Wisy WFF 300 Vortex filter
WISY WFF300 Rainwater filter

This is the largest version of the Wisy Vortex filter, designed specifically for larger buildings. The 300mm diameter inlet pipe makes the filter suitable for roof areas up to 3000m2.

The filter efficiency remains above 90% at flows up to 13 litres/second, and the unit can process a maximum flow rate of 80 l/s. The extremely robust construction means it has a gross vehicle weight rating of 60 tonnes, the only filter unit capable of taking heavy goods traffic without the need for a separate chamber.

The Wisy Vortex WFF300 filter is supplied complete with a heavy gauge stainless steel base-plate to provide stability when installed below ground. This also enables the filter to be used above ground by having the baseplate span brick pillars or similar.

*the 3000m² figure quoted is a nominal figure and should be used as a guide only. It has been calculated based on a rainfall intensity of 5mm per m² in 15 minutes. During such conditions, on a 200m² roof, the filter will function at a hydraulic efficiency of over 95%. This is equivalent to 16.6 litres per second. The actual capacity of a 300mm ID pipe is 80.6 litres/sec with the pipe 0.7 full (according to DIN EN 12056)

Typical applications
  • Industrial buildings
  • Sports arenas
  • Distribution centres
  • Shopping centres
  • Pre-stormwater management filtration
  • Process water filtration
Breakdown of WFF300

Vertical Filtration

Because the filtering surface is vertical, the WISY Vortex is very efficient at cleaning itself; the flow of incoming water simply washes away any debris that accumulates on the surface of the filter element. Most importantly, all the debris is washed away into the storm drain.


Oxygen Enriching

WISY Vortex filters are renowned for their oxygen adding capabilities. when storing rainwater; it is vital that oxygen levels are high to inhibit the growth of undesirable anaerobic organisms and avoid stagnation.

Easy Maintenance

All WISY filter inserts are designed for very low maintenance. It is virtually impossible for debris or dirt to stick to their smooth, stainless-steel surface. As a result, the filter inserts are virtually self-cleaning. When necessary, the filter insert can easily be lifted out of the housing by means of the supplied lifting handle for cleaning, either by hand or using a high-pressure cleaner.


Traffic Loading

The tough polypropylene casing of the Vortex filter allows for installation in traffic areas. the WISY Vortex 300 can be driven on by vehicles of up to 60 Tonnes (GVW)

Vortex Dimensions
Vortex child safety plate

Child Safe

Owing to its large diameter, the vortex fine filter 300 is equipped as standard with a child safety plate. This prevents children or other unauthorized persons from entering the filter and placing themselves in danger.

Drained area: 3000 sq.m

Filter capacity: 80 litres/second

Filter efficience: 90% (at 16L/second)

Housing: Polypropylene

Seals: Rubber

Filter insert & mesh: Stainless-steel

Filter mesh size: 0.38mm

Rainwater inlet: DN300

Clean water outlet (to tank): DN200

Dirty water outlet: DN300

Weight: 95kg

Cover load: 60t GVW

Wisy Vortex