pin hole leak in a 3/4 hot return line. squirting a fine hole into the storage room on the other side of the wall.
21 unit building and had it cut and pressed without them even knowing the hot water was off.
called them to tell them it was fixed and they asked when i did it
the hot return blew a pin hole through the drywall and into their storage room.
finished in a matter of a couple minutes without waiting for the water to drain. note that i date this stuff to be able to see the life of the fittings.
i had to reach around the heater and vent pipe.
same heater from a year ago.
cleaned up pretty well and notice the date code there.