The one piece Meteor® Top Mount filter tank is manufactured for use with a top mount multiport valve. The even flow overdrain is built into the valve body for a perfect hydraulic flow pattern. This filter incorporates the design features specified by the top 100 sand filter dealers in America. The Ultimate Pressure Vessel Superior spherical design Uniform wall thickness 6-position top mounted multiport valve 1 1/2 inch pressure sand drain Base and plumbing kits now available Sand funnel supplied METEOR 18" SAND FILTER WITH MULTIPORT VALVE Regular price: $498.73 Sale price: $273.63 METEOR 20" SAND FILTER WITH MULTIPORT VALVE Regular price: $532.20 Sale price: $319.97 METEOR 22" SAND FILTER WITH MULTIPORT VALVE Regular price: $549.26 Sale price: $373.63