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Filling Your Above Ground Pool

how to fill your above ground pool?

So you’re finally getting that swimming pool. You’ve figured out which above ground pool to buy, how big it will be, and where it is going to be placed in your yard. You have an installer lined up (or have talked some really good friends into helping you install it), the date is set and you’re ready to go. But what about the water? Where is all that water going to come from in order to fill your swimming pool?

To a pool guy like me, the answer on how best to fill a pool is usually obvious, but I get asked this question all the time under all types of circumstances. To my surprise, over the years I’ve come across many scenarios where the answer isn’t so obvious. Generally, there are five options for filling an above ground swimming pool. For some all five options are viable. However, for some only two options are viable and some have only one viable option. If you have only one option then this decision will be easy. If you have more than one viable option, let’s weigh them up together. Shall we?

Generally, there are five options for filling an above ground swimming pool. For some all five options are viable. However, for some only two options are viable and some have only one viable option. If you have only one option then this decision will be easy. If you have more than one viable option, let’s weigh them up together. Shall we?

The Five Options for Filling an Above Ground Pool

  1. City or municipal water from your house
    Most people now have access to municipal water at their homes. Some homes have septic tanks for their used water and some have to pay for municipal sewage. It is cool  if you have a septic tank, because the water company will only charge you for the water to fill your pool. If you have municipal sewage, it can be expensive to fill your pool as you will be charged the sewage fee for all those gallons of water that the pool took to fill up. Money saving tip: Call your water company and tell them you are planning to fill a pool. They may give you a discount on the sewage or not charge for it at all.

    City/municipal water is excellent for filling swimming pools, because the water is already treated and balanced. 
  1. Well water directly from your well
    Many homes out in the country don’t get municipal water and only have a well. This is not a problem as long as the quality of the well water is good. If your well water is not that good (meaning it’s smelly, cloudy or discolored) it’s still OK, but you’ll have to treat the water in the pool to get it clear and healthy. It will cost you more because you’ll have to get chemicals and it can take a few days to clear up. 
  1. Well water coming through a softener system
    Most homes that have only wells will have a water softening system attached somewhere. Running between 10 000 and 20 000 gallons through a softener has a cost as it will take a good amount of salt and chemicals to do so. 
  1. Water from a delivery service
    This is a nice option, but is usually too expensive for new pool owners. Here in Central Florida there are two guys that offer this service. One guy charges $500.00 for 9 000 gallons and the other guy charges $275.00 for 6 000 gallons. The water quality is always excellent and the pool gets filled really fast. So, it’s a good option, but it is pricey. Also, water delivery services are rare so chances are that you will not have this option anyway.Sometimes there can be issues with filling an above ground this quickly. If the liner is set too tightly or if it’s a beaded liner, it could come out of the bead channel. Keep an eye on things when filling a pool this fast.
  1. Water from the fire department
    Long ago it seems in places far, far away, fire departments kindly used to fill swimming pools. This is now a rare occurrence in most areas, although some still do it usually for a donation or something. This method fills the pool fast too, so keep an eye on the liner while filling your pool.

Expensive Municipal Water Versus Cheap Well Water

A lot of homes have access to both municipal water and a well. If this is the case, do you fill the pool with municipal water that you have to pay for or do you fill it with your well water that’s free? The answer depends mainly on the quality of your well water. If your well water is completely clear, use it. You may have to shock it a little more initially and adjust the chemistry, but it’ll be much less expensive.

If your well water is just OK (meaning it’s a little cloudy and has a bit of an odor), you still may want to fill your pool with it. Certainly this water will take some extra start-up chemicals to get it right, but it’ll still be more cost-effective than filling it with municipal water.

Some other considerations are the condition of your well and its pump. Do you have issues with your well’s pump? Do you feel it’s on its last leg and you have to give it a break often? How about your well? Does it kick up a lot of sand or start to pump really slowly after a while of continuous use? Am I asking too many questions in one paragraph? A pool needs many gallons of water and if you are having issues like this, it may be better just to fill it with your municipal water.

What to Do While the Pool Gets Filled and What to Do Afterwards

Keep an eye on your pool while it is filling up. Make sure the liner isn’t coming loose and that there’s no moisture anywhere around the pool. Also, make sure that you install all of the top rails of the pool and connectors before the pool is more than halfway full. It can be much harder to install these parts after the pool has been filled.

You can take a water sample to a pool store so that they can analyze it and you can get the chemicals it needs for the start-up. You can shock the pool when it’s at least half full, but I would wait until it’s completely full because you can then turn on the pump and run the filter.

author avatar
Dan Dougher

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85 responses to “Filling Your Above Ground Pool”

  1. Halle Vera Avatar

    Hi there, we just bought a 22ft above ground pool, it’s about half full. I’m not able to buy the shock or an extension cord for the pump until tomorrow. But I was wondering if it’s okay if my kids swim in it tonight? Will their be algae by the morning? Is it a bad idea or do you think it’ll be fine?

    1. Lynda Avatar

      You should never run a pool pump/filter via an extension cord. It should be nearest to a power source, SAFETY.
      Treatment for your pool can be added during filling, say at 50% full, add half or your full dose (depending on the size of your pool and treatment plan (ratio etc). When your pool is at the recommended capacity add the other half of the treatment. You can swim in it after about 2 hours of filter/pump running, (depending on the treatment (read instructions). In the meantime, yes the kiddies had certainly had a splash while the pool is filling under adult supervision. Sorry , seems to me that you rushed this so your kiddies could have a swim. I do not think algae will be a problem. My suggestion is to do a shock treatment in the next week or so, if you adhered to the initial instructions, wait a few hours, and after that enjoy.
      Splash Splash

      1. Lynda Avatar

        yes, Lynda you are right depending on YOUR set up.

        1. Matthew Simmons Avatar

          Are you agreeing with yourself?

          1. Lynda Avatar

            yep

    2. Dan Dougher Avatar

      If you are filling with municipal(city) water, then you should be good. Municipal water has chlorine in it so it’s safe for a short period of time at least.

  2. Malissa Avatar

    I have a 16 x 42 easy set pool it almost completely filled can I go ahead and turn the pump on now? I would like to get in the pool in a few hours.

    1. Dan Dougher Avatar

      You can turn the pump on as soon as the pool fills enough so the water can flow through the system.

  3. Darin Avatar

    Just bought a 14’ round above ground pool and I have a well that I’ve been filling up with . I let it run for a few hrs and the water started coming out a little dirty and then the water stopped pouring from the hose . Is this an issue with the well pump ? Should I fill a little at a time ?

    1. Matthew Simmons Avatar

      No, it should not affect the salt pump system. But it does kind of waste the money put into buying the salt system and salt if you don’t use it.

  4. Stefanie Avatar

    Hi there I have a cartridge filter when you first fill the pool. Does the cartridge get dirty in the first couple of days because mine is still white. Does this mean my filter is not working correctly?

    1. Matthew Simmons Avatar

      No, it does not mean it is not working. It just means it hasn’t had enough dirt go through it. if you filled the pool with fresh clean water, it isn’t going to have enough dirt to darken your cartridge. Enjoy the days in which your cartridge material still looks white while you can.

  5. Vee Avatar

    I’m a new pool owner ,so I’m trying to YouTube all the information that I don’t know,the pool was giving to me . How high do I have to fill the pool if It doesn’t have a skimmer ,it’s a Coleman 16*48 . Also I’m guessing this is why the pump isn’t working correctly because the water isn’t over the two holes. Thanks so much

    1. Matthew Simmons Avatar

      Yes, I would guess that would be the problem. The return and the suction line should be under the water level. There should have been an instructions manual that came with your pool to explain proper water levels.

    2. Lynda Avatar

      Was the pool given to you or GIVING to you. Go back to school. Fill the pool with WATER, arrrrhhh.

      1. Caitlin Avatar

        It’s a typo Lynda…..chill

  6.  Avatar

    Hi, while filling my above ground pull should I go ahead and test ghe water and add balance to it

  7. Cathy Avatar

    I’m getting ready to get a above ground pool I don’t have a septic tank it runs thru the city after they install how does it work do you just turn your water on and it runs thru the filter I know it’s a dumb question but I don’t have a clue

  8. Marlene odea Avatar

    Hi I live in Australia I have a inground pool been to 2 pool shops for information about topping up the pool with tank Water all they say you must use chemicals all the time to ad to the pool the owners before installed a $10.000 dollers water system for it so you think you would not have to add chemicals all the time please help I thought for that amount of money spent on it it would be sufficient

    1. Dan Dougher Avatar

      Sorry Marlene. I can’t understand what you are saying. Don’t they use punctuation in Australia? Yea, You’re gonna need that to communicate by writing.

      1. Bridget Avatar

        That was rude and not helpful at all

        1. Alicia W Avatar

          Yeah really, wtf? Uncalled for.

          1. Jen B Avatar

            Right, I was enjoying reading these helpful hints, then got to that one. Are you an English teacher or pool expert?!

          2. Dave D Avatar

            It was impossible to follow what she was saying. His reply might have a bit harsh, but his point was valid. If you’re going to ask someone for help or advice, at least proof read it to make sure its comprehensible. You don’t have to be and English teacher to write something that makes sense.

      2. Karen Avatar

        Sorry, I thought it was awesome. No one seems to think commas, periods, etc., are required, but they are. It’s lazy and I’m glad he called her out on this.

  9. Jackie Avatar

    Can I use soft water in an above ground pool?

    1. Dan Dougher Avatar

      Do you mean salt water? If so, yes you can.

  10. Lawanna Avatar

    WE just installed a above ground steel sided pool. 24 x 54. WE filled it with well water and need to find out what to start with to get the pool clear. WE have not installed the skimmer or hooked up the pump yet ( doing it this weekend ). Just want to know what to do first and then what to do after that to keep the pool clear and the water nice.

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