re: Anyone have experience with well water tanks?

as I said before, I have no experience at all with wells and tanks...but I do have experience with pressurized fluids and can tell you that in order to maintain a steady pressure, there has to be airspace above the fluid...

fluids aren't really compressible, so they don't stay pressurized...there is almost always a gas (air) that is actually being compressed along with the fluid and that is what allows a relatively steady pressure...

so yes, a larger tank would hold pressure steady longer as long as there was more airspace in it as well as water....


ETA: I know this is probably more than you wanted to hear, but it may give you some insight as to how the entire system works...