Answer: No, the expansion tank is placed between the safety group and the water heater.
You cannot get rid of the safety group, which is an essential device for your water heater, by protecting it from excess pressure and ensuring its emptying. In addition, it is easy to maintain and change, and its price is not very high. As such, remember that you must change the security group every five years according to the rules in force. You can add an expansion tank to the safety group if you wish, but it cannot replace it. The expansion tank is an additional device which is placed between the safety group and the water heater. It avoids the flow of water caused by the security group, so they are two devices with very distinct functions. You too, send us your brico question