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I just bought a house and my water pressure isn't the greatest. When I looked at it, the pressure switch is for 30 50. When checking the cut-in and cut-out, it was at 35 55. Can it be set higher like that or should I change it back to 30 50?

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  • Hello, and welcome to Stack Exchange. I presume this pressure switch is for a well pump? Some more information (edited into your question) would be helpful. – Daniel Griscom Sep 18 '16 at 16:28
  • Since you have a pressure switch do you also have a water pressure tank? Also what is the pressure at an actual faucet or water bib. – spicetraders Sep 18 '16 at 16:50
  • The key element here is what preasure is the pump optimized to operate? Continuing to increase pressures beyond the pumps design will only lead to overheated motors and more electrical expense. The max pressure is also not the same thing as operating pressure. – Tyson Sep 19 '16 at 0:16
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You can raise the pressure switch-points by adjusting the pressure switch. It's not uncommon to run at 60/40, and 70/50 is also possible.

The limiting factors are:

  • Your pressure switch (though as Ed says, most go to 90 or so)
  • The fixtures in your house. Toilet valves in particular can start to leak at higher pressures, and the next big one would be connections made using compression fittings and smaller tubing like fridges, ice makers and humidifiers.
  • Your well pump. It may not be powerful enough to actually reach the cut-off pressure, or it may take an excessively long time.

You can also increase the size of your pressure tank. This will make the pressure drops and surges smoother and last longer as it takes longer for the pressure to drop to the cut-in pressure, but it'll also take longer to fill it up. The pump will run less frequently but for longer.


There's also a number of variable speed pumps on the market, and those will actually maintain a certain pressure fairly reliably. This is most noticeable while using water continuously such as in the shower or using a hose outside. One of the other benefits is these only need a fairly small pressure tank.

This obviously requires replacing your pump (and it's more expensive than the equivalent standard pump) so it's probably not a good option unless you needed/wanted to replacing the pump anyway.

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By changing it down to 50 your pressure will be lower. Most of the switch's I have worked with are preset by increasing the spring pressure many can be raised to 90. When increasing the adjustment if it gets hard to turn stop or the switch may be damaged. Added for clarity The switch sets the pressure in fact it is an electronic regulator. If the water pressure is not sufficient most switches can be adjusted to increase the pressure thus increasing the flow from the pressure tank. Many switches come adjusted from the factory with set points listed on the switch. If the switch is adjustable increasing the tension will increase the pressure by allowing the pump to run longer until the desired pressure is reached. If there are 2 adjustments 1 is for the span between the pump turning off when at pressure and when it turns back on.

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  • Ed. is it not the case that the pressure switch (PS) for the well pump is a switch and not a pressure regulator. I:E: when the pressure drops below a preset number the PS then switches on a WELL PUMP and switches it off when the maximum preset is reached. It does not increase or decrease water pressure. Maybe the op used the term switch instead of regulator. – Alaska Man Feb 27 '17 at 3:05
  • @alaska man, have you never worked on a well before? Most pressure switches are adjustable some move cut in and off together and some the high and low pressure are individuly adjustable. I have installed , repaired and replaced well over 100 in career. If you adjust the pressure set point it adjusts the pressure output. The 30/50 is the factory setting and by adjusting the the switch this usually can be increased. – Ed Beal Feb 27 '17 at 3:18
  • i did not say you were wrong, I asked nicely. Are you saying that a pressure switch controls how much output the well pump is supplying. I:E: it speeds up or slows down the pump itself in order to change the pressure that the pump is supplin?. The well i have worked on was set just as described, when the the pressure tank was depleted to set pressure ( the low limit ) the switch would then turn on the well pump in order to supply more water to the tank and shut of the pump once the tank reached the proper pressure ( high limit ). My pump is either off or it is on. – Alaska Man Feb 27 '17 at 10:40
  • It would be helpful for the op and anybody who reads this if we could have detailed explanation of how the pressure switch in conjunction with the rest of the water supply infrastructure effects the water pressure of the home. I am sure i could learn something. that is in fact why i asked. – Alaska Man Feb 27 '17 at 12:07

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