Close Your Pool for Winter

The air is getting cooler, and the kids are back at school.

It’s getting dark earlier, which makes lingering on the deck into the evenings a little less inviting. You threw a jacket on this morning and realized it’s probably time to cover up your pool, too. Sigh!

Interior Pools specializes in pool maintenance, and we’re more than happy to close yours for the season!

However, if you’re keen to do it yourself, here are some tips to ensure it’s done properly (and to make your spring reopening a breeze, because we know you’re already thinking about next season!).


A few days before you plan to close:

  • Add a winterizing algaecide (this will be an extra-strength version).
  • Thoroughly brush and vacuum the interior, and skim any debris off of the surface.
  • Balance your water. Make sure your chemical levels are properly adjusted to prevent staining, scaling, corrosion and calcium buildup over the winter.

Appropriate chemical levels are:
pH: 7.2-7.8
Alkalinity: 80-120 ppm for concrete pools, 125-150 ppm for vinyl-lined or above-ground pools
Calcium (Water Hardness): 175-225 ppm
Interior Pools can test a water sample and recommend chemical adjustments to make sure you’re shutting down your pool with healthy water!

  • Run the filter for 24-48 hours and thoroughly backwash.
  • Turn off your heater.
  • Remove any accessories, such as ladders, slides or diving boards.

On the day of closing:

  • Shock/Superchlorinate to kill any lingering bacteria.


  • Inspect the pool. Check the liner for leaks and tears. Make sure all screws and bolts are tight. Repair any holes with a vinyl patching kit (available at Interior Pools).
  • Lower the water level. Winter levels should be about 6” below the skimmer level. Cover the skimmer with its lid.
  • Drain and remove the pump, the chlorinator (if you have one), and the filter.
  • Detach, drain and store all hoses, and plug the return jet. DON’T plug the skimmer drain! This should be left open.
  • Place an air pillow in the middle of the pool and tightly secure the pool cover on top.
  • Store all accessories, hoses and small parts indoors to ensure no winter damage.


  • Lower the water level. Winter levels should be a an inch or two below the return jets.
  • Rinse your filter and disconnect and thoroughly drain the lines. If you have a multi-port filter, make sure no water is trapped in the valve.
  • Drain your heater, as per manufacturer’s instructions.
  • Disconnect the pump and thoroughly drain the lines.
  • Loosen all quick-connnect fittings on the pump, filter and heater.
  • Remove and safely store all drain plugs.
  • Blow out all lines (you can use a shop vac or a compressor).
  • Turn off all power to the pool equipment (easiest to do this at the circuit breaker)
  • Cover the pool securely with a weather-resistant winter cover or safety cover. If your cover does not have in-ground attachments, secure the edges with half-filled water bags –NOT anything that could blow over or get knocked away, like cinderblocks or planters!).
  • Store all accessories, hoses and small parts indoors to ensure no winter damage.

We know it’s difficult to close up your pool and say goodbye to the summer. Don’t worry! Spring will be here, soon, and Interior Pools will be ready to help you reopen!


In the meantime, enjoy the beautiful Okanagan Fall and winter (or as we call them, the “Hot Tub Months”).

How lucky we are to be able to get the best of each season!