I've used sump pumps mounted inside a five gallon bucket, that I got from a local big box store to drain my ponds. Doubt they are rated for continuous use and may not be very efficient though. JKB?
Stoney Creek Equipment Company, an advertiser on the site, has a line of pumps as does Pentair/AES.
Any of the pumps rated for continuous use for waterfalls in Koi ponds would work.
Last edited by Cecil Baird1; 12/30/13 07:38 AM.