Hi, I just installed a new Rheem gas heater to replace my old heat pump, and a new whisperflo pump. The other major difference is before I had piped the system with the flexible piping so there were no 90 degree turns, now there are several elbows and hard pvc piping. Thing is the pressure gauge on the filter reads much higher than before. Used to be after a new load of DE the gauge would read 15 lbs and I would backwash at between 25 and 30 lbs pressure. Now on start up the gauge is reading about 24 lbs. Is this going to be my new normal reading? Will I now wait to 40 lbs to backwash? Or is there something wrong? I did backwash once already and the reading stayed the same at 24 lbs. What do you think? Thanks.