Details: Sheet molded fiberglass tank, 2-inch threaded female connections with Noryl rotary backwash valve. Maximum Operating Pressure 50 PSI, 2-inch plumbing connections provide maximum flow. Corrosion-resistant 20-inch diameter fiberglass filter tank for strength and durability. Unique Spiro-Mite grid design provides high efficiency filtration and longer filter cycles. Exclusive clamp ring design is proven to be safe, strong and reliable. It allows for quick and easy access to internal components. Effective filtration area is 47-square feet, flow rate of 94-GPM, turnover capacity is 8 hour-45120 gallon, 10 hour-56400 gallon, 12 hour 67680 gallon. Measures 21-7/16-inch width by 42-7/16-inch and 5-inch height. Measures 22-inch length by 39-inch height by 22-inch width.