Thanks Rob,
That was easy enough to fix, but now when I turn it on there's no water pumping at all. The motor sounds fine, but no water movement at all.
When I first installed it, it primed but pumped water a bit weaker than I was expecting.. it ran overnight but by morning (today) it was barely moving water and not primed. I cleaned out the basket, backwashed and everything seemed to be ok again, but as the day went on it kept getting weaker. That's when I fixed the diffuser gasket.. Now it runs but won't pump water.
Is there something else I could try, or should I contact customer support?
Thanks again for the help!