Location of pressure tank for long well to house run

[Mark Meister]

Hello,

I recently had new well drilled on my 35 acre property. We're looking to build a home around 800' away. I'm looking into installing the pump system myself and was wondering were would be the ideal location for the pressure tank system?

I've thought about building an underground tank housing near the pump to keep things from freezing up but am wondering will the pressure tank keep the line to the house under enough pressure with an 800' run to the house?

The well is around 300' deep and will be installing a submersible pump. FYI

 

[Reach4]

The tank will need to be with the pressure switch. Will the power go from the house to the pressure switch? If so, I would lean toward having the pressure switch and tank at the house. If the pump will have its own power service, that can factor into the decision.

If the tank and switch are at the house, the pressure drop from the flow from the well to the house will be canceled out. So if the switch and tank are at the well, you might need bigger pipe for the run to the house.

The run would usually be done with SIDR poly pipe.

There are tanks designed to be buried. I think there are pressure switches appropriate for that, but am not up on what is available in that regard. I am not a pro.

 

[Sponsor]

 

[Mark Meister]

The pump and house have separate power sources so no running power to/from.

 

[Reach4]

So probably have the pressure tank and switch in the pump house. Use polyiso insulation and electric heat to prevent freezing. You might as well put in some outlets in and out of the pump house. You can have a yard hydrant or two on the path for yard water.

http://www.pressure-drop.com/Online-Calculator/ is a nice pressure drop calculator. It is a little complex at first. In addition to the pressure drop through the pipe, there is pressure drop from any vertical increase in altitude. I would maybe try to limit the pressure drop due to flow to 3 psi at 10 gpm. Less pressure drop is nicer. Pressure drop before the pressure switch and tank is less critical.

https://www.menards.com/main/search.html?sf_categoryHierarchy=&search=sidr
You would normally want 160 psi pipe unless something higher is called for. You connect with barbed "insert" fittings, and clamp with two worm gear clamps at the end of each piece.

You should take into account thermal effects, which is mainly not pulling the pipe tight, but rather snaking in somewhat.
http://www.charlottepipe.com/Documents/PL_Tech_Man/ExpansionandContraction.pdf
https://www.huduser.gov/portal/publications/pex_design_guide.pdf

 

[Valveman]

Only the elevation matters. As long as it is flat for 800', friction loss is your only concern. This just means using 1.5" or 2" pipe, so there is basically no friction loss at like 10 GPM, which is the max flow for most houses. I have one home 1000' from the well, and another place 3,500' from the well. With large pipe I have the same pressure at both ends. Even 40 PSI will push that distance easily. But you might want to use a 50/70 pressure switch and set a CSV to maintain a constant 60 PSI to the house. At that pressure I would use the CSV1A with a 10 gallon size tank, which is easy to put under a fake insulated rock or something.