There are other skills plumbers need aside from being able to work with water. One of the most common things that a running toilet on is fixing water lines.
Be cautious. If you've just become aware of a problem with water line repair in your home, there are a few steps you should take. First, if there's a lot of water (such as from flooding), you should turn off your electricity to avoid electrocution. Also, don't use your regular household appliances (such as a vacuum cleaner) to remove water. If the water is contaminated (such as from a sewage line), you and your family should leave the home so that you don't get sick. Finally, if the water is from a leak, try to locate the leak's source and turn off the water to prevent further damage.
One other common design that is considered "washerless" was made famous by Delta and copied by several other makers. It uses little "cup" seals that fit over springs recessed in the back of the valve body. The springs press these "seals" against the cartridge and regulate the flow through little tapered openings in the cartridge. If you have one of these and it's dripping, changing these springs and seals will usually correct it. Here's a tip. Once you have the cartridge out of the way, insert a phillips screwdriver into the seal and pop both the seal and spring out. Stick the new ones on the end of the screwdriver to help guide them into place. This is especially helpful if you don't have long slender fingers.
Dishwasher. To check water leakage on your dishwasher, you will need several sheets of paper placed underneath the machine before operating it. When the machine stops, check the sheets of paper you placed underneath to see it they are wet. If so, call a maintenance person to repair the leak immediately. It is important also for you to remember that regular dishwasher uses 15 gallons on every wash load. Make sure that when you use it, the load is full.
The first step in the replacement project is to turn off the water line repair to the toilet and flush any water that may be in the tank. If you forget this step, you will have a giant mess to clean up! You should now disconnect that water line.
There are a lot of different shapes and styles of toilets but, with a few exceptions, they all work about the same. Water is released from the tank (many commercial toilets use a special valve instead of a tank) into the bowl to flush the waste into your drainage piping. Basically pretty simple, right?
A large plumbing job, such as re-piping or installing additional fixtures, may require a permit. Check with your city's department of building and safety before asking for estimates, and avoid any plumbers who are reluctant to comply with regulations.