This stainless steel Inline Downspout Rainwater Filter is engineered for plum, above grade installation in a single vertical rainwater downspout. When properly installed it can filter rainwater from flat roofs up to 1000 square feet, diverting 90% of the clean water to storage tanks for non-potable uses like irrigation and car washing. Provided with the filter and its housing is a PVC downspout conversion kit that simplifies installation.