no you haven't. Even if I know something, I still learn, I never seem to know it all.
Does anyone know of a reliable, reasonably priced plumber?
Wish I knew how to do multiple quotes. I can answer most any question you have and will even be able to tell you if your being quoted a reasonable price. We have been slammed silly for over the past six months so if it was an emergency type thing I would be of little help.
Draining your water heater (meaning shutting the water, gas/electric off and letting all the water out) is old news and very wasteful. It is quicker and better to simply hook up the hose to the drain valve and open it up. Let it run full blast for about 2-3 minutes. The pressure will force all the sediment and garbage that can fit through the opening out; it's all sitting on the bottom anyway. I've changed out dozens upon dozens and after draining them the sediment is still sitting there in the bottom. One problem one might encounter is that the valve will then not completely seal back so be prepared to install a cap. Most w/h drains are plastic and even with the brass ones on quality w/hs only one brand comes with a 1/4 turn ball valve type. This of course is not needed if your house is equipped with a water softner
Tankless w/h can be great and can save you money depending on how the hot water is used. I have no experience with electric ones because I've never heard a good thing about them. You would need a lot of free space in your electrical panel and it makes your electric meeter spin like a top! Gas ones have a good chance of working with the current gas pipe size but if you were to run all your gas appliances at one time there is a good chance you would "starve" the w/h. Usually you would want to upsize the gas system which then makes it not that affordable. A good home inspector would catch this at a time of sale too. Well I've said to much.......
Singletary, our plumber is second generation, his son is third. He is also a cattleman. What I like is that they are honest and there is non of that messing around with pricing. Saying one thing then saying oh, it is not what I thought it is going to cost more. They are usually very reasonable for the work they have done for us and are PORA approved. In Sun City & Sun City West they have PORA, you have to have a good record to get their approval to in in SC & SCW.
A lot of people never heard of maintenance on a water heater, just get a new one. It is old hat, for a few people.