Features a unique, manually operated agitator for dislodging over 90% of the pond residue that accumulates in the filter chamber. Easy to use valve can be switched to backwash, filter , rinse or waste. Optional UV available to convert this unit with a 10w UV. 20″H 17″ Dia. 17′ cord. Filters up to 1000 gallons. Max pump flow 2000 gph. 1.5″ FNPT fittings. 1 year warranty Also available with optional 10w UV