[AllanJ]

T&P plumbing went back into the plywood covered wall, hit it with the saws-all. Water came out under full main pressure. Quickly shut off the supply to the house, no damage done. Finished removing the tank and opened the wall to investigate. The T&P drain was hard plumbed back into the cold water side.:furious:

Has anyone ever heard of such a configuration and what could be the possible reason to do this?

It was a wrong connection. There is no socially redeeming reason for doing this.