Pumping from a storage tank

[cavscout96]

I have a solar powered well that pumps into a 2100 gallon storage tank.  The well pump is rated at 6gpm.  The tank is 100" tall.

I'm looking to do 2 things

• provide domestic water to a 4BR home and yard irrigation for 1/2 ac
• distribute water to livestock on 50 ac

is the CSV a feasible solution?

my initial thought is storage tank piped to small pressure tank equipped with CSV. 

Can the CSV throttle/meter the gravity-fed water supply from the storage tank to provide 50-60 psi at the house?

Can I branch from my trunk to the house and run 700' of 1" poly (under pressure) to fill another 1200 gallon tank on the other side of my property that will, in turn, gravity fill livestock water troughs?

[Cary Austin]

Is the storage tank really only 100 inches tall?  If so all you will get is 3.6 PSI pressure.  Even if the tank is 100 feet off the ground it would only supply
43 PSI max.  It takes 2.31' to make 1 PSI.  Adding a booster pump that can lift 138' will be the same as 60 PSI.  Then the CSV can make a 20 GPM pump deliver 1 to 20 GPM as needed at that same constant 60 PSI. 

Just pushing 6 GPM through 1" pipe will need 1 PSI for every 100' of pipe.  700' would need at least 7 PSI to get any water out the other end.

[cavscout96]

Yes.  It's just over 8' tall.  It works for the current setup because it's about 40' to the bottom of the hill where we currently water, but the house is at the same elevation as the storage tank.

The proposed additional tank is also around the same elevation.

[cavscout96]

Ok,

Looking at the schematic, the CSV, in this instance, will really protect the booster pump as opposed to the well pump itself.  The well pump is "buffered" from constant on/off by the large storage tank.

PROVIDED that I set my float switch to allow sufficient drawdown of the tank before the well pump kicks on.

Do I have that correct?

[Cary Austin]

Yes you can set it up that way.  You can also set it up with a CSV, tank/switch on the well pump so you could get water directly from the well pump this way if the booster pump failed.

[cavscout96]

Perfect!  Thanks so much.

Last question.  Do you have a jet/booster pump manufacturer and/or source?

[Cary Austin]

There are lots of brands of jet pumps.  Just have to make sure the max pressure the pump can build is at least 10 PSI higher than the pressure switch shut off point.  My favorite for now is still the Goulds, like a J7S, or J10S.  Just google those model numbers and you will find several places and prices to choose from.  All you need from us is the PK1A control kit.

[cavscout96]

Thank you!