Complete Pool Closing Checklist

Summer is coming to an end in St Louis – Do you know how to close and winterize your pool?

If you’re like most people, you dread having to close your pool. Unfortunately, if it’s not winterized correctly, it may mean a green, murky mess when you open it again next summer.

This checklist will help you keep your pool in top shape. Don’t skip any steps!

Balance the Water Chemistry

About a week before pool closing, take the time to check your pool water’s chemical levels.

  • Your PH should be between 7.2 and 7.8
  • Your alkalinity should be between 80 and 120 ppm
  • Your calcium hardness should be between 180 and 220 ppm

Once these levels are all correct, sanitize the water with a shock agent then wait for the chlorine level to fall back to a desired range.

Get Everything Out of the Pool

Next, remove the ladder, any baskets, or any other accessories that are normally in the pool.

From here, you’ll want to remove all the debris that is in the water or the bottom of the pool. Vacuum the floor, surface scrub the walls and generally ensure your pool is clean.

Lower the Water

Now is the time to get the filter pump going and start lowering the water. You’ll want to lower it until it is a few inches below any tile along the edge or return lines.

You can skip this step all together if your pool is lined with vinyl.

Drain the Pump and Filter

Now you can drain the pump, filter and any chlorinator or heater you have. If you forget this step, winter will be hard on the equipment. Freezing and cracking can occur if even a little water remains.

If you have an in-ground pool, the plumbing lines will also need to be blown out. Once they are empty, place plugs at the end of the lines.


Next, add a winterizing chemical kit to the water. This will help keep the green stuff, along with rust and other bad things out of your pool! Make sure to follow the instructions on the kit that you get.

Secure the Cover

Lastly, secure your cover over the pool. Make sure it fits tightly. If there are any holes or damage in the surface material, debris may be able to enter your clean pool.

Make sure to secure it tight for the winter and then relax, because you are done!

If you have any questions or need help closing your pool, contact us today and we will be glad to help!

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