Low tank pressure is the most common reason why the VistaPure will stop dispensing water from the wand or faucet. The water-storage tank contains an air bladder that must be pressurized to between 6.5-7.5 psi for proper operation. Here are instructions for checking the air pressure in the tank and adding air pressure, if necessary.
If the air pressure in the tank meets the required psi, but you're still experience low or no flow from the VistaPure Wand or Faucet, you might need to clean the automatic shut-off valve. Over time, it's possible that debris from the city water supply may clog this element if the system.