WFF100 WISY Vortex Rainwater Filter

The WISY WFF 100 is engineered for small to mid-size roofs up to 2,100 sq ft, with the option to combine multiple units for more coverage. For larger projects, the WFF 150 handles up to 5,500 sq ft. Inside the filter, a spinning vortex pushes water through 280 micron stainless steel mesh (440 micron available), sending clean water to storage and debris to the drain. Typically installed in-line with your piping, it captures up to 95% of clean rainwater while flushing debris to the drain. 

The WFF 100 is built to last, simple to maintain, and flexible to install. See Specifications for roof compatibility and installation details. Perfect for homes, small businesses, and agricultural buildings. Use the water for gardens, lawn care, toilet flushing, laundry, car washing, and hosing off the deck. Post-tank filtration and purification systems make rainwater safe for whole-home use and livestock. For questions about additional treatment options, including potable use, contact a member of our team.

Have questions about design, application, or installation? Our team knows these systems inside and out. Give us a call today.

Key Specs: 66 GPM max flow | 280 micron filter (440 optional) | 2,100 sq ft roof area per unit | Combine for larger roofs | Extension tube included (adds 22") 

Features and Benefits

Built for Efficient Collection

• Filters over 1 gallon of stormwater per second
• Covers up to 2,100 sq ft roof area per unit
• Full pipe cross-section maintained with no internal bottlenecks
• Multiple units can be combined for larger roofs

Self-Cleaning Vortex Technology

• Spinning water action sweeps debris off filter mesh automatically
• Leaves, moss, and sediment routed to stormwater system
• Oxygen mixed into filtered water for improved storage quality
• Built-in first flush diverts dirtiest initial runoff while filter saturates (up to 2 minutes)
• Meets ARCSA/ASPE/ANSI Standard 63 for Rainwater Catchment Systems

Durable Construction

• Stainless steel filter insert resists corrosion and debris adhesion
• Polypropylene housing withstands soil, moisture, and ground chemicals
• Vehicle rated to 30 metric tons over compacted subsoil or concrete slab
• Stainless steel filter insert and lifting handle included

Low Maintenance

• Inspection recommended only twice per year
• Filter insert is dishwasher-safe
• Can be pressure washed at 20" nozzle distance
• Smooth mesh surface reduces buildup

Flexible Installation

• All three pipe connections rotate 360° independently
• Below-grade or indoor mounting options
• Optional wall brackets for indoor/shaft installation ((WH 0303) flat wall / (WH 0400) curved tank wall)
• Extension tube included; trims to height using built-in saw grooves
• Up to two extension tubes for deeper installations
• End ring allows flush finish with surrounding pavement

Filtration Options

• 280 micron mesh (standard) for fine filtration
• 440 micron mesh (WE 0301)for coarser applications
• Blind insert (BE 0301) available for tank maintenance bypass

Specifications

Performance

• Maximum flow rate: 66 GPM
• Maximum connectable roof area: 2,100 sq ft
• Filter mesh options: 280 micron (fine) or 440 micron (coarse)
• Vehicle load rating: up to 30 metric tons (requires compacted subsoil or concrete slab)

Connections

• Rainwater inlet: 4" with socket and gasket, 360° rotatable
• Drain/debris outlet: 4", 360° rotatable
• Filtered water outlet to storage tank: 4", 360° rotatable
• Minimum settling length before rainwater inlet: 19.6"
• Drain tube diameter must be equal to or larger than the inlet tube diameter

Elevation Requirements

• Rainwater inlet to drain connection (vertical distance): 10.6"
• Rainwater inlet to filtered water outlet (vertical distance): 8.3"

Dimensions (housing only, without extension tube)

• Housing diameter: 12.4"
• Overall height: 19"

Extension Tube

• Bridges filter housing to ground-level cover for easy access
• Adds 22" of height, trimmable to fit installation depth using built-in saw grooves
• Up to two tubes can be stacked for deeper installations
• Secured with included stainless steel screws

Materials

• Filter insert: stainless steel
• Housing, cover, and extension tube: polypropylene
• Lifting handle: stainless steel (11.8" standard length included; 24" and 39" lengths available)
• Connection hardware: stainless steel screws (included)

Operating Conditions

• Suitable for outdoor below-grade or indoor installation
• Not a sealed/closed system; must not remain flooded for extended periods
• Indoor installation requires a floor drain in the installation room
• Indoor max inflow must not exceed 66 GPM
• In loamy soil, provide drainage beneath the filter or seal housing joints externally before installation
• For installations too deep or under excessive load, a concrete shaft is required

Compatible Roof Surfaces

• Slate, clay tile, concrete tile, sheet metal, foil/membrane roofing
• Asphalt shingles: suitable for non-potable (flushing, laundry); generally not recommended for potable, testing untreated runoff is essential if pursuing
• Green roofs: not recommended (retention and discoloration concerns)
• Bitumen roofs: not recommended (possible discoloration from tar and carbon leaching)
• Asbestos-cement roofs: not compatible (must be renovated before connection)

Parts & Accessories

Replacement Filter Inserts:

• 280 Micron Stainless Steel Filter Insert (WE 0305)
• 440 Micron Stainless Steel Filter Insert (WE 0306)
  

Replacement Parts: Call to Order

• Housing Cover Lid (WN 1002)
• Final Ring to support cover (ZW 1000)
• Lifting Handle 11.8" standard (WA 0301)

Installation Accessories:

• Extension Tube, 20" increments (WV 1010)
• Lifting Handle 24" (WA 0302)
• Lifting Handle 39" (WA 0303)
• Stainless Steel Wall-Mount Bracket for flat walls (WH 0303)
• Stainless Steel Wall-Mount Bracket for curved tank walls (WH 0400)

Optional Add-Ons:

• Blind Insert for tank maintenance bypass (BE 0305)
• Soak-Away Strainer for infiltration systems (VS 0304)
  

Downloads

Product and Installation Guide

Videos

Take a look at how the WISY Vortex Filters maintain a high efficiency while eliminating most debris that would otherwise go to the tank.