This is the first time Ive run across one of these, appears to be from the 1950’s.
What is it?
Cabinet water heater. We still run across them occasionally. Never been able to find one with a TPR. Usually, it is hidden inside a cabinet, in the corner, nailed shut and a homeowner who did not know it was even there.
Yep they still sell them here, Valve is inside the cabinet.
yep, very limited access.
After looking closer at the data plate I’ll change to age to 1975.