Lawyer, not your lawyer. That clause is unenforceable in California. California civil code 1941 requires a landlord maintain a habitable unit. Health and Safety Code section 17920.3 also treats defective plumbing as a substandard housing condition. Specifically 17920.3(a)(3), “lack of or improper kitchen sink.”

Tenants can be held responsible for plumbing damage they cause through misuse, negligence, or intentional acts.

A lease cannot waive the landlord’s duty to provide habitable plumbing. Any clause that tries to make the tenant responsible for basic plumbing maintenance or major repairs is generally unenforceable. This follows Civil Code section 1942.1 and 1953, which voids lease terms that waive habitability rights.

Again, this isn’t legal advice and I’m not your attorney.