T,
Obviously, as the pump speed changes the Filter pressure changes. As the filter gets dirty, the filter pressure also increases.
15 lbs. could be high or low, but there is no way to know unless you know what your clean filter pressure is, at a fixed pump speed, and with the heater in line. Each pool is different, so you need to determine what the normal pressure for your pool.
As an example.. I have no heater and a large cartridge filter, and my filter pressure at 1200 RPM is about 1 to 2 lbs. My point being you can't use any number, you have to use a number that relates to your pool's plumbing.
Troubleshooting needs to start with a known baseline. If you think your filter is dirty, clean it. How often do you backwash? How often do you open the filter and clean the grids?
I would have though gauge would be much higher with fairly slow flow at 2700
That is not how it works.. The slower the flow the lower the pressure. The filter gauge is not a indication of how well the pump is working, it shows the amount of
effort it takes to push water through the system. It takes more effort to force more water through the plumbing and a dirty filter just makes it worse.
Thanks,
Jim R.
