GRAYbarrel external filtration design:
Because water is pumped through the filter, instead of relying on gravity, much less graywater is lost to overflow.
In addition, the filter can be placed in an easily accessible location away from the pumping unit. This is a major benefit for crawl space plumbing installations.
Internal Filtration Issue:
Previous graywater pumping systems included internal filtration media, resulting in significant graywater loss.
With a clean filter, graywater passes easily by gravity from the inlet / overflow chamber, through the filter media, and into the pumping chamber (below).
When debris collects in the filter media, graywater cannot pass through the media by gravity as quickly as it arrives in the inlet / overflow chamber. Water builds up in this chamber and drains to waste (below).