I would never have thought about higher pressure reading with guage below water level. Great information to know now.

I see what you about setting the impeller clearance larger. I like to avoid future problems whenever I can but sometimes go too far the other way and end up causing other problems. I will probably set the impeller back to how I had it which was closer to instructions on how to set it.

Now that I know that 20 psi isn't out of a normal range, I can be more corfortable with the higher pressure.

Thanks for all the info.