I recently spoke to a large group of plumbers when the subject of venting a gas-fired water heater came up. I pointed out that many plumbing contractors are still not paying close enough attention to installing the water heater vent connector. The prevailing attitude is it’s not the plumber’s responsibility to evaluate the design of a water heater venting system.
After explaining the design requirements of a proper venting system, one young plumber jumped up and said, “That’s a bunch of crap. Why should I have to worry about the water heater vent connector when it’s the heating contractor’s fault? Let him make the changes.”