How to install a pressure tank?

[dr. d]

pressure switches are usually pre-set at the factory, to open at about 20 psi and close at about 40 psi.
you need to install a pressure gauge to find out if the pressures are right. you can install it at either the upper hole of the tank, or beside the pump motor if there is provision for it. most of these thingees are "standard size", meaning, it will fit right the first time.
using the pressure gauge, you can adjust the open and close pressures by turning two screws on the switch...
the pipe from which your pump is sucking from, is usually fitted with a one-way valve, to prevent backflow. if this valve is defective, water from your tank might flow back out.. you can test this by turning off the gate valve of your outlet circuit and wait if the pump automatically switches on after some time or if the tank pressure gradually goes down. (they should not, even if left overnight.)

btw, your tank should have a big air bubble inside when you start at zero pressure. otherwise, if there is a small bubble only, your pump will cycle (turn on and off) rather irritatingly frequently, even if the pressure switch is adjusted correctly. i start mine with an empty tank, to maximize the bubble. it gets smaller over time, so's i have to drain it mebbe 1 - 2 times a year.

oh yes.. i think your tank is connected properly.

good luck.