Our Carvin sand filter comes in 3 different sizes. Upper distribution system integrated into the dial valve and engineered to direct water evenly across the entire surface of the sand - up to 25gpm/sq.ft. (61 m3/h/m2) without sand migration or channeling. 7-way dial valve with "sight glass" automatic air relief, and pressure gauge. The 7 functions are : Non-Corrosive resin clamp for simple installation and service of dial valve and filter components. Underdrain with "side-slotted" laterals draws water evenly across the full diameter of the sand bed for higher flows, better filtration, longer cycles and more efficient backwashing. Features heavy-duty, freeze resistant hub and easy-service "Snap-fit" laterals. Deep, high-capacity sand bed carries more debris and extends filter cycles. Blow-molded tank is corrosion-resistant and UV-resistant. Bottom drain for winterizing and draining. Hose and hardware included. ****SAND NOT INCLUDED
