There are other skills plumbers need aside from being able to work with water. One of the most common things that a water heater on is fixing water lines.
The wax ring is used to seal the drain outlet on the bottom of the toilet to the drain opening in the floor. When a toilet is installed, the ring is placed onto the drain... the toilet is dropped onto the ring... and the toilet bolts (also known as closet bolts) are tightened enough to lock the toilet in place. If that wax gasket ring starts to fail or isn't seated properly? Sewer gasses can sneak out from under your toilet causing your bathroom to have that suspicious smell. It can also cause water line repair to escape, sometimes invisibly, with each flush potentially damaging the floor hidden under the toilet.
This so impressed me, that I thought, here is the man who might fix my sink problem, and I told him about my kitchen sink. The look on his face was priceless, as he said, "Ridiculous! Sinks don't leak if they're new." He even showed me what to do. He took out a big heavy-duty screwdriver with a big flat-head blade and showed me. "This is what's probably lose." He put the blade of the screwdriver in a notch the size of a giant screw head that was right in the center of the drain basket where the plug sat in.
Blisters in asphalt or felt roofs only need to be treated if they contain water or have caused the roof covering to leak. Press the blister to check if moisture is expelled. If so, it must be sealed with a patch.
18. When using an electronic chart plotter do not use the waypoints at the harbour entrances. Anticipate the direction from which you will be approaching and chose a waypoint which will help you to water line repair eyeball your way in.
The work area should always be clean and free of trash and clutter. The cleaner and less clutter there is in a Plumbers' work area, the better able a plumber will be to make sure that his job goes as smoothly as possible.
Windshield repair techs come and go on a daily basis. The majority struggle to survive. Most fail. It's not that they're not good at what they do, it's not that they don't have the skills, it's not that they're not willing to work hard, it's their lack of MARKETING Training. That's the bottom line: It all comes down to proper marketing strategies.