Water Pressure Drop

[Tuna Fish Sandwich]

Hello, have a 26ft travel trailer. Should water pressure stay consistent without pump on and not on city (hold pressure)?
I am losing 2 psi a day with system idol. That is at 52 psi day one, 50 psi day two, 48 psi day 3, ect..
I just put in new pump, small expansion tank, pressure gauge and toilet with pex but all connections feels dry. Just wondering if this is acceptable pressure loss or should i look into this further? Thanks!

 

[TheLooks]

So you want to turn off the pump and have the pressure hold completely? The check valves in these cheap pumps may not facilitate that. You can add a second check valve inline either before the pump or after the pump. They come with male and female sides to get the flow right(direction). I would do a thorough check of all fittings and not worry about the loss.