WISY Stainless-Steel LineAr100 Rainwater Filter

WISY Stainless-Steel LineAr100 Rainwater FilterThe LineAr 100 VA installs directly inside the tank with very little vertical drop required, making it ideal for tight layouts where the roof outlet and tank inlet are close in elevation. Built entirely from stainless steel, housing and filter insert, it is the premium choice for homeowners and installers who want durability and longevity built into every component. The collected rainwater is naturally soft, making it well suited for non potable uses

The LineAr 100 VA installs directly inside the tank with very little vertical drop required, making it ideal for tight layouts where the roof outlet and tank inlet are close in elevation. Built entirely from stainless steel, housing and filter insert, it is the premium choice for homeowners and installers who want durability and longevity built into every component. The collected rainwater is naturally soft, making it well suited for non-potable uses such as toilet flushing, laundry, and irrigation.

Whether you are building new or retrofitting an existing system, the LineAr 100 VA fits into your current pipework without additional excavation. With just 2" of height difference between the rainwater inlet and the dirty water outlet, it works perfectly in systems where elevation between roof and tank is minimal or where no existing filter is in place.

The LineAr 100 VA is designed with a vertical stainless steel mesh rather than a horizontal screen. Instead of debris settling on the mesh and causing clogs, it passes straight through and washes out to the drain. Clean water is directed into your storage tank and the system keeps working reliably storm after storm. One of the biggest benefits of this design is how little upkeep it needs, with most users cleaning it just 2 to 3 times a year.

Also available in a polyethylene housing (LineAr 100 K).

Key Specs: All stainless-steel construction | 440 micron stainless steel filter mesh | Over 90% rainwater capture at 22.2 GPM | Up to 2,648 sq. ft. roof capacity | 4" connections on all three ports | Only 2" height difference between inlet and outlet | 5-year WISY guarantee

Features and Benefits

High-Efficiency Vertical Filtration

The 440 micron stainless steel mesh is positioned vertically inside the housing. As rainwater flows through the filter, clean water passes sideways through the stainless steel mesh and is directed to the storage tank, while leaves, roof granules, and debris continue flowing past the mesh and out through the storm drain. This vertical orientation prevents particles from accumulating on the mesh surface, which is a common problem with horizontal or angled filter designs that trap debris and restrict flow.

The filter removes leaves, roof granules, moss, and fine sediment while achieving a water yield greater than 90% at a flow rate of 22.2 gallons per minute (1.4 liters per second). The pipe diameter is uniform throughout the entire housing, keeping flow consistent even in heavy storm events.

Water Quality Suitable for Non-Potable Household Uses

Rainwater filtered through the LineAr 100 VA is clean and naturally soft, making it an excellent source for toilet flushing, washing machine supply, and garden irrigation. These applications represent the most common residential uses for harvested rainwater and account for a significant portion of total household water consumption.

All-Stainless Construction with 5-Year Guarantee

When it comes to durability, the LineAr 100 VA leaves nothing to chance. The filter housing and filter insert are constructed entirely from stainless steel, delivering exceptional corrosion resistance and a service life that plastic-housed filters simply cannot match. With no wearing or moving parts, reliable operation is built in from day one. WISY backs this product with a 5-year guarantee against manufacturing defects.

Low-Maintenance, Self-Cleaning Design

The vertical mesh design continuously flushes debris out through the storm drain connection during rainfall, so the filter stays largely clean on its own. Routine cleaning is typically needed only 2 to 3 times per year, though cleaning at no less than six-month intervals is always recommended. The stainless steel filter insert lifts out by hand from ground level using the included lifting handle, no tools required and no need to enter the shaft. The insert is dishwasher safe or can be cleaned by hand with warm water and dish soap.

Flexible Installation for New Builds and Retrofits

All three connections use standard 4" pipes, which aligns with common residential and commercial drain pipe sizing. The filter can be installed in the access shaft of a concrete, polyethylene, or flat rainwater storage tank. Its compact footprint and low headroom requirement make it one of the most adaptable options available for installations where space inside the shaft is constrained.

Minimal Height Difference for Easy Retrofits

There is only 2" of height difference between the rainwater inlet and the storm drain outlet, which is the key advantage of the LineAr design. This makes it straightforward to integrate into existing piping without regrading or extra excavation. It is also ideal for replacing existing systems that have a dirt trap, or for retrofitting into tanks that have been operating without a filter.

Specifications

Performance

• Maximum roof area (temperate climate): 2,648 sq. ft.
• Water yield: Greater than 90% at 22.2 GPM (1.4 l/sec)
• Filter mesh size: 440 microns (0.017")
• Height difference between inlet and outlet: 2"

Construction

• Housing material: Stainless Steel
• Filter insert material: Stainless steel mesh, 440 micron
• Wearing or moving parts: None
• WISY Guarantee: 5 years from date of purchase

Connections

• Rainwater inlet: 4"
• Outlet to rainwater tank (filtered water): 4"
• Outlet to soakaway or storm drain: 4"
• Number of connections: Three total, all 4"
• Pipe alignment: Horizontal (inlet and storm drain); vertical (tank outlet)

Dimensions

• Overall length: 18 3⁄4"
• Housing body length: 14 2⁄5"
• Inlet pipe diameter (external): Ø 4 ¼"
• Outlet to tank diameter (external): Ø 4 2⁄5"
• Storm drain connection diameter: Ø 4 ¼"
• Internal height difference (inlet to storm drain invert): 2"

Installation Requirements

• Inflow pipe gradient: Approximately 1%
• Straight inflow calming section required: Minimum 20" (.5 meter)
• Storm drain outlet pipe nominal size: Must be equal to or larger than inlet pipe
• Filter insert access: Must be removable from ground level without entering shaft
• Housing orientation: Must be installed level; filtered water outlet must be exactly perpendicular

Maintenance

• Recommended cleaning frequency: 2 to 3 times per year
• Cleaning method: Dishwasher safe, or hand wash with warm water and dish soap
• Filter insert removal: Lifts out using included lifting handle, no tools required

Product Information

• Item number: LF 1100
• Country of manufacture: Germany

Downloads

Download Spec Sheet

Download Installation, Operation, and Maintenance Manual

Parts & Accessories

Installation Accessories

Videos

This video features a similar model. While design and materials may differ, performance and installation are comparable.