Winter Plumbing Tips and Checks: Essential Pre-Season Maintenance for Plumbers
Winter hits different for plumbing work. Frozen pipes, burst water lines, and heating system failures spike between November and February. Most of these emergencies are preventable with solid pre-winter checks. This guide covers what you need to inspect on client properties now, before the cold sets in hard.
Identify Exposed Pipes and Insulate Now
Pipes in unheated spaces freeze first: attics, crawl spaces, exterior walls, and garages. Walk through each property and tag any exposed runs. Water moving through pipes generates heat, but standing water in poorly insulated lines will freeze solid between 24 and 48 hours once temps drop below freezing.
Wrap exposed pipes with foam pipe insulation or heat tape. Pay extra attention to:
- Supply lines running along exterior walls
- Vent stacks and overflow pipes on roofs
- Pipes under sinks near exterior windows
- Water meter connections and main shutoff valves
Heat tape is faster for problem areas and can be thermostat-controlled. It costs more upfront but saves emergency visits. Many clients will approve the cost once you explain a burst pipe repair runs three to five times higher.
Check Exterior Drains and Downspouts
Gutters and downspouts matter more in winter than most plumbers realize. Blocked gutters back water up onto fascia and into walls. Once that water freezes, it creates ice dams that force meltwater back under shingles and into the structure. That water eventually flows down and around foundations, pooling near basement walls where it can freeze and crack concrete.
Clear gutters completely. Make sure downspouts extend at least 4 to 6 feet from the foundation. If a property has a sump pump, verify it's working and that the discharge line isn't frozen or kinked. A frozen sump line defeats the entire system.
Test Shutoff Valves and Locate the Main
A burst pipe is an emergency call. A burst pipe that the homeowner can't shut off fast is a catastrophe. Before winter, test every shutoff valve you can access: under sinks, at toilets, at the water heater, and the main shutoff at the meter. Valves that haven't been used in years often seize. If they won't turn, apply penetrating oil, wait, and try again gently. Don't force it.
Make sure clients know where their main shutoff is and that it works. An emergency service call that could be a quick pipe replacement becomes structural damage if water runs for hours.
Inspect Water Heaters and Heating Systems
Hot water systems work harder in winter. Flush the water heater to remove sediment buildup that reduces efficiency and lifespan. Check the thermostat setting—120°F is standard and safe. Check the pressure relief valve by lifting its handle slightly; you should hear a hiss of air. If nothing happens, it may be stuck and needs replacement.
For properties with radiant floor heating or hydronic systems, check circulator pumps and ensure antifreeze concentrations are correct if the system uses it. A failed pump in mid-January is an expensive emergency.
Clear and Protect Exterior Hose Bibs
Hose bibs freeze solid and split the body from the inside out. Disconnect hoses, drain them, and store them. If a property has frost-free bibs, verify they're draining correctly by opening them in a heated space and checking for water flow. Standard outdoor faucets need either insulated covers or valve boxes packed with straw or foam.
Ice can also build up in buried supply lines if exterior faucets are left open or leaking. A small drip freezes into a plug that blocks water to the whole property.
Check Sump Pits and Basement Drainage
Standing water in sump pits freezes. If a property has poor drainage around the foundation, water pools and freezes against the concrete, expanding and cracking it. Walk the perimeter and look for standing water, poor grading, or downspouts dumping close to the foundation. Correct grading now, before freeze-thaw cycles start.
Document Everything for Your Clients
Walk through your pre-winter checks with clients. Show them what you've done and what they need to monitor. Take photos of shutoff locations and insulated pipes. Give them a simple checklist of things to watch for: slow drains (sign of freezing), unusual noises from pipes, or water pressure drops.
This approach reduces winter emergency calls, builds trust, and positions you as someone who prevents problems rather than just fixing them.
Flint handles job scheduling, client notes, and service history for plumbers and electricians in seconds—try it free at ask-flint.com.