Your first steps with a plumbing problem
Report the problem to your landlord in writing right away, take photos, and keep copies — and for anything serious, like no water or an active leak, treat it as urgent and use any emergency-maintenance line.
A written report, such as a text or email you save, records when the landlord was notified, which matters if the repair drags on. Describe the problem, photograph it, and note the date. If a fixture is leaking, shutting off the water to it can limit damage while you wait for help.
Avoid attempting major plumbing repairs yourself, since that can make things worse or give the landlord a reason to blame you. Keep your reports and any responses. If your landlord ignores a plumbing problem after you have reported it, a free review can help you decide what to do next.
This is general information about California tenant rights, not legal advice. Every situation is different.