal pipe to be used in the System?
All horizontal pipe works in the system do not require a gradient. Siphonic systems can run at zero gradients and far longer than any conventional system.
(6) What happens when the rainfall intensity is higher than that designed for?
Rainfall intensities are based on statistical information, and the design criteria must be carefully chosen. As with conventional systems, the amount of rain drained will be what is designed for. It is best to seek specialist advice if there is any concern.
(7) Is it better to design buildings with a high design rainfall intensity to avoid the potential from the normal design rainfall intensity being exceeded?
Over-designing rainwater systems is not economic. Any excess rainfall above the design rainfall intensity will not affect the siphonic system but may instead affect the building. The building designer must consider the balance between risk and cost.
(8) What is involved in the engineering of a siphonic system?
Properly designed siphonic systems should be carried out by professionals who will provide engineering calculation and shop drawings. In some countries a local professional engineer may need to endorse the design. The system should carry a form of technical compliance such as the British Board of Agreement.
(9) What kind of Warranties are provided for Siphonic System?
Warranties that are be provided for the siphonic system can be limited to the design element or extended to include the installation. Warranties vary greatly in description, and depending on a specific project’s format, the cost of such Warranty will be determined. Contact us for details on your project.