Dallmer introduces ‘red zone’ roof drain

Dok_671363D03Dallmer has introduced its new, high capacity ‘Red’ Drain featuring a unique red colour that identifies it as a separate system from the conventional flat roof drainage and is intended to provide overflow when the main outlets are being overwhelmed.

The versatile design can be connected to chutes or to pipework in gravity or siphonic systems, which clears excess storm-water quickly before it can find vulnerable joints or exert excess structural loads.

‘Red’ Drain variants can be installed as part of a new roof or retrofitted into an existing one and are adjustable to suit different insulation thicknesses and waterproofing systems including Bitumen felt, single ply PVC, TPO, EPDM as well as liquid-applied membranes.

The company says the ‘Red’ Drain will either be situated on the flat roof itself or within a box gutter where it can be adjusted to work when the standing water has reached an excess depth of typically 30mm up to a maximum of 100mm.

Furthermore, because of the ‘Red’ Drain’s design, it compensates for the tendency of secondary drainage systems to silt up through their occasional usage. This height adjustability can be of particular importance if the primary drainage system is siphonic as setting the overflow too low could rob the siphonic system of water, admitting air and rendering it ineffective.

A spokesperson for Dallmer commented: “All too frequently, we see North America and Europe experience new record rainfall, which has led to water ponding on flat roofs which this can cause serious damage, especially to lightweight steel structures. Installing our ‘Red’ Drains as overflows for a flat roof drainage system, can guard against these extreme events, protecting both property and the occupants.”

“Whatever the type of roof make-up or pipework system used, there is a ‘Red’ Drain suitable for the job. They offer high flow rates as well as straightforward installation and the building remains properly protected.”


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