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Thread: Flexible PVC and Smooth fittings...avoid at all costs.

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    Flexible PVC and Smooth fittings...avoid at all costs.

    Just a live and learn here guys. I went to the pool store---got everything I thought I needed to hook up my pump and filter. The owner of the store cut me some flexible PVC to hook up between pumpo and filter along with 2 threaded to smooth fittings. This will NOT work. I learned the hard way.
    Only threaded to barbed fittings will work. I dont care how many clamps you put on, unless you have a very weak pump the clamps are not enough to hold the PVC hose on and keep it from leaking.
    When i told the original pool store my issue they said I would have to get a plumber---essentially not their issue. Dopes. How some of these guys in pool stores are able to operate with so little knowledge of their business is beyond my realm of understanding.
    21' All Steel AGP with Resin caps, Heyward S244T Sand Filter, Heyward 1HP 2 speed pump

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    linen's Avatar
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    Re: Flexible PVC and Smooth fittings...avoid at all costs.

    Quote Originally Posted by gdog2004
    How some of these guys in pool stores are able to operate with so little knowledge of their business is beyond my realm of understanding.
    That is why people are here.

    Quote Originally Posted by gdog2004
    2 threaded to smooth fittings. This will NOT work.
    I don't think I have ever seen a non barbed nipple, if it is not too much trouble, could you post a pic?
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

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    Re: Flexible PVC and Smooth fittings...avoid at all costs.

    Flexible PVC is really not designed to be clamped. It has internal reinforcing that keeps it from collapsing. Flexible PVC should be glued into schedule 40 PVC fittings.

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    linen's Avatar
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    Re: Flexible PVC and Smooth fittings...avoid at all costs.

    The stuff I have used between the pump and the filter is clear with a reinforcement web. I am pretty sure it is PVC? It works well with clamps. I agree that the white opaque flexible PVC stuff does not work well with clamps, too stiff.

    gdog, was yours white opaque?
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

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    Re: Flexible PVC and Smooth fittings...avoid at all costs.

    I know this has been discussed before, the pipe we have in Europe must be different but looking on the web I have found the flexible PVC pipe labeled as schedule 40 pipe for the US.


    This can either be glued into fittings or used with the demountable compression fitting which makes it very handy.


    Is the pipe you are discussing different?

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    linen's Avatar
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    Re: Flexible PVC and Smooth fittings...avoid at all costs.

    teapot, that is the pipe I am refering to as opaque white pvc, we will have to hear from gdog to see if that is what he used. Those look like nice compression fittings! How reliable are they compared to a glue joint?

    The tubing that has worked for me is a clear reinforced PVC I have gotten is on the bottom of this catalog page: http://www.mcmaster.com/#catalog/117/99/=dv30f9 It is more flexible than the typical flexible pool pvc and works well with hose clamps. I am using it between my pump and filter with 1 hose clamp on each nipple joint. I got it a my local fleetfarm (kind of a big box store locally, might be able to get it a home depot).
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

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    Re: Flexible PVC and Smooth fittings...avoid at all costs.

    Heres what I mean by flexible PVC and the smooth pool fitting.

    [attachment=2:1oczjiq6]flexPVC.jpg[/attachment:1oczjiq6]

    [attachment=1:1oczjiq6]thumb-Pool fitting.jpg[/attachment:1oczjiq6]

    What you need with the flex PVC is this..
    Attached Images Attached Images
    21' All Steel AGP with Resin caps, Heyward S244T Sand Filter, Heyward 1HP 2 speed pump

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    linen's Avatar
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    Re: Flexible PVC and Smooth fittings...avoid at all costs.

    Quote Originally Posted by gdog2004
    What you need with the flex PVC is this..
    With that type of pvc, I find it is almost to stiff to use a hose clamp. Like JamesW, I usually glue that type. The clear I posted has a lower durometer and less reinforcement and therefore clamps nicely.
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

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    Re: Flexible PVC and Smooth fittings...avoid at all costs.

    Quote Originally Posted by gdog2004
    Heres what I mean by flexible PVC and the smooth pool fitting.

    [attachment=2fsg762w]flexPVC.jpg[/attachmentfsg762w] That's schedule 40 flex pipe as I described

    [attachment=1fsg762w]thumb-Pool fitting.jpg[/attachmentfsg762w] That fitting is a poolside fitting for the very thin flexible used on pool cleaning brushes etc
    What you need with the flex PVC is this..
    That fitting is for thin flexible with a cuffed end and tube clamp for the pipes from pump to filter etc, not for schedule 40 pipe

    Linen, no problems so far with the compression fittings for flexy.

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    Re: Flexible PVC and Smooth fittings...avoid at all costs.

    Quote Originally Posted by gdog2004
    smooth pool fitting.
    Ohhh now I know what you are talking about. Yeah, I have not liked those fittings with there "ability" to fit two different pipe sizes. When I have used them, I only use them where there is something resisting the separation of the joint and I have low durometer tubing (something that conforms) that I am attaching.
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

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