How To Winterize A Swimming Pool

Why Winterizing a Swimming Pool is Important

Winterizing your swimming pool is an essential step in protecting it from potential damage caused by freezing temperatures. By properly winterizing your pool, you can prevent costly repairs and extend the lifespan of the pool. In this article, we will guide you through the process of winterizing your swimming pool.

Prevents Damage from Freezing Temperatures

Freezing temperatures can cause significant damage to a swimming pool if not properly prepared for winter. When water freezes, it expands and puts pressure on the walls and pipes of the pool, leading to cracks or burst pipes. Winterization helps safeguard against these damages.

Saves Money on Repairs and Maintenance

By taking the time to winterize your swimming pool, you can save money on potential repairs that may arise due to freeze damage during colder months. Repairing cracked walls or burst pipes can be expensive, so investing in proper winterization measures is a cost-effective choice.

Extends Lifespan of the Pool

Winterizing your swimming pool also contributes to extending its overall lifespan. By protecting it from freeze damage and other potential issues that may occur during harsh weather conditions, you ensure that your investment lasts longer and provides enjoyment for years to come.

Gather the Necessary Supplies

Before starting with the actual process of winterization, gather all necessary supplies:

  1. Pool cover: A durable cover specifically designed for winter use.
  2. Winterizing chemicals: Chemicals recommended by manufacturers for closing pools.
  3. Pool brush and vacuum: Essential tools for cleaning before closing.
  4. Skimmer plugs: Plugs used to seal skimmers’ openings.
  5. Air compressor or shop vac: For blowing out plumbing lines.
    6 .Pool water test kit: To test water chemistry levels before adding chemicals.

Clean the Pool

To prepare your swimming pool for closure:

1.Remove any debris floating on top using a pool net.
2. Brush and vacuum the walls and floor of the pool to remove any dirt or algae.
3. Backwash the filter to ensure it is clean and ready for winter.

Balance the Pool Water

It’s crucial to balance your pool water before closing it:

  1. Test the water chemistry using a reliable test kit.
  2. Adjust pH, alkalinity, and calcium hardness levels if necessary according to manufacturer guidelines.
  3. Add winterizing chemicals in appropriate quantities as recommended by manufacturers.

Lower the Water Level

To lower your swimming pool’s water level:

1.Drain the pool down to a recommended level (consult manufacturer instructions).
2.Use a submersible pump if necessary for faster draining.

Protect The Pool Plumbing

Safeguarding your plumbing lines from freeze damage:

1.Blow out plumbing lines using an air compressor or shop vac, starting with return lines and ending with skimmer lines.
2.Install skimmer plugs into each skimmer basket hole to prevent water from entering pipes during winter.

Winterize The Pool Equipment

Prepare your equipment for storage during winter months:

1.Clean debris from the pump basket, filter grids/cartridges, and other equipment.
2.Drain all excess water from these components before storing them in a dry location away from freezing temperatures.
3.Disconnect and store any additional accessories such as ladders or diving boards.

Install The Pool Cover

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Proper installation of a pool cover is essential for effective protection:

1.Ensure that the cover is clean and free of debris before placing it over your swimming pool.
2.Securely fasten the cover using water bags, cover clips, or anchors provided by manufacturers’ recommendations for added stability throughout winter months
3.Check carefully for any gaps or openings in coverage area; repair them promptly if detected.

Regular Maintenance During Winter

While your swimming pool remains closed during winter months:

  • Remove any debris or standing water from the pool cover regularly to prevent damage.
  • Periodically test the pool water chemistry and adjust as necessary to maintain balanced water.
  • Inspect the pool cover for any signs of wear or damage and address them promptly.

Opening The Pool in Spring

When warmer weather returns, it’s time to open your swimming pool again:

  1. Remove the pool cover carefully, ensuring no debris falls into the water.
  2. Thoroughly clean and store the cover until next winter season.
  3. Reconnect and reinstall all previously disconnected equipment such as pumps, filters, etc., following manufacturer instructions.
  4. Refill your swimming pool with fresh water to its appropriate level based on manufacturer guidelines
  5. Test and balance your water chemistry using a reliable test kit before starting up the pump and filter system.


Winterizing a swimming pool is crucial for protecting its structure, plumbing lines, and overall longevity. By following these step-by-step guidelines for winterization process each year, you can ensure that your investment stays safe during colder months while also minimizing potential repair costs.

Remember: Regular maintenance during winter months helps maintain a healthy environment inside your closed swimming pool so that when spring arrives again – opening up becomes easier than ever!


  • Drain plugs: Plugs used to drain water from various parts of the pool equipment, such as the pump or filter.

  • Ground pools: Pools that are built into the ground rather than above ground.

  • Hoses: Flexible tubes used for transferring water between different parts of the pool system.

  • Leaves: Fallen leaves and other organic debris that can accumulate in a swimming pool if not properly maintained.

  • Pool equipment: Various devices and components necessary for maintaining and operating a swimming pool, including pumps, filters, heaters, lights, etc.

  • Pool pump: The device responsible for circulating water through the filtration system to keep it clean and clear.

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    Air pillow: Inflatable pillow placed under a winter cover on an above-ground pool to absorb ice expansion during freezing temperatures.
  • Pool lines: Pipes or conduits that transport water throughout the pool system for filtering and circulation purposes.

-Pool vacuum : A device used to remove dirt and debris from the bottom of a swimming pool by suctioning them into a collection bag or filter cartridge.

-Cartridge filter : A type of filter commonly used in pools which uses replaceable cartridges made up of pleated fabric material to trap debris from passing through.

-Chlorine levels : The measurement of chlorine concentration in your swimming pool’s water which indicates its effectiveness at killing bacteria and controlling algae growth.

-Pump baskets : Baskets located within your pump where large debris like leaves is collected before reaching impellers inside your pump housing preventing damage caused by clogging them

-Basket (skimmer) – Basket found inside skimmer designed with openings on sides typically square or rectangular shape prevents unwanted objects enter skimmers

-Skimmer basket – This is another type usually rounded basket found near return jets comes apart easily has few holes more finer holes compared basket serves same purpose allowing easy cleaning avoiding excess work on main drain once removed placed upside down sprayed using hose will help remove large debris

-Pool for winter – Preparing pool for harsh winter weather protecting from damage using various methods like draining water, balancing chemicals adding suitable winterizing kits etc.

-Valve: A device used to control the flow of water or other fluids within the pool system.

-Algae growth: Unwanted and unsightly green or slimy substance that can develop in pools if not properly maintained and treated with appropriate chemicals.

-Safety cover: Heavy-duty cover designed to securely fit over a swimming pool during the off-season to prevent accidents and keep out debris.

-Solid covers : Solid vinyl covers specifically made for above-ground pools which block sunlight preventing algae growth throughout swimming season helps protects against leaves dirt more importantly prevents drownings by creating a barrier stopping anyone accidentally falling into it

-Swimming season: The period of time when a pool is open and available for use, typically during warmer months.

-Above-ground pool: A type of swimming pool that is built above ground level rather than being fully submerged in the ground.

-Pool walls : Structural components forming sides holding shape filled liquid generally constructed using concrete panels wood aluminium steel etc., comes different shapes sizes depths according design owner desires

-Pool chemicals : Various chemical substances used to maintain proper water chemistry in a swimming pool, including chlorine, pH adjusters, algaecides, etc.

-Pool liner : The material that lines the inside surface of an inground or above-ground pool providing waterproofing protection often made up Vinyl usually easy clean replace lasts years.

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Mike Hunter

Mike is the owner of the local pool shop. He's been in the business for over 20 years and knows everything there is to know about pools. He's always happy to help his customers with whatever they need, whether it's advice on pool maintenance or choosing the right chemicals. He's also a bit of a pool expert, and is always happy to share his knowledge with anyone who's interested.

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