Fast Flow Pressurised System, the first in the world, is a product of more than seven years of success and refinements in the area of two-phase pressurised flow roof drainage. It combines the high drainage capacity of pressure flow and gravity flow branches into a common rainwater stack. It’s ideal for use in high-rise buildings with balconies and terraces. Fast Flow patented® psVent prevents backflow from ever occurring in branches (typically linked to balconies).
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