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Thread: closing an inground swimming pool

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    closing an inground swimming pool

    Hi: This is the first time I am going to close the pool. I will appreciate if any body can tell me what kind of air compressor and how much PSI's I should use.
    Thanks.

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    Mod Squad JohnT's Avatar
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    Re: closing an inground swimming pool

    Can you tell us a little about your pool, plumbing and equipment? Most of the time a shop vac with a blower port is a better choice than a compressor. The high air volume clears the pipes better.
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

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    Re: closing an inground swimming pool

    Not sure if I should post on this thread or start a new one, so please advise.

    I have the same sort of question. My pump is approximately 12" below full pool water level, so I'm not exactly sure how that affects the procedure to clear the lines. My builder closed for us last year, but I was not able to be there to see what he did. My plan was to use a compressor connected at the pump filter basket set at around 15 PSI and plug each return as it started to bubble. The main drain will continue to empty water from the pool until it reaches the level of the pump? I have read something here about an air lock on the main drain, but don't have a clue about that.
    I would appreciate any suggestions. I do not have shop vac with blower port, but I do have a Stihl backpack leaf blower if that is an option.
    Thanks.
    26,000 gal, IG, Vinyl, Sand, Hayward 1 HP Superpump, Hayward Goldline Aqua Plus SWG, Completed 7/2013

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    Re: closing an inground swimming pool

    Quote Originally Posted by jmattdoss4 View Post
    My plan was to use a compressor connected at the pump filter basket set at around 15 PSI and plug each return as it started to bubble. The main drain will continue to empty water from the pool until it reaches the level of the pump? .
    Thats what I do. I use a Sears pancake compressor. 15 PSI is about right. Return closest to the pump blows first. Let it bubble for about 30 seconds, the cap it off. Ther next one blows, do the same thing until its all capped off. Compressor works just fine for me. Cant help too much with the main drain because i dont have one.
    14,000 gallon IG, Vinyl. Hayward 3/4 hp superpump, Penatair IC40 SWCG, Pentair automation, Hayward sand filter, Aqua Comfort heat pump, Hayward 400k Lo-Nox LP heater.

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    n240sxguy's Avatar
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    Re: closing an inground swimming pool

    Quote Originally Posted by jmattdoss4 View Post
    Not sure if I should post on this thread or start a new one, so please advise.

    I have the same sort of question. My pump is approximately 12" below full pool water level, so I'm not exactly sure how that affects the procedure to clear the lines. My builder closed for us last year, but I was not able to be there to see what he did. My plan was to use a compressor connected at the pump filter basket set at around 15 PSI and plug each return as it started to bubble. The main drain will continue to empty water from the pool until it reaches the level of the pump? I have read something here about an air lock on the main drain, but don't have a clue about that.
    I would appreciate any suggestions. I do not have shop vac with blower port, but I do have a Stihl backpack leaf blower if that is an option.
    Thanks.
    The main drain air lock is when you blow it out until it bubbles then close the valve to it so the air prevents water from coming back in the line. I wouldn't use a leaf blower. I have an Echo handheld blower, and the instruction say not to cover the end and prevent air flow. I assume that's because it uses the resistance of the air against the impeller as a governor. Trying to blow lines could cause the engine to over rev because it doesn't have that resistance since it isn't moving any air initially. May not be an issue with the returns, but may be with the main drain. Yours may be different.
    30K gallon IG vinyl. 1.5HP 2-speed Waterway Mustang pump. 600 lb sand filter. Polaris 280. Circupool SI-60+. TF-100

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    zimm's Avatar
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    Re: closing an inground swimming pool

    I tried my stihl blower and it didn't have enough pressure to blow the main drain. I tried my air compressor with 25psi and while it blew the lines, thank gosh my pool pilot SWG has a clear window at the bypass valve because I could see there was still a bunch of water in there. I wouldn't have known otherwise. I had the pool company come over to blow it out properly. They used a specialized pool blower and it did the job. This year I bought my own and it works perfect- has just the right amount of massive flow and low pressure to blow all the water out. It's expensive, but the same price as one pool company closing.
    It's about $300 on amazon
    http://www.airsupplyflorida.com/vac.htm

    45'x12' 17k gal, IG plaster, Pool Pilot Nano+ SWG, 1/2hp Whisperflo pump, PAC-FAB TA-60D sand filter, Raypak 266 heater
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