How to Close a Pool for Winter
If you live an area where the weather gets cold during the winter, then you'll need to close your pool. Here we give you a step-by-step guide on how to do it right. And make sure your pool opening will be a breeze in the spring.

What You’ll Need

Hamilton Index™

Index chart for balancing

No Mor Problems

Preventative Algicide

Pool Stain Treat

Stain Prevention

Shock

Net

Skimmer net

Brush

Regular nylon pool brush

Vacuum

Vacuum head

Lubricant

Lubricant for Fittings

At a Glance

steps

hour work

days results

10 Steps to Close Your Pool

Step 1: Balance

The first step in the closing your pool is to make sure your water chemistry is balanced. You should make sure that your pH, Hardness, and Total Alkalinity are all balanced to protect the surface of the pool from staining and etching.

TIP: Use the Hamilton Index™

We recommend you balance according to the Hamilton Index™

Step 2: Run Filter for 24 hours

Step 3: Remove Debris

Remove all debris from the pool. If necessary, vacuum the floor, and use a skimmer or leaf net to remove floating items. Clean the surface of the walls and floor with a stiff-bristle brush to ensure that no residue or dirt is present.

Step 4: Remove Fittings

Remove all of the pool’s fittings, such as wall fittings, solar blankets, skimmer baskets, cleaners and lights. Pool accessories should be removed as well, including the ladder and diving board. Store all of these items inside for the winter to protect them from the elements.

Step 5: Lower Water Level

Using the filter pump and setting the inlet to pull from the main drain, lower the pool’s water level to approximately 2 inches below the lowest return line. If your pool is lined with tile along the edge, make sure the water line falls below the bottom of the tile. In a vinyl-lined pool, it is not necessary to lower the water.

Step 6: Drain Pump and Filter

Drain all pumping, filtering, heating, and sanitizing equipment to prevent any damage from freezing. If any water is left inside these items, they may freeze and crack when the temperature drops. A small pump and filter may be stored indoors for the winter. Otherwise, use a compressor or shop vacuum to make sure that all the water is blown out of the equipment.

TIP: Look for drain plug

Most equipment are fitted with drain plugs to allow for easy drainage.

Step 7: Blow out lines (Inground Pools)

In an in-ground pool, the plumbing lines must also be blown out for the winter. Use a vacuum blower for the job, and finish by placing expansion plugs on the lines. If you do not want to blow out the plumbing, add an antifreeze product to the line. With an above-ground pool, simply detach the hoses that connect to the filter and pump, and add plugs to the outlets.

Step 8: Lube

Lubricate o-rings, plugs, and valves; this will make it easier to open the pool in the spring.

Step 9: Winterizing chemical

Add a preventative algicide (12 oz. of No Mor Problems® per 20,000 gallons) to prevent algae blooms and bacteria, and add a stain inhibitor/chelator (2 pounds of Pool Stain Treat® per 20,000 gallons) to prevent staining during winter. Make sure to perform one last shock treatment.

Step 10: Cover

The final step in the winterizing process is to install your pool’s cover. Make sure it fits correctly and inspect it for holes or damage in the surface material where debris may enter. For an in-ground cover, use some type of water bags to secure the cover in place. An above-ground pool cover is usually secured with cables.

Pool Closing Do's

  • Run the filter for 24 hours to get everything out of the water
  • Remove debris to prevent stains from forming over winter.
  • Drain all water from equipment and lines to prevent any damage
  • Add preventatives to protect against algae and stains over the winter

Pool Closing Don'ts

  • Don’t leave water in plumbing – this could lead to lines bursting
  • Don’t leave water in your pump and filter – this could damage your equipment
  • Don’t forget to add preventatives to prevent algae and stains in the spring

 

Read More

How to Close a Pool for Winter

If you live an area where the weather gets cold during the winter, then you’ll need to close your pool. Here we give you a step-by-step guide on how to do it right. And make sure your pool opening will be a breeze in the spring.

How to Clean a Pool Filter

Your filtration system plays an important role in your pool maintenance. The filter system not only gets rid of dirt and debris in the swimming pool, but also helps fight algae. Keeping your filter clean makes sure your pool always looks good. In this how-to, we go over the step-by-step DIY of cleaning pool filters

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