VIP Sr.: The backup battery will take over and then the system will be running on the backup battery. The TickerValve will automatically close before the backup battery dies. Any wireless sensors on AC power will not be able to detect water, although the wired sensor attached to the VIP Sr. will be able to detect water as long as the backup battery is not dead.
VIP Jr.: Nothing will happen to the TickerValve, if it is open it will stay open, if it is closed it will stay closed. The sensors will not detect water if there is no power on the PipeBurst Pro Jr.