Description

Description:

Introducing the powerful WISY WFF300 Vortex Rainwater Filter, your ultimate solution for efficient rainwater management in large-scale applications. Engineered to handle up to 32,290 sq. ft. of roof area, this filter effectively separates solids from water, making it ideal for industrial water treatment or large building projects.

Perfect for both above and below ground collection systems, the WFF300 directs debris away from stormwater while diverting up to 95% of filtered rainwater to storage tanks. Multiple units can be seamlessly integrated to cover even larger roof areas, ensuring maximum water utilization for irrigation, toilet flushing, janitorial needs, and more.

For projects with piping elevation constraints, consider the Short WFF300 variant, which offers a reduced inlet and outlet elevation height difference for enhanced flexibility. Elevate your rainwater harvesting capabilities with the WISY WFF300 Vortex Filter, designed for reliability and sustainability in every drop.

Design:

Specs:

• Collection Area: 32,290 ft.2
• Filtering Efficiency: Up to 222 GPM (14 l/s) (over 90%)
• Standard WFF300 with Composite Lid – WF 3010 (alternate part # RH9521-12PC)
• Standard WFF300 with 60-ton Rated Steel Lid – WF 3001 (alternate part # RH9521-12XH)
• Short WFF300 with Composite Lid – WF 3020
• Short WFF300 with 60-ton Rated Steel Lid – WF 3023
• Inlet and Outlet elevation difference for WFF300: 18.25 in
• Inlet and Outlet elevation difference for Short WFF300: 12.6 in
• Housing components: Polypropylene (PP)
• Sealing rings: EPDM
• Filter insert and mesh, end ring, baseplate, lifting handle material: Stainless-steel 1.4301
• Filter mesh: 380 microns
• Rainwater inlet (collar): 12 in.
• Clean water outlet: 8”
• Debris outlet: 12”
• Dry Weight: with steel cover 238 lbs.;

Each WFF300 Vortex Filter includes:

• Polypropylene Filter Housing with 12” inlet, 12” debris outlet, 8” filtered water outlet
• 380 Micron Stainless Steel Filter Insert
• Baseplate
• Lifting Handle
• Housing cover (polyethylene or steel)
• Rotating upper and bottom half of housing for custom installation

Spare Parts:

• 380 Micron Stainless Steel Filter Insert – WE 0307
• 380 Micron Stainless Steel Filter Insert coated with Titanium Nitride (for high levels of abrasive stress) – WE 0406
• 180 Micron Stainless Steel Filter Insert – WE 0311
• 380 Micron Stainless Steel Filter Insert for the Short WFF300 – WF 0310
• Steel Lid with 60-ton capacity – WF 4001
• Lifting Handle – WA 0305

Accessories for WFF300:

• Extension tube (48” increments) – WV 1030
• Intermediate ring for connection – RS 1020
• Extension Handle

• • 20 in – WA 0307 (alternate part # RH9521EX20)
  • 36 in – WA 0309 (alternate part # RH9521EX36)

• Blind Insert – BE 0306
• Sieve Basket (aka soakaway strainer) – VS 0310
• End ring with child safety device (required for steel lid) – RA 1020
• Cleaning spray nozzle, pump without timer – SC 3000

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Download Manual:

Installation Instructions

Installation Orientation

The WISY WFF300 is designed to operate in a vertical orientation. Proper positioning is essential to achieve the vortex separation effect and maintain the specified filtration efficiency.

• Install the filter with the housing standing perfectly vertical.
• The 12-inch inlet must be aligned with the incoming rainwater pipe.
• The 8-inch filtered water outlet must point toward the rainwater storage tank or cistern.
• The 12-inch debris outlet must discharge to the storm drain, soakaway, or approved drainage system.
• Observe the required elevation difference between the inlet and filtered water outlet:
  • Standard WFF300: 18.25 in (464 mm)
  • Short WFF300: 12.6 in (320 mm)
• Install the unit on a stable, level foundation capable of supporting the operating weight.
• Do not install the filter tilted or horizontally, as this will reduce filtration performance.

Recommended Pipe Connections

For optimum hydraulic performance:

Installation Recommendations

• Maintain gravity flow throughout the system whenever possible.
• Avoid sharp 90° bends immediately before the inlet. Use long-radius bends where practical.
• Ensure all pipework is properly supported to prevent stress on the filter housing.
• Install isolation valves downstream if required for servicing the storage system.
• Do not reduce pipe diameters below the specified connection sizes unless approved by the system designer.
• Where multiple filters are required for larger catchment areas, install the units in parallel to evenly distribute flow.

Maintenance Access Requirements

Allow sufficient clearance around the filter to simplify inspection and servicing.

Recommended minimum clearances:

• Top clearance: Minimum 24 in (600 mm) for removing the filter insert.
• Side clearance: Minimum 12 in (300 mm) around the housing.
• Ensure unobstructed access to:
  • Housing cover
  • Lifting handle
  • Stainless steel filter insert
  • Debris outlet
• Do not permanently concrete over or obstruct the removable cover.
• If installed below grade, use an extension tube where necessary to maintain convenient access from finished grade.

Maintenance and Servicing

Routine maintenance helps maintain filtration efficiency above 90%.

Inspection

• Inspect the filter after the first few significant rainfall events.
• Thereafter inspect:
  • Every 3–6 months under normal operating conditions.
  • Monthly during heavy leaf fall or periods of high organic debris.
  • After major storms or unusually heavy rainfall.

Cleaning

1. Remove the housing cover.
2. Lift out the stainless-steel filter insert using the lifting handle.
3. Rinse the filter mesh with clean water.
4. Remove accumulated debris from the housing.
5. Check the EPDM sealing rings for wear or damage.
6. Reinstall the filter insert and secure the housing cover.

Do not use metal brushes or aggressive chemicals that may damage the stainless-steel mesh or polypropylene housing.

Replacement Components

Replace components when worn or damaged:

• 380 Micron Stainless Steel Filter Insert (WE 0307)
• Titanium Nitride-Coated Filter Insert (WE 0406)
• 180 Micron Filter Insert (WE 0311)
• Short WFF300 Filter Insert (WF 0310)
• Steel Lid (WF 4001)
• Lifting Handle (WA 0305)

Verified Technical Specifications

The following specifications have been reviewed for internal consistency.

Available Models

Included Components

• Polypropylene filter housing
• 12 in inlet connection
• 12 in debris outlet
• 8 in filtered water outlet
• 380-micron stainless steel filter insert
• Baseplate
• Lifting handle
• Composite or steel housing cover
• Rotating upper and lower housing sections for installation alignment

Technical Consistency Notes

The specifications are generally consistent. Two minor clarifications are recommended for publication:

1. State the collection area as 32,290 ft² (3,000 m²) to provide both imperial and metric values.
2. Express the filtration performance consistently as “Over 90% filtration efficiency at flow rates up to 222 GPM (14 L/s)” to avoid confusion between maximum flow capacity and filtration efficiency.