Product review (5 stars): Nice part solidly built but unlikely you actually need it unless water is dripping out on your floor - I didn't
I ordered this assuming that it had moving parts.  Turns out the body is just that - a shell (no propeller blade or other moving parts) so unlikely it would ever need to be replaced unless something caused it to crack like freezing.  Mine was fine and I left it in the machine.  I just replaced the pump (which doesn't look much like a pump thus my assumption that this shell contained moving parts) and tossed this shell in the can.