Self-cleaning filter for use
in round sump tanks / settling chambers
Garden pond and koi pond owners no longer have to wait for the answer to their frequent filter cleaning. After a vortex microstrainer (VMS) has been installed, simply open a single waste dump valve once a week. It is super simple and it's virtually maintenance-free.
How does it work?
1. Water flows by gravity
into a vortex-style sump (or it can be pumped in and drained
out by gravity-flow), where it is directed at the VMS, which
causes it to rotate.
What you need: A round, sump tank, at least 28" I.D. and 28" deep; a sump inlet pipe that directs water around the sump, causing it to rotate; a sump outlet pipe that can be located vertically in the center of the sump, at least 16" below the normal water level; a pumping rate or gravity flow rate between 20-150 gpm; a 3/4" PVC water return line to carry water from the pump to the spray bar. The sump also needs a drain valve, so the captured waste can be easily dumped. Plus, a shut-off valve should probably be installed on the inlet pipe to completely empty the sump.