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  1. #1
    Sanfish's Avatar
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    Jun 2014
    S/E Florida

    Riva Catch Can Mod (prevent water in canister)

    If you ride aggressive and have a Riva Catch Can, you most likely have this issue (only on newer'12-'15 RXPX hulls).

    If you ever removed the left yellow trim piece just below seat (red if '14), you will notice the front is held into place with a plastic push pin. When water is splashed in that area (outside of hull), the design of the push pin lets water drip into hull, then into Riva catch can filter since its directly above push-pin. Some water may also come through seat seal but if it does, its not much.

    You have several option.
    A) Silicone RTV the inner hull side where the push-pin come through.
    B) Use the top of a spray can as a lid for the small Riva filter.
    C) Re-route the top of the catch can to vent outside the hull.

    I choose option "C" for two reasons. Because I first did option "B" and while it worked pretty well at keeping water out of catch can, it wasn't 100% effective. The other reason why I went with option "C" is because those of you that have recently installed a catch can will notice there is a constant oily "fumes" smell in the hull. I prefer to vent the catch can outside the hull for a win/win.

    Parts needed: (around $17)
    2 INCH long 1" ID hose
    3 FT long 3/4" heater hose
    90-degree copper elbow (HomeDepot - I think it was 1" to 3/4" adapter)
    90-degree thru-hull fitting (3/4")
    90-degree copper elbow (optional - used on the thru-hull exit to prevent water entering)

    Here are some pictures to better explain how I did mine.

    The plastic push-pin that lets water drain into hull and into catch can:
    Click image for larger version. 

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    Option "B" fix - Aerosol can top:
    Click image for larger version. 

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    Option "C" fix - vent outside hull:
    Click image for larger version. 

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    This is the 3/4" thru-hull fitting. In my case, I pushed on a 90-degree elbow fitting to help prevent/lower any chance water can enter: (this is optional)
    Click image for larger version. 

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    Only problem with this design, if you flip boat upside down while in water. Then again, if that happens you have bigger issues to worry about...

    Bonus tip:
    I cut to fit a 3M Scotch-Brite pad rolled up and placed inside catch can. This acts like a filter and lowers the chance you get water contamination.
    These are the pads commonly used in body/paint shops.

    NOTE: I'm not 100% sure but I think the Fizzle catch can doesn't place the filter element directly below the plastic push-pin like the Riva model does. However, it still vents inside hull and water will still drip at the plastic push pin. Also, this article isn't an exact step-by-step as it will requires you to still figure the basic stuff out.
    Last edited by Sanfish; 01-03-2015 at 09:21 AM.

  2. #2
    Good stuff - thanks for highlighting the fume smell in the hull. I've never liked that either.

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