Swimming pool filter pressure gauge suddenly showed abnormal pressure drop from 27psi to below 10 psi. Swimming pool fountain features also noticeably lost pressure. Pump was running louder than usual. No visible leaks.
So before calling specialist I decided to remove filter basket and check if something is stuck in impeller:
I have cleaned filter basket couple times and have never paid attention to what I believe to be diffuser (part # R0445305) to be sticking out like that in housing. Is it normal? Could it be the culprit for low pressure?
Model number is centurion 193995xcn.
Update#1 in response to comments
Here is picture with model number visible:
The housing was full with water and there was no air at all. I believe this proves that pipes on the pump's intake side are not cracked and are not pulling in air, right?
The main drain and two skimmer pipes join together just before the pump. Since I have operated pool with just one skimmer on (when suction vacuuming pool) without such noticeable pressure drop, then would this prove that pump's pipes on intake side are not clogged?
If any of pipes on pump outlet side were blocked then the pressure at the filter should be unusually high and not low, right?