Tree roots, solidified grease, garbage, sanitary items etc…, the list goes on. 1800tapfix can assess and clear most blocked sewer/stormwater drains, and advise you of TAMS/ICON water responsibility as most Canberra homes are connected to a network. Depending on the age and location of your home, it is wise to have a drainage plan of your site, if you have persistant blocking drains.