MY brand new march pump squealing like a pig, unless there is water "load" on it. figured out that the wobble on the shaft making the noise, thought maybe it was the end play, Really annoying ! Its the bronze housing one so called top of the line unit ! Thinking about returning it. Anyone else experience this ? Love the magnetic pump idea so i can fly sparge by reducing flow and it wont hurt the pump, but man its loud when it squeals at the end of pumping and gotta run and shut it off.