My system is running at 7-8 psi this year which is down for the previous season of 10-12+psi. I have cleaned all the strainers, ran the system without the filter cartridges and have disassembled the pump impellor for cleaning and inspection (nothing clogged). Visually, the flow rate is lower than the previous season which made me begin this investigation.
The pool is a typical pool with a shallow and deep return jet, deep-end bottom suction and skimmer.
What is the next logical step for troubleshooting this problem? Plumbing inspection? Motor tuneup/overhaul? I am uncertain of the age of the pump.
Thanks for all the help!