Clearing Blocked Pipes & Drains
Internal waste pipes can easily become blocked over time with hair grease kitchen waste etc http://www.simplifydiy.com/plumbing-and-heating/mains-water-systems/clearing-pipes
Repairing & Replacing Pipework
The ability to make minor plumbing repairs can really pay off in an emergency http://www.simplifydiy.com/plumbing-and-heating/plumbing-repairs
Replacing A Cold Water Storage Tank
A primary component of an indirect gravity fed plumbing system is a cold water storage tank or cistern http://www.simplifydiy.com/plumbing-and-heating/cold-water-tank