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Thread: Draining an inground pool

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    Draining an inground pool

    I haven't done any treatment or filtering to the water in my Sylvan-brand (concrete) pool since early August, and it's time to close it for the season. The water is near-black and the pool is filled with leaves from our heavily-treed yard. We already know we don't plan to use the pool at all in 2013 and we may or may not use the pool in 2014. What I would like to do is, drain the pool completely and get all the debris out. I've read that in certain kinds of pools (concrete or fiberglass) you can't drain them without first setting up some heavy-duty wooden bracing, because the whole pool, if emptied, can tend to bulge, crack, or rise up out of the ground.

    This is not a new pool -- it's at least 20 years old.

    My questions are:

    1) Am I ok to just drain the pool empty wihtout installing any temporary support bracing, and walk into the pool and remove the leaves and debris? - and -
    2) If I drain the pool, blow out the lines, install gizmos, etc., can I just leave the pool empty (but covered with a spring-loaded safety cover) for the winter?

    Thank you

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    Mod Squad Bama Rambler's Avatar
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    Re: Draining an inground pool

    Welcome to TFP.

    There's no way for us to answer either of those questions without more info. Like where you're located, how high is the water table where you are, how much snow do you get a year, and what's the surface coating of the pool?
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
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    Re: Draining an inground pool

    Thanks for your reply and the welcome, Dave!

    I'm in Lincroft, NJ. We generally get a 5 snow storms per year, about 6 inches each on average.

    Honestly not sure what the surface coating is. I've attached a picture to hopefully help.

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    Mod Squad Bama Rambler's Avatar
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    Re: Draining an inground pool

    As for the safety cover it should be fine but I don't know how deep the water table is there. A high water table is what causes a pool to float.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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    Qwaxalot's Avatar
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    Re: Draining an inground pool

    In my opinion, it's a very bad move to leave a pool empty for any extended period of time, even if the water table is low.
    I would suggest, instead, that it would be more prudent to winterize it and cover it, without draining; understanding that when you do want to recommission the pool it will need to be drained and cleaned.
    In the industry, CSP (Certified Service Professional) by the NSPI and it's successor the APSP. My company services over 600 pools every year. I think the practices regularly espoused on this forum (especially the BBB method) are outstanding; however my comments will be often oriented towards the goal of getting it done, and getting it done right now!

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    bobodaclown's Avatar
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    Re: Draining an inground pool

    Leave if full, and have wood decking built over it. (2X6 or 2X8 16 inch spacing then go over with wire mesh). Think shutting it down like when they do a foreclosure. This like will provide an example. http://www.wecleanpools.com/foreclosure.html
    I did a quick link and this is the first one I found that covered what I meant to explain.
    17K Kidney Shaped Pool Concrete (Diamond Bright) Pool, 3/4 hp 2 speed 115V Sta-rite Duraglas PEA5D-180L/P2R5D-181L (Impeller C105-92PS Diffuser C1-216P), 1.5 piping, Pentair CC100 Filter , Heat Siphon 100K BTU Heat Pump Pool Heater, Flow meter Blue White Flowmeter Model No. F-30150P, Hayward Astrolight SP0581N, SWCG CalimarTitanium Edition TE45 , Dolphin Nautilus Plus with CleverClean, Lakeland Florida

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