Hello - My pool has hovered around the same filter pressure of 10-12 PSI since install 10 years ago. My pump is a 1 Hp and is located 10 feet from the outside edge about 4' above the water level. Pool is 18x36 with 1.5" PVC Piping. Obviously the pressure hasn't been a big issue considering it has worked fine and still does. My question is would it be a bad thing to go to a 1.5 Hp variable speed or two speed pump? Are there any drawbacks to increasing the pump motor size other than 1.5 hp uses more power. Opinions and advice are appreciated.