Most of the work here is looking, not fixing. The point is to notice a damp crawlspace, a dripping valve or a slowing drain before it becomes a leak or backup. Anything beyond simple checks belongs with a licensed plumber.

Southern California winters are mild, so this calendar is built around the seasons that matter locally: the rainy months, when trees push roots and groundwater rises, and the hot months, when water use climbs.

Through the year

January
Walk the crawlspace or basement with a flashlight after the first rains; look for damp soil, stains and drips under drain lines.
February
Run water in rarely used fixtures, floor drains and guest baths to keep traps full.
March
Check exposed galvanized joints for weeping or fresh rust; update your symptom log.
April
Look at the water heater: strapping secure, no rust at the base, no water in the pan.
May
Check hose bibs and outdoor lines before heavy garden watering begins.
June
Review your shutoff map and confirm everyone in the household knows the main valve.
July
Watch drain speed during heavy summer use and note any slowdowns.
August
Look under every sink for drips, loose traps and corroded supply stops.
September
If roots have caused backups before, consider scheduling a camera inspection or line maintenance before the rainy season.
October
Check the area along the sewer route for soggy patches or unusually green grass.
November
Confirm gas appliance connectors look intact and that CO alarms work.
December
Review the year's log and decide which repairs to plan for next year.

Quick monthly glance

  • No new stains on ceilings or walls below bathrooms
  • No drips under sinks
  • Toilets not running between flushes
  • Drains clearing at their usual speed
  • No sewer odor in rooms or the crawlspace

Owner checks versus plumber tasks

Reasonable for owners

  • Check for leaks, stains and damp areas
  • Refilling dry traps
  • Cleaning aerators and showerheads
  • Keeping a symptom log and shutoff map

Better left to a licensed plumber

  • Replacing valves and supply pipe
  • Clearing main sewer lines
  • Gas line or water heater work
  • Camera inspections and drain repairs

Common questions

Should I flush my water heater?

Periodic flushing can reduce sediment, but old drain valves can leak once opened. If the tank has never been flushed, ask a plumber first.

How often should an old sewer line be inspected?

There is no single schedule. Lines with a history of roots or backups benefit from closer attention; a camera inspection helps set a sensible plan.

Is crawlspace inspection safe?

Wear gloves and eye protection, watch for sharp debris, and stay out if there is standing sewage or exposed wiring near water.

General information for Downtown Fullerton, not a quote or professional advice. In an emergency, call 911.