Bestcleanerproducts.com is reader-supported. When you buy through links on our site, we may earn an affiliate commission. Learn more

How to Close an Inground Pool for Winter

by 
Jennifer Davis
  Jul 10, 2023 6:55 PM
Prime for Young Adults: check your eligibility on Amazon

Crisp morning air drops the first batch of dry leaves across the surface, and the water suddenly feels far too cold for an afternoon swim. Shutting down an inground pool means cleaning the basin, balancing the water chemistry, and blowing out the plumbing lines so trapped water cannot freeze and crack underground pipes. Once the pump, filter, and heater drain completely, installing a tight cover locks everything down safely until spring.

A few local details shape the exact routine. Freezing northern winters demand thoroughly cleared pipes sealed with rubber plugs, while milder southern areas need far less plumbing prep. Pool surfaces change the plan as well, because vinyl liners need enough water weight to avoid wrinkling or shifting. Solid covers also collect heavy rainwater that must be pumped off, unlike porous mesh covers. Here is how to handle each task so your pool stays safe all winter.

1
Pool Waterfall Fountains for Inground Pools Above Ground Pools, Swimming Pool Accessories Sprinklers Chiller for Cooling Temperatures, Summer Pool Pond Water Aerator Sprayer for Garden Decor (1 Pack)
Pool Waterfall Fountains for Inground Pools Above Ground Pools, Swimming
View on Amazon
2
HTH 67084 Swimming Pool Care Algae Guard Advanced, Swimming Pool Chemical, Fast-Acting, 32 fl oz
HTH 67084 Swimming Pool Care Algae Guard Advanced, Swimming Pool
View on Amazon
3
In The Swim Pool Deluxe Opening Chemical Start Up Kit - Above Ground and In-Ground Swimming Pools - Up to 15,000
In The Swim Pool Deluxe Opening Chemical Start Up Kit
View on Amazon
4
Doheny's Ultimate Pool Winterizing and Closing Chemical Kit | A Convenient Package Containing All of The Pro-Grade Chemicals You Need to Winterize Your Pool | for Pools Up to 35,000 Gallons
Doheny's Ultimate Pool Winterizing and Closing Chemical Kit | A
View on Amazon
5
Rx Clear Winter Closing Kit | Non-Chlorine Winterizing Chemicals for Above or In Ground Swimming Pools | Open to a Crystal Clear Pool in The Spring | Up to 20,000 Gallons
Rx Clear Winter Closing Kit | Non-Chlorine Winterizing Chemicals for
View on Amazon
6
Champion Pool Shock - Ready to Use Liquid Chlorine - Commercial Grade 12.5% Concentrated Strength - 4 Gallon
Champion Pool Shock - Ready to Use Liquid Chlorine -
View on Amazon
  • VC Score

    BCP Score is a ranking system developed by bestcleanerproducts.com. BCP Score has no relationship or impact from any manufacturers or sales agent websites. Learn more

    9.0
  • Brand
    CPDI
7
Aquatix Pro Pool Winterizing Plug Premium 1.5" to 2" Swimming Pool Winter Expansion Plugs with SS Screw, Stainless Steel Bolts, Heavy Duty Rubber, Protect Your Equipment Today!
Aquatix Pro Pool Winterizing Plug Premium 1.5" to 2" Swimming
View on Amazon
8
HTH 52038 Swimming Pool Care Green to Blue, Advanced Shock System, 2-Step Swimming Pool Care Solution, 1 Kit
HTH 52038 Swimming Pool Care Green to Blue, Advanced Shock
View on Amazon
  • VC Score

    BCP Score is a ranking system developed by bestcleanerproducts.com. BCP Score has no relationship or impact from any manufacturers or sales agent websites. Learn more

    8.2
  • Brand
    HTH

Last update on 2023-07-10 / Affiliate links / Images, Product Titles, and Product Highlights from Amazon Product Advertising API

1. Preparing for the Pool Closing Process

The process of learning how to close an inground pool starts long before you actually begin. Preparation is key to a successful pool closing. The first step is to gather all the necessary supplies, including a pool cover, winterizing chemicals, and plugs for your pool's skimmers and return jets. Also, be sure to check the forecast and pick a day that is dry and ideally not too windy.

Clean your pool thoroughly. Any leaves, dirt, or debris left in the pool can cause staining and create a mess that's hard to clean up in the spring. Using a pool vacuum or robotic cleaner can make this task easier.

Next, test your pool's water to ensure it's properly balanced. This step is vital, as an imbalance can lead to corrosion or scaling over the winter. Your pH levels should be between 7.2 and 7.6, alkalinity between 80 and 120 ppm, and calcium hardness between 180 and 220 ppm.

Finally, lower the water level in your pool. The correct level to lower to will depend on your climate. In areas where freezing is common, the water level should be 4-6 inches below the pool's skimmer.

2. Adding Winterizing Chemicals

The next step in how to close an inground pool is to add winterizing chemicals. These help protect your pool's water quality over the winter and make reopening in the spring easier.

The chemicals needed will vary depending on your pool's specifics, but typically, you'll need a winterizing pool chemical kit, which includes algaecide and shock treatment.

First, add the shock treatment, following the manufacturer's instructions. Shock helps to kill off any remaining bacteria or algae in the water. Be sure to wait for the chlorine levels to return to normal before proceeding to the next step.

Then, add the algaecide to prevent algae growth over the winter. Once again, follow the manufacturer's instructions for the correct dosage.

Remember, when handling chemicals, always wear appropriate safety gear, such as gloves and eye protection.

3. Securing Your Pool's Equipment

Protecting your pool's equipment is a crucial step in how to close an inground pool. This includes your pump, filter, heater, and any other auxiliary equipment.

Start by backwashing your filter. If you have a cartridge filter, remove and clean the cartridge with a product like the bestway filter cleaner.

In The Swim Pool Deluxe Opening Chemical Start Up Kit - Above Ground and In-Ground Swimming Pools - Up to 15,000
View on Amazon

Then, disconnect your pump and filter. Drain all the water out of them and store them in a dry, safe place for the winter.

For the heater, make sure it's turned off and all the water is drained out. If possible, cover it to protect it from the elements.

Finally, plug your pool's skimmers and return jets to prevent water from getting into the lines and freezing.

4. Installing the Pool Cover

The last step in how to close an inground pool is installing the pool cover. A good pool cover protects your pool from debris, helps maintain water quality, and can also provide a safety barrier.

Start by inflating any air pillows and placing them in the pool. These help to absorb pressure from ice and can prevent damage to your pool walls.

Then, place the pool cover over the pool, ensuring it covers the entire surface area. Secure the cover using water bags or winter cover clips. Make sure the cover is tight and secure to prevent wind from getting under it and causing damage.

Finally, regularly check on your pool over the winter to ensure the cover is still secure and to remove any accumulated snow or water. A pool cover pump can be useful for this.

With these steps completed, you can rest easy knowing your pool is properly closed for the winter and will be ready for a smooth opening in the spring.

People also read:

5
1 ratings
Jennifer Davis
WRITTEN BY
Jennifer Davis
Jennifer is a 45-year-old interior organizer and cleaning pro from Georgia. Drawing from her background in upscale home services, she evaluates premium vacuums and bathroom cleaners. Her expert tips on deep cleaning and odor elimination make her reviews essential for achieving that fresh, sparkling finish.