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Caroflow Roof Drainage Products 

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Balcony Outlets Specifications 

Caroflow Balcony Outlets are designed to allow the unit to be installed against a wall/upstand and the grating, which can be cut on site or prior to delivery, will allow various sizes of pipework to drain into the outlet from upper levels to provide a continuous drainage line from top to bottom storey. 
Available in either LM6 Aluminium Silicon casting alloy to BS EN 1706:2010 for most roof finishes or in leaded gunmetal to BS EN 1982:2008 for use with lead or copper-clad roofs or for connection to copper pipework. 
 
Our Balcony outlets are available in three sizes; 50mm, 75mm and 100mm. 
 
The codes and dimensions of each of our Balcony Outlets is as follows; 
 
50mm Balcony Outlet 
Code 
– 50/BO 
 
A = 230, B = 190, C = 50, D = 265, E = 206, F = 85, G = 130, H = 60, J = 142 
 
75mm Balcony Outlet 
Code 
– 75/BO 
 
A = 230, B = 190, C = 50, D = 265, E = 206, F = 85, G = 130, H = 83, J = 142 
 
100mm Balcony Outlet 
Code 
– 100/BO 
 
A = 230, B = 190, C = 50, D = 265, E = 206, F = 85, G = 130, H = 110, J = 142 
 
The 75mm and 100mm versions of the Balcony Outlet as also available with Extended Spigot if required. 
 
The Codes and Dimensions for the Balcony Outlet with Extended Spigot are as follows: 
 
75mm Balcony Outlet with Extended Spigot 
Code 
– 75/BO/EXT 
 
A = 230, B = 190, C = 50, D = 265, E = 206, F = 85, G = 250, H = 83, J = 142 
 
Caroflow Balcony outlets are suitable for connection to, PVC (50/BO will not connect directly), Aluminium, Cast Iron and Copper (Gunmetal only). 

Drainage Areas & Flow Rates for Balcony 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. 

Accessories 

Example Specification 

100mm nominal bore CAROFLOW Balcony Spigot aluminium rainwater outlet with a flat grating Code 100/BO (100/BO/100H to indicate that the grating must be cut to receive 100mm pipe) 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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