Home > Companies > Fixfast Ltd > FarBo® SumpDrain Flat Roof Sump Outlets

Rainwater outlet used for the same application as the ParaDrain but is a much more efficient and powerful product. It creates a suction effect to transfer water from the roof using a sump that the water flows into before entering the spigot; this results in greatly enhanced flow rates and efficiency. Supplied with a FO-MONSOON leaf guard - consult manufacturer for details.

Features and benefits:

  • High quality 650 mm long spigot manufactured from stainless steel.
  • Factory bonded flange to match specific membrane material being used.
  • Membrane attached to the outlet allows for easy installation.
  • Manufactured in accordance with ISO 9001 and ISO 14001 Quality and Management Systems.


Rainwater outlets specifically designed for use in through-wall applications or parapets in new build or refurbishment applications.

Standard product features


  • Material: Stainless steel.
  • Length: 650 mm.

Outlet diameter:

110 mm.

Flow rate:

6.1 L/s.

NBS Specification

NBS Create logo
This product is associated with the following NBS Create clause:
90-10-20/302 Gravity rainwater outlets

NBS Specification

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This product is associated with the following NBS clauses:

Product specification

An important note about specifying



Fixfast Ltd


+44 (0)1732 882387

Product reference

Dark grey PVC membrane attachment, 350 x 350 mm.
Light grey PVC membrane attachment, 350 x 350 mm.
Bituminous membrane attachment, 500 x 500 mm.

Manufacturer details

Merlin House,
Seven Mile Lane,
Borough Green,
Kent, TN15 8QY
Tel +44 (0)1732 882387
Fax +44 (0)1732 885532
NBS Plus