I have a well with submerged pump and captive-air tank in the pump
house 350 ft. from where I'm building my new house. I'm using 1 1/4"
flexible waterline to connect to house. I am not too impressed with
the pressure I get at the end of the garden hose (5/8") 360 ft. from
the well. Are there any suggestions to increase pressure/volume if I'm
still not impressed when it is permanently hooked-up to the house? I
thought of maybe installing an additional captive-air tank where it
enters the house through the garage.My well is 60 ft. deep and though
I am not sure I believe it has a 1/2 hp pump.
Take a look at the performance charts for Goulds pumps on this page
It will help determine what HP pump you need for depth of well and desired
pressure. There's also info on sizing a tank to keep pump run times in the
correct time range http://www.aquascience.net/tanksizing.htm
For more in depth ( pardon the pun) info on submersibles and tanks, see
There are a lot factors that will determine your pressure, volume, velocity,
etc., but in general increasing your pump output and/or the pipe size will
increase your pressure.
Also don't confuse pressure with velocity. You may have sufficient pressure
but the velocity may be low.
360 ft is quite a distance. And depending on if it's traveling up or down,
along with the smoothness of the interior of the pipe, you could be loosing
quite a bit of pressure by the time it reaches the house.
The air-tank in the pump house isn't really helping matters. You're better
off moving the air tank to the house.
The tank has two main purposes, to regulate the pressure, and to extend the
life of the pump. This works in conjunction with a pressure switch.
Ideally the pressure switch should be located close to where the pressure is
needed. In most cases this is near the pressure tank. The pressure switch
has a cut-in and a cut-out setting, when the pressure drops to that set
pressure it will send voltage to the pump (turning on the pump) until the
pressure reaches the other set point, turning the pump off.
Having said all that, if you are in area where freezing may occur, putting
the tank in an unheated pump house may be a concern.
Now if the tank is located near the pump and the pressure switch in the
house, this would be no different than having the tank and the pressure
switch in the house. However, if both the tank and the switch are located
near the pump, the pressure at the house could be less unless the pressure
switch is set to compensate for any pressure loss due to the run from the
pump to the house.
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