4) You will need to have on hand water heater tape, small gas torch, solder, flux, plumbing sandpaper, pipe cutter, gas tape (to seal gas line) and maybe some pipe glue. Ask the sales person at the hardware store for a more defined list.
Examine the washer and replace it with a new one. Also replace screws in water line repair case they are old and damaged too. The new ones you buy should be durable and of good quality.
Plumbers are at a high risk for health problems. This is because they are regularly exposed to many different illnesses and infections. They can contract psittacosis and histoplasmosis from the regular contact they have with animal droppings. Plumbers also see regular exposure to harmful chemicals and elements like lead and the other chemicals that can be found in the plumbing materials they work with on a regular basis.
A plumber becomes a journeyman once they complete their apprenticeship program and they can apply to be licensed. Most of the plumbers today are in the field of journeyman. To get a license to be a journeyman, you need to pass an exam and pay a licensing fee.
As with anything, when you are not sure how to fix a plumbing issue and when you don't have the proper equipment, you should contact a professional. They can usually find out what the problem is and resolve it for you in a short period of time. They will also be able to tell you if you have any other problems and water line repair they can suggest resolutions.
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.
The plumber you hire does not normally do heating but will do hot water heating or in floor heating in the house. Some places you can use the water heater for both domestic hot water and for in floor heating if the heating is a secondary heat. Check with your local plumbing codes on this to be clear.