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Your old system was probably a drilled deep well. 4 or 6 inch casing and 200 ft or so deep. Most deep wells use 40-60 pressure settings. You probably have a bored well at the new place. 30 inches or so in diameter, a concrete smooth culvert type pipe casing going anywhere from 30 to 60 ft deep. For some reason, most of the shallowed/bored wells around here in GA have 20-40 switches and pumps. You need to determine that your pump is up to the higher pressure. Look at technical info on the pump or talk to a local well expert to determine if the pump is capable of having the pressure raised this much. Wouldn't want to see you burn up a pump because it isn't rated for the higher pressure. Second issue, and just as important, it the tank. Your old well probably had a plain galvanized metal tank (you said it was "large") that has an air head directly in contact with the water. Probably had a sniffle valve on the side of the tank to maintain the air/water levels in the tank, as air will asorb into the water over a period of time and this type of tank will become water logged and cause constant cycling of the pump. Your new well has a "small" tank, probably a bladder tank or captive air tank. The air charge in the bladder MUST be set so that it is (in PSI) two to five psi less than the pump on (low number) pressure switch setting. This allows the bladder to be pushing water out of the tank when the pump kicks in. Better for the bladder as it doesn't fully expand and contact the inside of the tank, and also prevents you from losing water flow momentarily just before the pump cuts in. Pressure switches are manufactured for operation in certain specific ranges. While they do have some adjustment your present 20-40 switch will not properly adjust to 40-60. If it does adjust that far, you will probably lose the 20 psi spread and the switch will not operate properly. A trip to Lowes, Home Depot, Menards, your local hardware store, etc, will get you the proper switch, pre-set, but don't forget to adjust the charge in your air tank (providing it is rated for the higher pressure, a few are not. Charles
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