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  1. #1
    ramnj's Avatar
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    OPAS Riva Block Offs Plugs

    Anybody know where I can get the block-off fitting that goes on the pump of the RXT and the rubber vacuum cap that goes on the thru-hull fitting? (See pic below)

    I installed the Riva OPAS block offs but am missing these two items. Went to Pep Boys and Auto Zone but could not find them.
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  2. #2
    Nonstop, all day, everyday. 01xdime's Avatar
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    I'l do you one better and make you and aluminum plate to block off the hole after you remove the "t-valve" alltogether for $10 shipped. The way i look at it there's no sense in having something there that no longer serves a purpose.

  3. #3
    cbrich's Avatar
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    On the inside of the hull use a piece of hose to connect to both sides of the OPAS water lines fitting. I have not had a problem since.

  4. #4
    cbrich's Avatar
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    Quote Originally Posted by 01xdime View Post
    I'l do you one better and make you and aluminum plate to block off the hole after you remove the "t-valve" alltogether for $10 shipped. The way i look at it there's no sense in having something there that no longer serves a purpose.
    Post a picture of the plate. How thick is it? I might just be interested.

  5. #5
    Vman's Avatar
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    Nice, Josh. $10 is a deal. Rafi: you messin' with that ski already- sweet.

    You should be able to get that vacum cap anywhere- look in that "help" section in the auto parts stores.

  6. #6
    Vman's Avatar
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    Tell ya what I did too- if you want... tapped those two plastic hose barbs in the stock opas fitting (inside the hull) 3/8 x 16 and inserted ss 3/8 cap screws in there with some silicone.

    You are going to want that plate though- because later you can drill and tap through the center of it and use that for your separate IC cooling line .

  7. #7
    Nonstop, all day, everyday. 01xdime's Avatar
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    Quote Originally Posted by cbrich View Post
    Post a picture of the plate. How thick is it? I might just be interested.
    I believe it's 1/16th or 1/8th. It's by no means bling bling because it is in fact made from cut up street signs ( yes i get them legally at my work). If you want one wih the sign material and adhesive removed thats gonna be a few dollars more since it's so damn hard to remove. We've been using this aluminum to make opas block offs and brackets for a while now. The piece also fits in the stock rubber t-valve gasket.




  8. #8
    Prohibido usuario
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    I got the plug at a boat store. I installed it and filled the hole inside the pump with JB Weld so it was smooth. For the tube they had a nylon bolt that I inserted and clamped off. That way if i ever need it again for anything it's easily reconnectable. One day I'm going to have a squirt hose and the pressure that is created here must be high to lift the OPAS fins.

  9. #9
    wavehummer's Avatar
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    I used the hose from one side of the opas. Clamped it to the nipple inside the hull and bent it around and clamped it to the other nipple.

    at first i used the hose from the pump nipple and plugged the nipple that u show in the pic, but if you dont pull down on the white nipple it still lets water shoot inside the hull

  10. #10
    Fast & Loud meeper's Avatar
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    i still have the cap that came with my riva thru hull if you want that, my RXP doesnt use it

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