After backwashing until the sight bubble is clear (5 mins?), and I use the skimmer, I get 17-18 psi. It'll run for days and only go up 2-3 psi. I just want to make sure that sounds about right, or if I have a problem. It's a year old 1/2hp whisperflow. If I switch it to bottom drain, I get 16psi, and with a mix of both it goes up to 19 psi.
The guy who repaired my pool heater commented on the 1/2hp being very small for a 17k gallon pool that it should be a 3/4 or more. Is there an issue with a 1/2hp pump?