[ztagnation]

I want to construct a concrete water reservoir/tank that has a water level height from the center line of the outlet pipe of 7 feet to the water surface. The water is supposed to deliver to a distance of about hundred feet horizontally-that is from reservoir to my house- but the pipes must pass through to a valley like land-form but the elevation of the prospective concrete tank to my house is more or less the same. I want to deliver that water to my 2nd floor of my house having an elevation of about 10 feet. Is the build-up gravity pressure sufficient to bring the water at this far and this height?

[speedball1]

the elevation of the prospective concrete tank to my house is more or less the same. I

And that one sentence killed your plan. The PSI leaving the tank would be about 3 PSI. With a friction line loss of 100 feet plus the 10 feet of back pressure,(4.34) You'd run out of pressure before you even drew as glass of water.
A more realistic approach would be to install a booster pump and bladder tank at the tank with a check valve just upstream from the pump.
That way you would have constant pressure on demand 24/7.
Sound like a plan? Good luck, Tom

[jlisenbe]

Exactly right. The bottom is this: You can't expect water to run uphill. Since you would seem to be pumping into this concrete structure, why not replace that with a pressure tank. If you are looking for storage volume, go with a couple of large pressure tanks.