[icemann427]

The average water use per day per person is 150 gallons. As such, between you and your neighbor you need 1,650 gallons per day without taking into consideration irrigation and other ancillary water uses. Most of that daily water use comes in the evening when everyone is home and activities from cooking, washing clothes, washing bodies, and other things are occurring. As such, you need a water holding tank, boost pump, and bladder tanks that will adequately supply that evening surge.

In the past, I used to develop and sell residential lots where there were normally nine lots serviced by the one water well that I contracted out to be built. I did this many many times and I would always overbuild the water systems as I never wanted my buyers to ever have water supply/quality issues. For the nine lots, I would include a 10,000 gallon underground storage tank; two boost pumps; three bladder tanks; 2.5" supply pipes; and an in ground well pump hp more than adequate to bring the water up the requisite underground distance.

It may be an overbuild, but you may think about adding a 2,000 gallon storage tank, one boost pump, and move your current bladder tanks to the well site so they work in unison (this would help you more than your neighbor). Not knowing the distance of the water runs and the size of your piping, I'm not sure if the current diameter of your piping is adequate or not, but if the run is not too long, maybe you might consider larger piping if you are using a 1" line.