And a properly sized thermal expansion tank, at that. A 1000 gallon heater is not something that can be served by a standard expansion tank. Or, if the expansion tank is of the proper size, has the bladder failed?
Lake County, Florida plumber
Springtime Plumbing Services
Good call, guys. I assumed that a 1,000 gallon tank in a commercial setting would have temp and pressure gauges in the proper locations to make thermal expansion and easy issue to rule out of the equation.