Caroflow Roof Drainage Products 

 

Vertical Spigot Outlets Specifications 

The Caroflow Vertical Spigot roof 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. 

Available in 50mm, 75mm, 100mm and 150mm spigot sizes. 

 

The dimensions for the Vertical Spigot outlet are as follows; 

 

50mm Vertical Spigot Outlet 

Codes 

– 50/VS (with Domical Grate) 

– 50/VS/F (with Flat Grate) 

 

A = 92, B = 108, C = 300, D = 250, E = 60 

 

75mm Vertical Spigot Outlet 

Codes 

– 75/VS (with Domical Grate) 

– 75/VS/F (with Flat Grate) 

 

A = 92, B = 108, C = 300, D = 250, E = 83 

 

100mm Vertical Spigot Outlet 

Codes 

– 100/VS (with Domical Grate) 

– 100/VS/F (with Flat Grate) 

 

A = 110, B = 135, C = 380, D = 305, E = 110 

 

150mm Vertical Spigot Outlet 

Codes 

– 150/VS (with Domical Grate) 

– 150/VS/F (with Flat Grate) 

 

A = 85, B = 160, C = 380, D = 305, E = 160 

 

All Caroflow Vertical Spigot outlets are suitable for connection to, PVC (50mm Spigot will not connect directly), Aluminium, Cast Iron and Copper (Gunmetal only). 

Drainage Areas & Flow Rates for Vertical Spigot 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