My pressure gauge is running around 20 after replacing the standpipe, manifold and laterals. Before the repair, the pressure gauge was between 10 and 15. Two days ago I found that my manifold was in about 3 pieces hence the replacement. My question is, should my pressure gauge be reading that high? After I backwash and rinse it stays at about 12 for a few minutes and then creeps back up to around 20.