NEW from Pondmaster The Pondmaster Pressurized Filter System with UV features a unique, manually operated agitator for dislodging over 90% of the pond residue that accumulates in the filter chamber. This patent pending feature is employed during the backwash and rinse operation. Model PUV-1000 1000 Gal. Capacity with 10W UV 20"H 17" Dia. 17' cord. Filters up to 1000 gallons. Max pump flow 2000 gph. 1.5" FNPT fittings. 1 year warrantee Built in UV Sterilizer for Maximum Algae Control Features : Agitator unlocks waste from media saving the amount of water discharged during backwash and rinse cycles. Unique, patent pending 3-way master valve locks into run, rinse, and backwash settings. Clear-vue inspection port to monitor water clarity during backwash/rinse operation. Positive pressure lock ring to ensure a tight water seal. Reusable Bio-Matrix Media affords maximum surface area for beneficial bacteria growth. Integrated waterproof UV transformer. Heavy duty poly canister can be buried for hidden installation. Optional field-installed bottom drain available (not included) Can be easily operated using a single energy-efficient magnetic-drive or similar pump. (not included) Does not require a high-pressure pump to back wash. POND KING RECOMMENDED !!