Optimized Level of the Pump....

Air should not get in the filter when the pump is off anyway so that is not really a good reason to put everything below water levels. If the filter did accumulate air, it would mean there is an air leak and that should be fixed. I think putting everything below water level will just complicate your life and is not necessary.
 
In a properly sealed installation once the system is primed no air can get into the system unless you open it somewhere. Shutting the pump off won't allow air in. Sounds like he's playing CYA (not the acid) in case of bad plumbing.
 
This is my first post to this forum, which I joined to mine all the information I could from you long-time pool problem-solvers. Before I submit my problem to the experts, I must perform two additional tests ( suction-side vacuum & timed fill-the-buckets flow-rate tests). I have read the Pool-School data and Hydraulics 101 treatise and have done the bucket test to determine whether leake exist. I have also done the shaving-cream test around the rim of my pump basket & all suction-side valve stems ( no leaks). With regard to this thread, I am replying to the query about placing the equipment pad below pool surface level. My pool was built in 1954 on a 30* hillside, using an existing garage as the form for the concrete. The pool depth is 8-1/2', even with the floor of the garage. The concrete pad to the rear of the garage is 3' higher then the floor. As my signature says, the pad is 5-1/2' below pool level. While I have had my share of problems in 40-1/2 years, I cannot positively pin any of them on the placement of the pad. After I perform the next two tests I will submit my problem to the Equipment Group members for their considered opinions.

Garry
 
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