A burst pipe discovered in May — after sitting frozen and then thawed for months — can mean tens of thousands in water damage. The good news: a proper winterization in the fall takes two to three hours and costs almost nothing if you do it yourself.
Step 1: Shut Off the Water Supply
Turn off the main supply — either at the pump or at the curb stop. Open all taps to begin draining pressure from the lines.
Step 2: Drain the Water Heater
Turn off the heater (gas or electric) before draining. Connect a hose to the drain valve and run it outside or to a floor drain. Let it drain completely.
Step 3: Blow Out the Lines
This is the most important step. Using an air compressor, blow out each line from the farthest point back toward the main. Start with hot water lines, then cold. Use low pressure (30–50 PSI max) to avoid damaging valves.
Step 4: Add RV Antifreeze to Traps
Pour RV-grade (non-toxic) antifreeze into every drain trap: sinks, tubs, showers, and floor drains. Also pour it into the toilet bowl and tank after flushing and sponging out as much water as possible.
Step 5: Disconnect and Drain the Pump
Remove the pump from the water source if possible. If not, drain and disconnect the inlet and outlet lines. Leave valves open so any residual water can expand without pressure.
Step 6: Disconnect the Water Softener and Filters
These hold water and will be damaged by freezing. Drain, bypass, and store them in a heated space if possible.
What People Miss
- Outdoor hose bibs — disconnect hoses and open the bib fully to drain
- Ice maker lines on the fridge
- Hot tub and pool equipment
- Water lines to a detached garage or bunkie
If you'd rather have a pro handle it, we do fall cottage closings throughout Parry Sound and Muskoka. One call, two hours, no burst pipes in spring.