I have a phase 111 hot water tank with a stainless steel liner hooked up to my smith oil furnace. I have been having low hot water flow for a while and was wondering if anyone had this same hot water problem and a possible fix. It is 20 years old and I have a well. My thoughts are that the dip tube could be clogged or I have a large build up of scale on bottom of tank. This tank does not have a bottom drain but in the diagram shows a cold water inlet siphon to drain the tank. Mine has nothing installed and has never been drained. Could this be clogged so bad it is restricting the flow??

Today, this is the common problem everywhere. Your problem is same as that of my friend. He was also going through poor hot water flow through his tank. Even after contacting to several plumbers he wasn't able to fix his slow hot water flow. Later on, he came in contact with Walk in bathtub Mesa professionals who provides plumbing services and are able to fix any kind of obstacle. I think you should go on with the professionals to get your hot water flow in control.