Annual Plumbing Maintenance Checklist for Lower Mainland Homeowners

Most of the emergency plumbing calls we get in the Lower Mainland trace back to something that could have been caught — and prevented — by a simple 30-minute annual walk-through of the house. Water heaters that fail catastrophically usually showed warning signs for months. Burst pipes during cold snaps almost always happened to pipes that had been vulnerable for years. The checklist below is the one we'd hand to every Lower Mainland homeowner: 30 minutes once a year saves thousands in emergency calls.

Spring (March-April) — recovery from winter, prep for summer

Outdoor hose bibs and irrigation

• Turn on outdoor hose bibs and check for leaks at the wall connection — freezing damage often shows up here once water flows again
• Run each irrigation zone manually and walk the yard — broken heads dump 5–15 gallons per minute
• Inspect the backflow preventer (the device above-ground on the irrigation line) for cracks or corrosion — replace any year it shows damage

Indoor plumbing fixtures

• Test every faucet, including in guest bathrooms — slow drips that started over winter need attention now
• Run hot water at the tap furthest from the heater, time how long it takes to reach hot — if it's longer than last year, there may be scale build-up
• Pour 5 gallons of water down any floor drain (basement, garage) to refresh the trap — prevents sewer-gas backup

Summer (June-July) — water heater + outdoor prep

Water heater service

• Test the T&P relief valve by lifting the lever briefly — water should discharge briefly, then stop when you release. If it doesn't reseat, replace the valve
• Drain 2–3 gallons from the tank drain valve at the bottom — sediment build-up shortens tank life; flushing extends it. If water comes out clear, you're in good shape; if it's brown/sediment-heavy, do a full flush or call us
• Check the anode rod every 3–5 years (more often in hard-water areas) — once it's depleted, the tank starts corroding internally
• Inspect the supply line, the cold-water shut-off valve, and the gas line connection (gas units) for any signs of corrosion or leaks

Sump pump pre-storm-season test

• Pour 5 gallons of water into the sump pit — the primary pump should kick on within 30 seconds and empty the pit
• Listen for unusual sounds (grinding, intermittent humming, vibration) — early bearing failure
• Check the battery on backup pumps — should read 12.5V+ at rest; replace every 4–6 years regardless of usage
• Inspect the discharge line for leaks, kinks, or frost damage from last winter

Fall (September-October) — cold-snap prep

Insulation and exposure check

• Walk the crawlspace and inspect every pipe — water lines in exposed locations need foam insulation tubes (cheap from any hardware store, $5–10 per pipe)
• Check the rim joist insulation around the perimeter of the basement — gaps let cold air at pipes
• Inspect outdoor hose bibs — drain hoses and disconnect them; install frost-free hose-bib covers if you don't have frost-free taps already
• Locate and confirm operation of your main water shut-off valve — turn it half-closed and back open to make sure it isn't seized. If it's seized, replace it BEFORE you need it in an emergency

Sewer mainline check

• If you have trees within 20 feet of your sewer line, consider a preventive camera inspection — fall is when roots are most active and have grown most over the warm season
• Run 5 gallons of water down the lowest drain in the house; watch for slow drainage or gurgling, both early signs of mainline issues
• Locate your outdoor sewer cleanout — make sure the cap is accessible and free of obstruction; we'll need it in an emergency

Whole-house water shut-off prep

Every adult in the house should know where the main water shut-off is and how to operate it. Take 60 seconds, walk to it, demonstrate it, then turn it back on. Mark it visibly. In an emergency, the difference between 'water off in 30 seconds' and 'water off in 5 minutes' is the difference between minor cleanup and a flood.

Winter (December-February) — cold-snap response

Cold-snap pre-emptive steps

• Open under-sink cabinets on exterior walls (kitchen, bathroom) to let warm room air reach the supply lines
• Leave a slow drip running at the tap furthest from the water heater during severe cold — moving water is much harder to freeze
• Keep the house heated to at least 12-15°C even when away — cheaper than a burst-pipe restoration
• If you have a crawlspace, ensure crawlspace vents are seasonally closed (some BC building inspectors disagree; check your local code) or that pipes are wrapped in heat trace where exposed

After a cold snap

• Test every faucet within 24 hours of the temperature returning above freezing — frozen pipes that didn't burst at the freeze point sometimes burst on the thaw
• Walk the basement looking for new water spots — leaks from frozen-then-burst pipes sometimes don't show up until thaw
• Listen for unusual water hammer or running water — a slow leak from a freeze may not be visible yet

Year-round habits that prevent calls

• Never pour grease, cooking oil, or fat down the kitchen drain — collect in a jar, freeze, then trash
• No 'flushable wipes' down toilets — even the ones labelled flushable cause mainline clogs
• Use a strainer in tub and shower drains — hair is the #1 bathroom drain clog cause
• Don't use caustic chemical drain cleaners — they damage pipes and make future drain cleaning harder
• Once a month, run 5 gallons of hot water down any rarely-used drain to keep the trap fresh

When to call for professional service

Annual professional service is worth the cost on:

• Tankless water heater descaling — once per year, mandatory for warranty in most BC water conditions
• Sewer line camera inspection — every 3–5 years for older homes (pre-1980), every 5–10 for newer
• Backflow preventer testing — annual is required by Metro Vancouver for any home with one installed

Frequently asked

Does this checklist really prevent emergencies?

Substantially yes. We track call causes — about 60% of our emergency calls trace to something on this list that wasn't done. Not all emergencies are preventable, but a meaningful portion are.

Can I hire someone to do this for me?

Yes. We offer an annual maintenance service — typically 60–90 minutes on site, covers everything in this checklist, includes water heater flush and sewer cleanout inspection. Call for current pricing.

Got the problem we just described? We answer 24/7 across Surrey, Langley, Vancouver, Burnaby, Coquitlam, Delta, White Rock, and Richmond. Call Mr. Plunger Plumbing & Drainage at (604) 870-1442 — real plumber on the line, exact ETA before dispatch, up-front quote before any work starts.