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 can be used on membrane concrete and gravel roofs as well as on green roofs with extensive planting. The srda continues to set best practice guidance and standards for the siphonic roof drainage industry standards that are enforced on all its members to ensure that they are delivered to all their clients.
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