As opposed to other types of home maintenance and repairs, plumbing is probably one of the easier topics and a lot safer than say electrical repairs. It is not that difficult for homeowners to learn the basics of plumbing in order to carry out different needed repairs. Most plumbing systems do not need too much maintenance, though aspects like ones water heater should have some maintenance and safety checks done at least once a year. We will soon have some articles on what these tasks are.
For today, here are some good resources that will help with learning more about working with ones water heating and plumbing systems at home.
The diynetwork.com has good tutorials here.
Homerepair.about.com and home.howstuffworks.com are ok if you can weed through their websites – they are a little busy.