No connection, but a theoretical customer. Water heaters are a periodic replacement item where the scope of the job is (relatively) fixed. Periodic means enough search volume/demand. Fixed scope means it’s possible to estimate without a site visit.

I can do a water heater in copper in a little over an hour and a half on-site. I might spend more time figuring out which water heater will fit and be best for me and going to pick it up than I will soldering or moving the heaters around.