I have an inground pool, approximately 20,000 gallons. Haven't used it for 3-4 years. Tried to start it and the pump would turn on but would not pull water. Took the pump to a pool store and they said it sounded like the bearings. As they did not carry or service the pump I ordered one from you. The pump is a Century, CAT# B2848, 1 HP. I installed the new pump and it turns on and spins but still does not pull any water. I'm at a loss where to go from here. Could the problem be the impeller and, if so, where would I get one?