We are the exclusive U.S. dealer for WISY filter products: The best in rainwater harvesting worldwide!

Self-cleaning WISY filters operate as a first flush device, directing leaves, dirt, and other debris to the stormwater system and diverting up to 95% of the clean rainwater to a storage tank. 

The Smoothing Inlet prevents incoming water from stirring the tank and oxygenates the water. 

The Floating Filter ensures intake of the cleanest water from just below the water surface.

The Multi-Function Overflow Device skims floating particulate on the water surface and protects water quality. 




  • Check gutters for organic matter and debris
  • Check downpsout connections for organic matter and debris
  • Wash stainless steel filter insert 2-3 times per year
  • Reduce the frequency of post-tank filtration component maintenance
  • NEVER replace components
  • NEVER clean the tank

The Competition

  • Check gutters for organic matter and debris
  • Check downspout connections for organic matter and debris
  • Clean filters after every rainfall
  • Replace cartridges in post-tank filtration components more frequently
  • Replace failing components over time
  • Drain and clean tanks yearly

A rainwater harvesting system designed with WISY products requires minimal maintenance and never needs replacing.

With a WISY filter, you'll never clean your tank again. 


Watch the videos below to see the advantages of the WISY rainwater harvesting filters.