Astralpool Clarity Filter 21.800 l/h Ø 600 Outlet 2″ Mod. DE-48, diatomaceous earth clarity filters manufactured in polyester and fiberglass. Equipped with manometer, air purge and side manifold valve. Diatomaceous charge not included. Filtration velocity: 4.9 m3/h/m2. The 1 ½” valve code is 15385, the 2″ code is 15389.