Caroflow Roof Drainage Products 

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90-degree Threaded Outlets Specifications 

The Caroflow 90-degree Threaded 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 codes and dimensions for the 90-degree Threaded outlets are as follows; 
50mm 90-degree Threaded Outlet 
– 50/90T (with Domical Grate) 
– 50/90T/F (with Flat Grate) 
A = 130, B = 300, C = 250, D = 150, E = 76 
75mm 90-degree Threaded Outlet 
– 75/90T (with Domical Grate) 
– 75/90T/F (with Flat Grate) 
A = 130, B = 300, C = 250, D = 150, E = 100 
100mm 90-degree Threaded Outlet 
– 100/90T (with Domical Grate) 
– 100/90T/F (with Flat Grate) 
A = 165, B = 380, C = 305, D = 192, E = 125 
150mm 90-degree Threaded Outlet 
– 150/90T (with Domical Grate) 
– 150/90T/F (with Flat Grate) 
A = 223, B = 380, C = 305, D = 150, E = 185 
Caroflow 90-degree 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. 
90-degree Threaded Outlets

Drainage Areas & Flow Rates for 90-degree 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 are assuming 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. 
Flow Rates


Example Specification 

100mm nominal bore CAROFLOW 90-degree Threaded aluminium rainwater outlet with domical grating (Code 100/90T) as manufactured by Caroflow Limited. 

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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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