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roof & balcony outlets |
| Flat roof outlets are suitable for use with single skin pvc roofing membranes, multi-layer built up felt roofs and bituminous waterproofing systems. Two types of outlet gratings are available, a domed flat roof grating and a balcony version that provides a flush finish when used with asphalt construction. Each grating is secured by a quarter turn twist and lock action to the outlet flange. This provides easy access for maintenance and removal of any debris that may accumulate around the outlet. Four screw holes are provided in the circular flange to enable a secure fixing to be made to the roof structure. Straight or bent connectors are used to connect to 110mm pvcu pipework which can be reduced to 82mm without any detrimental effect on the outlet performance. Outlets ROF25 and ROB25 are supplied bagged with loose components for on site assembly to suit 68mm circular downpipes. Where this size of downpipe is used internally, the pre-formed socket on the pipe must be removed and the RLR25 socket and RR25 seal used to ensure a watertight joint is achieved. | ||||||||||||||||||||||||||||||||||||
Flow Capacity The flow characteristics of different size flat roof outlets is shown below and is based on a rainfall intensity of 0.021 litres/second per square metre of roof area (75.6mm/hour). BS EN 12056-3:2000 recommends a maximum head over the outlet of up to 35mm for flat roof applications. |
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Hopper heads The flow capacities of different size hopper heads are shown in the table below and are based on the same rainfall intensity used for that of flat roof outlets above.
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Connection to other materials To connect 82mm or 110mm pvcu internal rainwater pipes to non-standard size cast iron or aluminium roof or gutter outlets, the heat shrink joint technique can be employed or alternatively a snap cap, seal and straight connector can be used to accommodate spigot sizes between 83-114mm. |
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for more information visit www.marleyplumbinganddrainage.com |
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| Drakes Plumbing Supplies is an independent plumbers merchants with branches in Kent and Sussex at Tunbridge Wells, Uckfield, East Grinstead, Sevenoaks, Ashford, Gillingham and Sittingbourne. Drakes has been an independent plumbers merchants since 1983. | |
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Drakes Plumbing Supplies. Your independent plumbers merchants. Head Office: Unit 16, Spa Industrial Park, Longfield Road, Tunbridge Wells, Kent. TN2 3EN. |
Tel: 01892 559 915 Fax: 01892 559 916 |
| © Drakes 2004-2008 |
