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WISY Vortex Fine Filter WFF100

The WISY WFF100 Vortex Filter is designed to separate solids from water and can be used for buildings with 2,150 SF of roof area.  A single unit can filter precipitation off of up to 2,150 sq. ft. of roof area to be reused for site irrigation, toilet, and urinal flushing, janitorial use, laundries, fire protection, evaporative cooling tower make-up, process water, or other non-potable uses. The filter is typically installed in-line with the piping system to direct debris to the stormwater system and divert up to 95% of clean rainwater to a rainwater storage tank. Multiple WFF100 units can be used to cover larger roof areas greater than 2,150 sq. ft.  RMS does not recommend the WFF100 to be used when collecting from green-roofs.  

The inlet and debris outlet elevation height difference of the WFF100 is 11”, the inlet and clean water outlet elevation difference is 8.35”. 

Design Principle

The harvested rainwater flows out of the horizontal inlet pipe into the WFF100 and is drawn in a circular (vortex) motion from inflow level down to the filter insert.  By exploiting water’s natural adhesive forces, the harvested rainwater is drawn through the vertical fine filter and passes through the clean water outlet into the storage tank.  The filtered dirt particles are then diverted to the storm drain.  

The filter insert cannot reach its maximum efficiency until the filter mesh has become completely saturated with water.  This process can take up to 2 minutes if the filter insert was initially completely dry.  During this period, the initial dirt particles from the roof are flushed directly to the storm drain.  This is why the vortex filter can function as a “first flush” rainwater pre-filter and thus meets the requirements defined by ARCSA/ASPE/ANSI Standard 63 for Rainwater Catchment Systems.  

Technical Specifications

Collection Area: 2,150 ft.

Filtering Efficiency: Over 90%

Inlet and Debris Outlet elevation difference: 11 in

Inlet and Clean Water Outlet elevation difference: 8.35 in

Housing components, cover, and extension tube material: Polypropylene (PP)

Sealing rings: EPDM

Filter insert and mesh, lifting handle material: Stainless-steel 1.4301

Filter mesh: 280 microns (standard)

Rainwater inlet (collar): 4 in

Clean water outlet: 4 in

Debris outlet: 4 in

Dry Weight: with extension tube 32 lbs.; without extension tube 21 lbs.

WFF100 with Extension Tube and 280-micron filter insert: WF 2011

WFF100 without Extension Tube and 280-micron filter insert: WF 2002

Each WFF100 Vortex Filter includes:

  • Polypropylene Filter Housing 
  • 280 Micron Stainless Steel Filter Insert 
  • Lifting Handle (11.8”) 
  • Housing cover
  • Rotating upper and bottom half of housing for custom installation

Spare Parts:

  • 280 Micron Stainless Steel Filter Insert - WE 0305
  • 280 Micron Filter Insert coated with Titanium Nitride (for high levels of abrasive stress) - WE 0402
  • 440 Micron Stainless Steel Filter Insert - WE 0306
  • 440 Micron Filter Insert coated with Titanium Nitride (for high levels of abrasive stress) – WE 0403
  • Housing Cover Lid - WN 1002
  • Final Ring (to support cover) – ZW 1000
  • Lifting Handle (standard) 11.8” - WA 0301

Accessories for WFF100:

  • Extension tube (20” increments) - WV 1010
  • Lifting Handles:
    • 24 in (2 ft.) - WA 0302
    • 39 in (3.3 ft.) - WA 0303
  • Blind Insert - BE 0305
  • Sieve Basket (aka soakaway strainer) - VS 0304
  • Cleaning spray nozzle, pump without timer - SC 1000
  • Stainless Steel Wall-Mount Bracket – WH 0303
  • Stainless Steel Tank Wall Mounting Bracket – WH 0400

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