On Jun 17, 7:51 pm, "john"
wrote:
Proper and only way to do it right.
1. shut off pump.
2. Open a valve (preferably near the same level as the tank) until
water stops flowing.
3. Shut valve and check the pressure. You seem to have it set now at
40-60 (within reason) so the pre-charge should be 38 or 2 psi below
the cut-in pressure.

I use the same gauge thats on the water tank for the reading right?

and is it possible to check the pressure with a seperate gauge that attaches
to the air valve at the top of the tank?

My tank (thats in the initial post picture) is only about 5 feet high. Im
guessing its the tank then... crap..

I am on dialup so didn't check the picture at first. That looks like
a new installation. The tank looks plenty large to do a reasonable
watering job (2-3 heads at least).

Yes, normally use the same gauge as there is some variance in the
usual ones. You can check it either by the one on the tank or by the
fitting on top but the process is the same in either case.

If you do decide that you need more storeage, you can add another tank
working in conjunction with the one you have. It would just tee off
of the pipe leading in/out of your current tank.

Harry K