WISY Rainwater Downspout Filter

• Filters roof runoff from roof areas up to 1,600 sq ft.
• Connects directly to a single vertical downspout.
• Ideal for rain barrels and small rainwater harvesting systems.
• Suitable for irrigation, vehicle washing, and other non-potable applications.

High Water Recovery

• Diverts up to 95% of clean rainwater to storage.
• Separates leaves, moss, insects, and debris before water enters the tank.
• Gentle Gravity Filtering technology maintains downspout flow capacity.
• Continues filtering during heavy rainfall events.

Durable Stainless Steel Construction

• Stainless steel housing resists corrosion.
• Stainless steel filter insert provides long service life.
• Frost-resistant construction for outdoor installations.
• Designed for years of dependable operation.

Low Maintenance

• Self-cleaning filter design reduces buildup.
• Filter typically requires cleaning only a few times per year.
• Filter insert is dishwasher safe.
• Easy access for seasonal inspection and cleaning.

Easy Installation

• Installs directly into a vertical round downspout.
• Compatible with metal and plastic downspouts.
• Includes mounting hardware and outlet connection components.
• Optional converter kit available for rectangular downspouts.

Overflow & First Flush Protection

• Provides automatic overflow diversion when the storage tank is full.
• Directs debris and contaminated initial runoff away from the storage tank.
• Helps improve harvested rainwater quality before storage.

• Maximum roof area: 1,600 sq ft
• Water recovery: Up to 95%
• Filter mesh size: 280 micron (0.28 mm)

Installation

• Above-ground installation
• Single vertical downspout connection
• Compatible with round downspouts
• Rectangular downspouts require optional converter kit (BE 0301) and minimum 20″ vertical round pipe section above filter

Materials

• Housing: Stainless steel
• Filter insert: Stainless steel

Applications

• Irrigation
• Vehicle washing
• Rain barrels
• Non-potable rainwater collection systems

Maintenance

• Self-cleaning filter design
• Remove and rinse filter insert as needed – filter is dishwasher safe
• Recommended inspection and cleaning twice per year

• Mounting clip and screw
• Hose and tension ring

Product Number

• FS 0304 (RH9510-04) – 4″ Downspout Connection

Optional Accessories

• Downspout Converter Kit (2″ x 3″ and 3″ x 4″ downspouts)
• Blind Insert for diversion during maintenance