Locate the problem
One fixture or the whole house?
Where the symptoms appear helps narrow down the problem. A single slow sink often points to a clog in that fixture’s drain or trap. Gurgling from several drains, standing water in a tub or frequent toilet backups can indicate a restriction further along, in the main drain or sewer line.
Common causes include grease, food particles, hair and soap scum, and roots can enter a main line through gaps or cracks. Recognizing the pattern early helps you describe the problem and can keep a small restriction from leading to water damage that needs more extensive repair.
