I am working on a project in a 6,000 square foot custom home.
The home has a deep well that can't keep up with demand. As a solution, someone installed a couple 200 gallon (5' tall) non pressurized storage tanks, a booster pump and well pressure tank. The well keeps the storage tanks full and the booster pump pressurizes the house.
The problem is that the booster pump frequently air locks due the the fact that it only has 2'-5' of head pressure on the inlet. The fact that the home is 10,000 feet above sea level (~10 psi atmosphere) isn't helping much either.
The home requires about 15 gpm @ 70 PSI
Here is the installed pump and system curve. The sizing is about right, the NPSHR is a problem at 5.5'
Does anyone have a suggestion for a pump with lower NPSHR requirements? Shallow well pump?
Thank you in advance.