Closing a cottage for winter is mostly a plumbing job. What you do with the water decides whether spring opening is a pleasant weekend or an insurance claim. From a lake cabin in the Kawarthas to a chalet in the Laurentians, a Gulf Islands cottage or a Prairie lakeside place that sees minus forty in January, the logic is the same: get the water out, keep the traps from freezing, and use the quiet season to fix what annoyed you all summer.
When to close: a planning timeline
Most cottages across Canada get closed between Thanksgiving and early November, but the forecast matters more than the calendar. The trigger is the first sustained stretch of nights below freezing, which lands anywhere from late September in northern Saskatchewan or the Yukon to mid-November on the south coast of British Columbia. A cottage that stays heated through the winter follows a different playbook, so this guide assumes a full shutdown.
- Six to eight weeks out: walk the cottage and note every drip, slow drain, wobbly toilet and faucet that needs two hands to shut off. Order replacement parts and fixtures now, because delivery to rural addresses can take longer once the snow flies.
- Two to three weeks out: replace anything that leaks or is on its last legs. A cracked fill valve is far easier to change on a warm September afternoon than on opening weekend in a cold, empty cottage.
- Closing weekend: drain, blow out, protect the traps, shut off. Then walk it again.
Step one: shut off and drain the supply side
Start at the source. Turn off the pump or, on a municipal or community system, the main shutoff. Open the lowest drain point on the system (usually a boiler drain near the pressure tank), then open every faucet in the cottage from the highest down. That lets air in from above so the water actually leaves the lines instead of sitting in a vacuum.
Things people forget on the supply side:
- The hot water tank. Shut off power or gas, then drain it fully. A tank left half full is one of the most common freeze failures in seasonal properties.
- Outdoor hose bibs, dock lines, filters, softeners, UV housings and appliance supply lines. Disconnect, drain and leave open.
- Pull-down kitchen faucets. The hose and spray head hold water. Pull the head out, let it drain and leave it hanging over the sink.
Where the water line runs a long way from the lake or a well, many owners use a small air compressor to blow out the lines after gravity draining. Keep the pressure modest and blow each branch until the faucet spits nothing but air. Shower valves deserve special attention: the cartridge inside a pressure-balancing or thermostatic valve can trap water, so cycle it through hot and cold with the shower head open while the air is running.
Step two: protect the drain side
Once the supply is dry, the traps under every sink, tub and shower still hold water by design. That water freezes, expands and splits the trap. The standard fix is plumbing antifreeze (the pink, non-toxic propylene glycol product sold for RVs and cottages, never automotive antifreeze) poured into each drain until the trap water is displaced. Go through the whole list: kitchen sink, prep sink, every bathroom sink, tub, shower base drain, laundry sink, floor drains and the washing machine standpipe.
Toilets get the same treatment. Shut the supply, flush, sponge or shop-vac the tank dry, remove as much water from the bowl as you can, then add antifreeze to the bowl. A cracked bowl in spring means a whole new toilet.
Fixtures that fail in seasonal properties
Cottage plumbing sits idle for months, sees dramatic temperature swings, and often runs on lake or well water that is harder and siltier than municipal supply. A few patterns show up again and again.
| Fixture | Common cottage failure | What to look for when replacing |
|---|---|---|
| Toilet | Cracked bowls from residual water; flappers stuck after months idle | Simple gravity flush, easy-to-source parts, a skirted or one-piece design that is easier to sponge dry |
| Kitchen faucet | Seized cartridges, split spray hoses, scale on aerators | Ceramic disc cartridge, braided metal hose, tool-free aerator |
| Shower valve | Cartridge damage from trapped water, stiff handles | Pressure-balancing valve with a widely available cartridge |
Upgrades worth planning during the closed season
Closing weekend is not the time to renovate, but it is the best time to decide what changes before next summer, while the list of what failed is fresh.
- Toilets. A modern gravity-flush toilet from TOTO, Kohler or Duravit is a low-risk upgrade. Look for CSA or cUPC certification and keep the mechanism simple: smart toilets and bidet seats are wonderful in a year-round home but add electronics and extra water lines that must be drained in a seasonal property. Browse the toilets collection with serviceability in mind.
- Kitchen faucets. A pull-down faucet with a ceramic cartridge and a metal hose handles lake water and long idle periods far better than a bargain faucet. The pull-down faucet collection covers brands like Riobel, Kalia and Blanco that are well established in Canadian kitchens.
- Shower valves. Cottages often still have the original valve from whenever the bathroom was built. Replacing rough-in and trim together from the shower valve collection gets you a pressure-balancing valve with a cartridge you can still buy in ten years.
- Grab bars. Cottages get used by every generation of the family. A properly anchored bar from the grab bar collection is a small job with an outsized benefit.
Ship to the cottage or to your city address, whichever is easier to receive; shipping is available Canada-wide. If a local plumber is handling the spring install, they may qualify for the trade program.
Code and certification, the Canadian way
Plumbing in Canada falls under the National Plumbing Code as adopted and amended by each province and territory, and seasonal properties pick up additional rules from local health units around septic systems and lake intakes. Fixtures should carry CSA or cUPC certification. Beyond that, defer to your local code and your local plumber: standard practice for a lake intake in Ontario differs from a drilled well in Nova Scotia or a cistern in rural Alberta.
The closing-day walkthrough
- Pump or main shut off; pressure tank and hot water tank drained.
- Every faucet open; lines blown out; shower valves cycled hot and cold.
- Antifreeze in every trap, floor drain and standpipe; toilets sponged dry and bowls protected.
- Appliances disconnected; filters drained; hoses off the outdoor bibs.
- A photographed list of what needs replacing before you lock the door.
For help choosing fixtures that hold up in Canadian homes, the Vatero buying guides cover toilets, faucets, showers and sinks in depth.
Frequently asked questions
Do I really need antifreeze if I drained everything?
Yes. Draining empties the supply lines, but the traps under sinks, tubs and showers hold water by design so sewer gas cannot enter the cottage. That water will freeze. Non-toxic plumbing antifreeze in every trap is cheap insurance against a split trap or a cracked toilet bowl.
Can I leave a smart toilet or bidet seat in a seasonal cottage?
You can, but it adds work. Electronic seats have internal water lines, heaters and valves that must be drained according to the manufacturer's instructions, and many are not rated for storage below freezing. For a cottage that is fully shut down, a simple gravity-flush toilet is the lower-risk choice.
What pressure should I use to blow out cottage water lines?
Keep it low and check your fixture manufacturer's guidance. Household fixtures and PEX or copper lines are designed for normal domestic water pressure, and there is no benefit to exceeding it with air. Short bursts, one branch at a time, until each outlet runs dry.
