The WISY garden rainwater collector connects to a single vertical rainwater downspout and can filter precipitation from a roof area up to 1,000 square feet for irrigation, car washing or other non-potable uses. The filter is installed above-grade in the vertical rainwater downpiping to direct debris to the stormwater system and divert clean rainwater to the storage tank or rain barrel. The filter also acts as a first flush device. This filter should only be used with round downspouts or with a converter kit providing at least 20™ of vertical round pipe above the filter.