Intex Krystal Clear Sand Filter Pump for Above Ground Pools, 12 Make sure this fits by entering your model number.; Keep your above ground pool water clean, soft, and refreshing with the Krystal Clear Sand Filter Pump by Intex. The all natural sand provides excellent water filtration as the 6-function control valve allows the pool owner to: filter, backwash and rinse, recirculate, drain and close the system. INTEX KRYSTAL CLEAR 633T OWNER'S MANUAL Pdf Download | ManualsLib Remove the Krystal Clear™ filter pump and hoses from the packaging. 2. Place the filter pump in such a manner, that you can easily assemble the hose (8) connections to the plunger valve. Page 10: Operating Instructions (109) MODEL 633T FILTER PUMP ENGLISH 7.5” X 10.3” PANTONE 295U English OPERATING INSTRUCTIONS 1.