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Caroflow Roof Drainage Products 

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Vertical Threaded Outlets Specifications 

The Caroflow Vertical Threaded outlet is manufactured in LM6 Aluminium Silicon casting alloy to BS EN 1706:2010 for most roof finishes as standard or in leaded gunmetal to BS EN 1982:2008 for use with lead or copper-clad roofs or for connection to copper pipework. They are female parallel threaded to BS21:1985. 
Available in 50mm, 75mm, 100mm and 150mm outlet sizes. 
 
The dimensions for the Vertical Threaded outlet are as follows; 
 
50mm Vertical Threaded Outlet 
Codes 
– 50/VT (with Domical Grate) 
– 50/VT/F (with Flat Grate) 
 
A = 75, B = 50, C = 300, D = 250, E = 70 
 
75mm Vertical Threaded Outlet 
Codes 
– 75/VT (with Domical Grate) 
– 75/VT/F (with Flat Grate) 
 
A = 75, B = 50, C = 300, D = 250, E = 105 
 
100mm Vertical Threaded Outlet 
Codes 
– 100/VT (with Domical Grate) 
– 100/VT/F (with Flat Grate) 
 
A = 90, B = 45, C = 380, D = 305, E = 134 
 
150mm Vertical Threaded Outlet 
Codes 
– 150/VT (with Domical Grate) 
– 150/VT/F (with Flat Grate) 
 
A = 70, B = 45, C = 380, D = 305, E = 185 
 
All Caroflow Vertical Threaded outlets are suitable for connection to, Screw Threaded Steel, Copper (Gunmetal only), PVC, Aluminium and Cast Iron. The PVC, Aluminium and Cast Iron connections are all suitable with the Caroflow Threaded Adaptor. The standard length of our Threaded Adaptor is 300mm, although other lengths can be produced to order. 

Drainage Areas & Flow Rates for Vertical Threaded Outlets 

BS EN 12056-3:2000 (Gravity drainage systems inside buildings – Part 3: Roof drainage, layout and calculation) now specifically limits the drainage capacity that can be used to calculate areas to be drained, so as to prevent siphonic action that may damage internal pipework. 
 
Previous physical testing of all our outlets has shown that the rates and areas (see adjacent table) are lower than results that have been seen from this actual testing. 
 
All rates assume that the outlet grate is free and clear of any debris/blockages 
 
Results are based on a rainfall intensity of 75mm per hour and a 35mm head of water adjacent to the outlet (45mm head for 160mm outlets as per EN 1253-2:2015). 
 
The flow rates shown should be used as a guide only. Each drainage area will have individual features that may influence overall flow characteristics. 

Accessories 

Example Specification 

100mm nominal bore CAROFLOW Vertical Threaded aluminium rainwater outlet with domical grating (Code 100/VT) as manufactured by Caroflow Limited. 

Useful Links 

Technical Support 

To request a quotation, hard copy literature or any further assistance, please call our sales department on (01763) 244446 or you can enquire using our online form
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