How To Close An Above Ground Pool

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In most parts of the country, the inevitable end of summer’s warm weather will arrive. And unless you’re a polar bear, you’ll want to close your pool until the spring. Properly closing above ground pools protects them from debris and harsh winter weather. This helps reduce the time and money needed to open your pool in the spring. You’ll also eliminate additional electrical and chemical costs by closing the pool and avoid possible freeze damage to equipment and plumbing. Follow the steps below for winterizing your above ground pool.




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Step 1

Several days prior to closing an above ground pool, test the water for pH, total alkalinity, calcium hardness and chlorine. Adjust levels if necessary. It is important to get the water balanced to protect the pool from corrosion or scale buildup that can occur while it's shut down. You should test for the following: pH 7.2 - 7.6; Alkalinity 80 - 120 ppm; Calcium Hardness 175 - 250 ppm; Chlorine 1 - 3 ppm.

Click Here for Your Winterizing Water Test Kit 


Step 2

Step 2 Above ground pools need to be cleaned before winterizing. Brush and vacuum the sides and floor. Use a clarifier to get water crystal clear. Lower water level while vacuuming (set filter to waste bypassing sand). Clean the tile line to remove oil and scum line so that it will not set on during winter months.

Click Here for Swimming Pool Brushes, Leaf Skimmer, Vacuum Heads & More 


Step 3

Winterizing chemical kits are available to help protect water quality during the winter months. This is a convenient way to get all of the necessary chemicals for closing your pool. Carefully follow the instructions on the product labels. Additional algaecide and shock can be purchased separately for larger size above ground pools.

Click Here for Winterizing Chemical Kits

Step 4

Clean the filter, skimmer, and pump basket. Remove all unused chlorine product from the chlorinator. Cartridge filter elements and D.E. grids should be sprayed with cleaner and rinsed with a garden hose. Sand filters should be backwashed.

Step 5

Lower the water level below the returns and skimmer. Never completely drain above ground pools - hydrostatic pressure can cause damage. Using an air compressor or shop vac (attached to the blower side of the vac), blow water out of system by forcing air down skimmer and through the plumbing. Add pool anti-freeze to plumbing and install threaded winter plugs to the return fittings to keep water out of lines. Pool anti-freeze is a non-toxic formula. DO NOT USE AUTOMOBILE ANTI-FREEZE IN YOUR POOL.

Click Here for Pool Water Anti-Freeze

Step 6

Remove all drain plugs from pump, filter tank and any other pool equipment. Follow the manufacturers’ instructions for your specific equipment. Place all drain plugs in pump basket for storage so your can find them easily in the spring.

Step 7

If you are using air pillows under your pool winter cover, inflate them with a leaf blower or shop vac. Tie off air pillow in the center of the pool; larger pools will require two or more air pillows. The air pillows will shed water toward the edge of pool for easier removal. They also allow forming ice to crack inward preventing damage to the shell or structure of the pool.

Click Here for Above Ground Pool Air Pillows

Step 8

Place winter cover over pool surface, black side down, and secure it with the cable and winch under top ledge of pool. In very windy areas, we recommend using winter cover seal, a tough plastic wrap material which is wrapped around above ground pools to keep wind from getting up underneath the cover. An automatic or manual cover pump can be used to remove rainwater and melted snow that collects on top of the cover.

Click Here to View Our Full Selection of Above Ground Pool Winter Covers 


Comments

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(1 to 40 of 50)

 Posted: 9/6/2020 

I bought your closing kit and read the directions. When putting winterizing chemicals in shouldn't the pump run for a few hours to circulate the chemicals well before covering AG pool? The directions just say to mix with water and pour in while walking around the pool.
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InyoPools Product Specialist  Posted: 9/9/2020 

You can run your pump or mix it in using a brush or telescoping pole to agitate the water. I have seen it done both ways. I would read the instructions carefully, as some chemical kits include a product that should not go through the filter media. For sand and DE filters, the multiport valve would be set to recirculate, and for cartridge filters, the cartridges should be removed.
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 Posted: 9/1/2020 

I’ve never used a skimmer cover but am considering it this year assuming I can forgo draining the pool by using one. Is this true? Is there anything else I need to do if I use this cover? Typically I drain below the lowest hole (pool return), use a pillow, and cover. Thanks!
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 Posted: 6/5/2019 

CAN I LEAVE THE POOL STAIRS IN THE POOL FOR THE WINTER, OR DO I NEED TO TAKE THEM OUT?
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InyoPools Product Specialist  Posted: 6/6/2019 

Most step manufacturers advise that you should remove the pool step during winter.
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 Posted: 10/31/2018 

I live in Phoenix AZ so I covered my 14'x42" pool last winter and only ran my pump about 8hrs a day. I did add liquid chlorine once a month. I covered my poolin Nov and opened it in March. It was a seemed to work well last year. Is there something else I should be doing?
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InyoPools Product Specialist  Posted: 10/31/2018 

Hello Tami - We would recommend adding winterizing chemicals when closing the pool. Our winterizing kits include Rust and Scale Preventer, Shock, and Winter Algaecide. The liquid chlorine that you added is similar to the shock in our kit. The other two chemicals in our kit are meant to prevent metal stains, scaling, and algae.
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 Posted: 10/19/2017 

When do I turn my pump to winterize?
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 Posted: 10/13/2017 

Jim - The skimmer is the approximately 4"x 6" opening in wall at the top of the pool surface that sucks or "skims" debris off the top of the water and supplies water to the pump and filter. Water is returned back to the pool through jet returns.
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 Posted: 10/9/2017 

So, yes, remove the filter and store it inside. What do you mean by skimmer? Is that the lines that pull the water to the filter or the one that pumps it back into the pool from the filter?
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InyoPools Product Specialist  Posted: 9/28/2017 

Jodie - You would generally drain the pool to 3-4" below the skimmer and then plug the holes below that. Here is a link to Rubber Expansion Plugs.
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 Posted: 9/26/2017 

I've read and others have told me to completely remove the pump from the pool and store in garage or other warm environment. Would I drain pool below all the holes in the pool or can you plug those holes with something (can you tell I'm a new pool owner??)
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InyoPools Product Specialist  Posted: 9/17/2017 

New - I don't see your reference to 65 degrees. I would guess it is more of an arbitrary point in the season where you probably won't be using your pool anymore and can start closing it down. You can add your winterizing chemicals anytime prior to the pool water freezing.
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 Posted: 9/17/2017 

I use bungee cords and hang kitty litter containers (full) from the wholes in pool cover as well as clips. Windy area didn't work with deck and cable. No cover lift.
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 Posted: 9/14/2017 

Why does the directions tell me to wait until water temp is 65 or below to put chemicals in? Water temp is still 70 degrees.
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InyoPools Product Specialist  Posted: 9/14/2017 

Eeeddd - Thank you for this comment. In my response 3-4 comments below, I'd suggested crisscrossing the top of the pool with ropes to keep the cover from parachuting, but this is a good answer too.
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 Posted: 9/9/2017 

Always make sure there is some water on your pool cover then the weight of the water holds tbe cover keeping it from acting like a parachute.
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InyoPools Product Specialist  Posted: 9/7/2017 

JSinNY - I'd recommend buying 2 or even 3 4x4 pillows. That way if one fails, you still have 1 or 2 to hold up the middle of the cover.
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InyoPools Product Specialist  Posted: 9/6/2017 

ldw - Your pool holds 7,000 to 8,000 gallons of water. There should be instruction on the container to tell you how much algaecide to add for your size pool. They may vary by brand of algaecide.
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 Posted: 9/4/2017 

I have to buy a new air pillow before closing my pool. Last year's pillow went flat last winter. Always used a 4'x4' but I was wondering if I can/should use a bigger one under the cover? My AG pool is 15x30'. My neighbor had a new 4.5'x15' pillow that he gave me but I think that would be too big for my pool?
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 Posted: 9/4/2017 

How many ounces of algaecide need to be added to an 18' round pool before closing? Thanks.
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InyoPools Product Specialist  Posted: 9/3/2017 

Anonymous (cover blowing) - Try tying 2 or 3 ropes crisscross across the top of the pool cover. Secure to stakes at the base of the pool.
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Anonymous  Posted: 8/30/2017 

How do you keep the cover from blowing up like a parachute? I am scared it is yanking on the sides way to much.
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InyoPools Product Specialist  Posted: 8/15/2017 

NewToThis - Lower the water level to just below the skimmer and plug the return port. Remember to drain the tubes to and from the pump.
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 Posted: 8/12/2017 

FOr a 21' Wilbar REprieve (above ground),for winterizing should we lower the water level below the skimmer and below the return, or just below the skimmer and use a plug For the return? What do you recommend?
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InyoPools Product Specialist  Posted: 10/20/2016 

New owner - We generally recommend lowering the surface of the water below the skimmer so you shouldn't have that problem.
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 Posted: 10/19/2016 

Do you some how cover the inlet to the skimmer so the winter cover does not force water out of the pool?
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InyoPools Product Specialist  Posted: 10/1/2016 

closing pool - Yes, for hard freezes, you should drain your pool below your light to prevent it from cracking. See recent comment on light cracking.
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Anonymous  Posted: 9/28/2016 

Drain below the light. I made that mistake once and the pressure of the ice cracked the light and the housing.
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Anonymous  Posted: 9/28/2016 

I live on Ontario and I am closing my above ground pool for the winter. My question is when draining the water I know you are supposed to drain it 2" below the pool return, however when I do that my light that is installed is still under water ? Will this crack the light? Should I drain the water below the light?
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InyoPools Product Specialist  Posted: 9/20/2016 

lost - You probably have to get the organic debris off the bottom before you will be able to have clear water. Use a wet vac or invest in an above ground suction cleaner. Make sure your chemicals are balanced. Then shock your pool to a chlorine level of 15 ppm with liquid chlorine. Brush down sides daily for a week. Re-shock if required. This may take a week to clear up.
 Reply

 Posted: 9/18/2016 

I have not been able to get my pool crystal clear all summer. Its' been swimmable but the water is no pea soup green. I can shock it and add algaecide but it wont' get crystal clear. My kids say they can feel grit at the bottom of the pool I had some pool guys open the pool this year and they let ALL of the crap that was on top of the pool fall into the pool It's been a nightmare every since. I said I was going to change the lining and everything next year because I just can't get it crystal clear this year. What should I do?
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InyoPools Product Specialist  Posted: 9/13/2016 

neg - If you have an above ground pool, you do not have to add antifreeze to your pools, but some people add it as a back up in case water gets back in the piping. Make sure the water in the tubes between the pool, pump and filter is blown out. You should also add a gizzmo to your skimmer to keep the freezing water from cracking your skimmer. And I would take the solar cover off of the pool during the winter. It is not as durable as the winter cover.
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 Posted: 9/10/2016 

Do you recommend using anti-freeze? I never used it before. Also, can I leave my solar cover on and put the winter cover over it? Last year I used a mesh cover which was a much heavier cover than the typical cover except I had a bunch of leaves on one side of the pool.
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InyoPools Product Specialist  Posted: 11/2/2015 

Gizzmo - Yes. Gizzmos come in two sizes, 9" and 16". The 9" Gizzmo is recommended for the AG pools.
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Anonymous  Posted: 11/1/2015 

Have you ever heard of putting a Gizmo in the skimmer box of an above ground pool?
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InyoPools Product Specialist  Posted: 10/12/2015 

Terri - The old fashion way to drain a body of water is through gravity. Fill a garden hose with water. Block the ends of the hose to keep water from draining out. Then place one end in the pool and the other end outside the pool on a downward slope. Gravity on the water in the hose will pull water out of the pool.
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 Posted: 10/9/2015 

My local pool company says to drain 4-6" below the skimmer. Is a pump the best way to do this? Just wondering if there is a super-secret that I can't find on google. I don't really want to buy another pump, but will do so if that is the only option.
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InyoPools Product Specialist  Posted: 9/14/2015 

tinner2002 - I would not recommend draining your AG pool completely. The water provides the pressure needed to keep the wall from collapsing. If you have any kind of wind at all, it can blow the wall in and crease it beyond repair.
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 Posted: 9/14/2015 

I live in Las Vegas where we only see temperatures as low as 28 degrees a few days in the winter. most days the low is 35 or above. I was planning on draining completely and just putting on the cover that I just ordered from you. I CAN do that, right? (21 foot x4 foot deep round splash pool).
 Reply