I have noticed over the past month that my filter pressure does not decrease after backwashing. The gauge does go to zero when the pump is off, so I think the gauge is OK. It also does decrease slightly when I set the multiport to recirculate.
During the time I have been watching this, the gauge is almost always right around 20 PSI. My previous clean pressure used to be closer to the 12-15 range.
Some additional background:
I have had a leaky pump seal for a while. It was an older pump so rather than replace the seal, my home warranty company agreed to replace the entire pump with a new Hayward Super model. This happened yesterday.
Any recommendations of things to check regarding the gauge issue?