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Flat roof drainage outlets


Vertical Spigot Outlets

Caroflow Vertical Spigot outlets are available in four sizes; 50mm, 75mm, 100mm and 150mm. Each spigot outlet comes with a body, clamping ring and grating assembly (domical or flat).

CodeM2 Dome grateLtrs/secM2 Flat grateLtrs/sec

Caroflow Balcony Outlet

Available in three spigot sizes; 50mm, 75mm and 100mm. Caroflow balcony spigot 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 give a continuous drainage line from top to bottom storey.

CodeM2 Dome grateLtrs/secM2 Flat grateLtrs/sec

Caroflow Two Way Outlets

Available in 50mm, 75mm, 100mm and 150mm spigot sizes, Caroflow Two-Way Threaded roof outlets are designed for use at the intersection of horizontal and vertical surfaces, i.e. a balcony and parapet wall, and can be used to drain off vertically or horizontally with the aid of the appropriate Caroflow Threaded Adaptor.

TypeCodeM2 Flat grateLtrs/sec
Two-way outlets (horizontal)100/TW1142.38
Two-way outlets (vertical)100/TW3767.83

Caroflow Threaded Adaptor

Caroflow threaded adaptors are manufactured in ABS Plastic and are male taper threaded at one end to BS21 for connection into any Caroflow threaded connection outlet. The other end is then turned and chamfered to BSEN 1566:2004 spigot dimensions to suit nominal bores of 50mm, 75mm, 100mm and 150mm. They are recommended for use where extra length is required, i.e. when the joint between outlet and pipework is likely to be cast within the concrete slab, or where a Two Way outlet is to be connected directly to “O” Ring socketed PVC pipework. The standard length of a Caroflow adaptor is 300mm, but longer lengths can be produced to order.


  • Watertight connection between the water/damp proof membranes and the drainage pipework
  • Removes problem of water penetration at critical junctions
  • Ready made, engineered sump mechanically sealed to membranes
  • Sump securely connects to pipework