Today, many RV plumbing problems can be corrected with less effort. If you have a slow leak in your system, it is generally considered to be a clogged line. To fix this type of leak, you will need to turn off the water supply to the relevant system, walk back to where your leaks are located, replace or add some parts or lines and turn on the water supply again. If you are unsure about doing this type of repair yourself, try a plumber who specializes in RVs.