The Pondmaster Clearguard Pressurized Pond Filter assists in keeping your pond fresh and clean with dual-action filtration. The Heavy-duty poly canister can be buried for hidden installation to not distract from your pond’s natural environment. 7 Functions: Filter, Backwash, Rinse, Winterize, Empty, Circulate and Close. The Valve Selector is a multi-function valve that easily clicks into place for convenient filtering, backwashing, rinsing and winterizing. It directs water flow in different ways throughout your filter. Includes Media for maximum Water Clarity and Healthier Ponds. Reusable Foam Pad Removes Fine Debris and Polishes Water Quickly. Includes both PVC Slip Fittings and ABS Barbed Fittings. Optional Clearguard Backwash Air Kit Available for Ultimate Performance. 5,500 Gallon Capacity, Weight: 22 lbs., Product Dimensions: 17" diameter x 28.5" high, Fittings: 1 1/2" & 2" PVC Slip & ABS Barb, Maximum Pressure: 15 PSI, Recommended Water Pumps Up to 6000 GPH along with Recommended Backwash Air Kit Small with AP-40, Item #15660 Items sold separately.