I had a slight malfunction with the wet end on my above ground pool (24ft round). I now need a new one but the motor (Century Flex 48, 1hp) is fine. I keep getting mixed information on replacing the wet-end and of coarse the pool places want me to buy a complete new pump. I am not a complete dummy and I have already disassembled the old wet end from the pump. What I need to know is if wet ends are interchangeable and if so what to order. Thanks for the help.