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Thread: Main drain and floor return not closed properly last year

  1. Back To Top    #1

    Join Date
    Oct 2012
    Location
    Ontario, Canada
    Posts
    3

    Main drain and floor return not closed properly last year

    I did my first close last year and based on some advice I didn't do anything special for closing the main drain or floor return. The logic was that the main drain and floor return were at the bottom of the pool therefore below the frost line. It gets cold here in Ontario, Canada. In spite of this when I opened the pool this year the skimmers and returns worked and as far as I was concerned the pool was clean and ready to swim. I didn't really notice the main drain and floor return were not working until I used the heater some time late summer and didn't feel any heat coming from the floor return.

    Confirmed today when I started closing. I use the main drain to bring the water level below the returns. The main drain has no suction. We used the pool all summer and didn't experience any leaks I noticed. How can I figure out if I damaged the main drain and floor return? Should I just close the pool like last year and get it pressure tested in the spring?
    45,000 litre pool
    UV sanitizer
    Vinyl liner
    Hayward filter and pump
    Chlorinator

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    UnderWaterVanya's Avatar
    Join Date
    Jun 2012
    Location
    Mint Hill, NC
    Posts
    2,589

    Re: Main drain and floor return not closed properly last yea

    Do you have separate valves for md and floor return where these can be isolated on/off?


    - Sent using Tapatalk
    Inlaws Pool Boy since June 14th 2012, Pool built ~ 2003, In-Ground, 16'x32'
    13500 gal, Vinyl Liner, Fiberglass Slide, TF-100 Test Kit, Hayward 210T
    sand filter, A.O. Smith 1.5HP main pump motor (C48L2N134C1),
    Hayward SuperPump (model ?), Polaris 380 & PB4 Booster Pump

  3. Back To Top    #3

    Re: Main drain and floor return not closed properly last yea

    I blew out my main bottom of pool intake line with a 5hp shop vac and couldn't get air bubbles to come out before i closed the valve. I went ahead and opened the valve and poured 1 gallon of rv antifreeze in the line then repeated the process of blowing out the line with shop vac, while closing the valve(still no air bubble visible while blowing). My thought was that i should buy the balboa mighty vac 2.75 hp blower vac for pools to do this job or do you think i need to worry about it. I live in Indianapolis, IN

    my pool is approx 8ft deep, 35,000 gallons, gunite/plaster inground with sand filter and 1hp pump
    __________________________________
    Joe from Indy, In
    35,000 gallon Gunite/Plaster Inground
    1HP super pump
    HAYWARD 220t Sand Filter
    8feet deep end with diving board

  4. Back To Top    #4
    UnderWaterVanya's Avatar
    Join Date
    Jun 2012
    Location
    Mint Hill, NC
    Posts
    2,589

    Re: Main drain and floor return not closed properly last yea

    Quote Originally Posted by joconnor72
    I blew out my main bottom of pool intake line with a 5hp shop vac and couldn't get air bubbles to come out before i closed the valve. I went ahead and opened the valve and poured 1 gallon of rv antifreeze in the line then repeated the process of blowing out the line with shop vac, while closing the valve(still no air bubble visible while blowing). My thought was that i should buy the balboa mighty vac 2.75 hp blower vac for pools to do this job or do you think i need to worry about it. I live in Indianapolis, IN

    my pool is approx 8ft deep, 35,000 gallons, gunite/plaster inground with sand filter and 1hp pump
    Welcome to the forum!

    BTW - you should start a new thread for this - doing what you have done here is called "Thread Hijacking" and it is frowned on.

    Also you should move the pool info you posted into your signature - info on that and other stuff for new users is here: pool-school/read_before_you_post
    Inlaws Pool Boy since June 14th 2012, Pool built ~ 2003, In-Ground, 16'x32'
    13500 gal, Vinyl Liner, Fiberglass Slide, TF-100 Test Kit, Hayward 210T
    sand filter, A.O. Smith 1.5HP main pump motor (C48L2N134C1),
    Hayward SuperPump (model ?), Polaris 380 & PB4 Booster Pump

  5. Back To Top    #5

    Re: Main drain and floor return not closed properly last yea

    thanks..didn't mean to hijack. i would delete thread, but cant figure out how. maybe i shouldnt be replying to this either?? oh well just tried to get some advice..guess i will just call my pool guy.
    __________________________________
    Joe from Indy, In
    35,000 gallon Gunite/Plaster Inground
    1HP super pump
    HAYWARD 220t Sand Filter
    8feet deep end with diving board

  6. Back To Top    #6

    Join Date
    Oct 2012
    Location
    Ontario, Canada
    Posts
    3

    Re: Main drain and floor return not closed properly last yea

    Quote Originally Posted by UnderWaterVanya
    Do you have separate valves for md and floor return where these can be isolated on/off?


    - Sent using Tapatalk
    Yes I have separate valves for each.
    45,000 litre pool
    UV sanitizer
    Vinyl liner
    Hayward filter and pump
    Chlorinator

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