1) 1.5"-2.0" DN 2) 6 positions valve sand filter 3) Top mount design 4) UV resistant,corrosion-proof Hydroswim Top mounted sand filter,swimming pool sand filter,fiberglass sand filterF/HS/T350--F/HS/T350Applications This kind of sand filter is particular for home swimming pool,water park water treatment,water purifying and water fitrationFeature and advantage1.The sand fitler adopt materials used ...