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Thread: Correct way to use collars on barbed slip-on couplers

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    Join Date
    Jul 2015

    Question Correct way to use collars on barbed slip-on couplers


    I am a new pool owner and currently doing some piping work to optimise my pool before my first winterizing.

    One thing I am unsure about is the correct way to use collars with slip-on barbed couplers, for example, to join a piece of flexible PVC hose (backwash port) to a 50 ft long polyethylene pipe (waste water). I intend to use a slip-on barbed coupler, 1-1/2 M-M which appears to be poly.

    But where exactly should I place the stainless steel collar before tightening both sides onto the coupler?

    Right in the middle of the barbs? Or just before the barbs, on the "outside"? Should I use two collars? Add some silicone (or some other substance) before slipping on the pieces onto the coupler?

    I have some leaks (very, very slow drips but it annoys me), maybe i'm not doing it right.

    Thank you very much for your tips!


  2. Back To Top    #2
    Mod Squad JVTrain's Avatar
    Join Date
    Feb 2014
    Central Minnesota

    Re: Correct way to use collars on barbed slip-on couplers

    On the barbs is how it's done, near the middle. You can use some silicone to help it slide on easier but that won't necessarily improve the seal.
    Joel - TFP Moderator - Minnesota - **Become a TFP Supporter!** Helpful Links: ABCs of Pool Water Chemistry - SLAM Procedure - Chlorine/CYA Chart
    40x20 Pool: 32K Gallons * Vinyl * Bleach Chlorination * Hayward S270T Sand Filter * Pentair SuperFlo 1 HP * Teledyne/Laars Heater * AquaVac Tigershark * TF-100 w/ SpeedStir
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  3. Back To Top    #3
    LFrankow's Avatar
    Join Date
    Sep 2012
    Medicine Hat, Alberta

    Re: Correct way to use collars on barbed slip-on couplers

    I also tap the whole SS gear clamp all the way around then use my nutdriver to re-tighten it. The gear and strap tend to bind, an inherant property of SS to SS, tapping it lightly all the way around ensures you get it as tight as it can get. Careful not to strip the strap though, but if you do, undo the claamp and using a hammer to pound the strap flat again, can get you out of a tight spot.
    Lou - 13.5K Gal pool, AG Intex 24 X 52"
    19" Sand Filter/1 hp pump, Aqua Trol SWG
    90 sq ft Homemade Solar panels + 80 sq ft Fafco panels, coupled with a SS heat exchanger/Hot Water Tank, Pentair SolarTouch, Taylor k-2006

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