1.   Over many years, the pipes had got clogged up with grease.

2.   And biofilms also cause problems outside the body, corroding ships and clogging pipes.

3.   For instance, it says distributors have called Tide an ineffective detergent that forms sludge that clogs drain pipes and causes washing machines to rust.

4.   In addition, the weeds clog cooling pipes for the transformers at the Owen Falls power plant, causing frequent blackouts.

5.   In those two water bodies, the European zebra mussel, for one, has multiplied, clogging pipes at municipal water and power plants and fouling ships.

6.   The rain collected on the roof of the Victory Boulevard store because the drain pipes were clogged, said Chief Dave Starr of the Burbank Fire Department.

7.   World Wide Web pages take forever to load because data pipes are clogged.