Low pressure after moving filter

[mas985]

The primary difference between an AG and IG pump is that AG pumps requires a flooded suction as I mentioned before. This is because the design of the wet end of the pump has a higher NPSHr (net positive suction head required) than IG pumps and will cavitate easier than IG pumps if there is not enough NPSHa (net positive suction head available). You can learn more about this here.

So when you moved the pump away from the pool, NPSHa decrease and could have gotten lower than NPSHr which would start to impact pump performance and if it had gotten low enough it would cause cavitation although I don't think that is the problem here.

Another difference between AG and IG pumps is that most AG pumps have a lower maximum head (i.e. smaller impeller diameter) so they don't work well for long plumbing runs or for solar on roof tops.

For all the above reasons, AG pumps can be manufactured cheaper than IG pumps but because of that have more restrictions on the operation such as flooded suction and low head loss plumbing.

[EricD]

The discussion has moved on to this thread. I'm writing the results here for future visitors with the same problem.

The consensus is that a small inground pump would have been a better fit for this setup, but the original pump works fine. The real problem was a clogged filter cartridge that clogged very fast with pollen.