Tank pre-charge pressure
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Check the tank pre-charge pressure

It is recommended to check the tank pre-charge pressure periodically while the system is operating
and add air if necessary.

Checking the pressure of the domestic water expansion tank (hydrophor):

  1. close the water supply to the house/apartment
  2. open the hot water tap
  3. wait until no more water comes on (tap remains open)
  4. measure the pressure of the domestic water expansion tank (hydrophor), it should be equal to cold water supply pressure - ask service provider
  5. if less, pump up. The valve on the tank is a normal car tire valve. Water may come out of the tap during pumping
  6. when the water no longer comes out of the tap and the tank pressure is achieved,
    close the hot water tap and open the water supply to the house/apartment.

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