Plumbing in San Diego meets salt air, older cottages, and tract slabs that hide a leak until the damage is wide. Supply lines in beach-close houses corrode. Angle stops seize. Water heaters in garages and exterior closets rust at the base while the marine damp keeps the closet from drying. A slab leak in a mesa tract can warm a floor for weeks because the weather never forces you to notice a cold house and a high bill in the same week. Drains in older neighborhoods still include cast iron that scales until a tub or a laundry line gives up.
Fixtures are the clue, not the whole repair. A new faucet on a corroded stub-out fails at the wall. A toilet that rocks on a cottage floor may be sitting on softness, not just a bad seal. Hose bibs and irrigation tie-ins on the outside of stucco walls drip down the plaster and get chased as an interior leak. Pressure problems in hill and canyon pockets are common enough that you should say whether the whole house is weak or only one fixture is. Roots in a lateral show up as a backup in a lower bath while the kitchen seems fine. Know the elevation of the fixture that misbehaves.
The mild climate changes detection, not the need. Pipes do not burst from a hard freeze here, so failures are corrosion, age, slab seepage, and drains. That makes them easier to ignore. Hot water that vanishes, a stain under a heater, or a gurgling drain after you shower are the prompts to stop waiting. If the house was re-piped in some rooms only, say so, because mixed old and new lines fail at the joint between them. Shutoffs that have not moved in years should be named before someone turns them and creates a second leak.
Call and locate the water or the slow drain. Say slab or raised floor, garage heater or closet heater, and whether the house sits in heavy marine air. Mention trees over the sewer path and any fixture that recently changed. Supply, drain, and heater work should not be mashed into one vague complaint.
Call the number on this page.