System type: ICS
System is working fine.
No one was home. Neighbor came over. Stated that system is working fine. Asked how he knew that. He stated that owner had passed away and that he takes care of maintenance tasks for the owner's widow. Said that he is familiar with the system and the isolation valves above the tank. Told him that the freeze valve will eventually fail and that he should make sure that it is replaced instead of just isolating the system. He understood the purpose of the freeze valve.