A.O. Smith 110-310-510 – CHECKING FOR A CROSS CONNECTION

1) Turn off cold water supply.
2) Turn on all hot water fixtures.
a. The water should eventually completely drain.
b. If water continues to run, the fixtures and plumbing system needs to be checked.
c. Cold water cross connections may be related to a recirculation pump application, a bad check valve, or missing check valve in the application.