I am in the process of an extensive rebuilt of my pool. It is 16x32 20k gallon vinyl liner inground. Waterfall is on a seperate pump so I will exclude any of that info here.
In the discussion with PB we agreed a 3/4 to 1 HP 2-speed pump is what was going to be used. That info I got here on this forum. Anyway he used a 1.5hp with a service factor of 1.6 for total HP of 2.4HP.
My lines are as follows;  main drains attached to one [2"] line traveling about 50 foot to pump,  skimmer line also 2" running about 40 foot. I also have  2" returns running 15' and 40'.
Running on low speed a get pressure reading of about 4 psi at the filter. Flow seems just as good as my old set-up [1 hp pump with 1.5 line]. High however runs much higher [28 psi] and seems loud. My old set-up ran at about 10 psi.
I am sure it is relavent so here is my equipment. I have AquaCal heatpump and and autopilot SWG. The filter is a Hayward 48?? DE filter.
Is this too high of HP? Is it bad other than using too much energy? Can I change the pumps HP to lower when motor goes in 10 or so years? Should I ask the PB for a different pump?
Thought or advice appricated.