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Replacing Stanchion Vent

Discussion in 'Catalina 30' started by sgoldman01, Apr 11, 2018. Add this thread to a FAQ

  1. sgoldman01

    sgoldman01

    Joined Apr 11, 2018
    3 posts, 0 likes
    Catalina 30
    Peenhonin US Waukegan Il
    I am going to reroute the vent for the ware and water tanks to a mushroom vent located just belie the toe rail.

    My question is where to locate the vent. It is currently located above the head and locker.

    When I look at this locations there are several screws below the toe rail that suggest that there is some sort of reinforcement there. Can’t prove it.

    Anyone know if there is?

    Should I never the hoses toward the stern and go through the small storage cabinets to the stern side of the bulkheads?
    Any opinions?



    Steve Goldman
    Peenhonin
    1985 Catalina 30 TRBS
    Waukegan, IL
     


  2. Peggie Hall HeadMistress

    Peggie Hall HeadMistress

    Joined Dec 2, 1997
    6,761 posts, 471 likes
    - -
    US LIttle Rock
    Move the waste tank vent to a thru-hull...it can go directly below the toe rail anywhere near the stanchion. Use an open "bulkhead" or "mushroom" thru-hull, NOT a "vent" thru-hull.

    But don't move the water tank vent thru-hull out of the stanchion. Catalina had a good idea to run the fresh water and fuel tank vent lines into stanchions because that prevents sea water from contaminating them when the boat is heeled. But running the waste tank vent into a stanchion was a very BAD idea 'cuz the vent is easy to clog and and also doesn't allow anywhere near enough air exchange keep the tank aerobic...and besides, it doesn't matter if sewage gets "contaminated" by a little sea water..
     


  3. Parsons

    Parsons

    Joined Jul 12, 2011
    519 posts, 151 likes
    Catalina 36
    US Bay City, MI
    As Peggy suggested, I moved the waste vent to a plain mushroom below the toe-rail. You are trying to increase the amount of natural aeration in your waste tank, so don't run the vent hose for more than absolutely necessary - just bend the hose 90 degrees from below the stanchion fitting. I did not see any screws in that area on my C36, below those that hold the rub rail aluminum channel. You'll want to drill with the correctly sized hole-saw from the interior to avoid hitting stuff on the outside. Make sure that you allow enough room below the rub rail for the 'shoulders' of the external mushroom to fit on the outside. I did not allow enough, and actually shaved down a bit of the shoulder with a Dremel to fit flush with the rub rail bottom :oops:. You may need to trim a little hose to make a smooth 90 degree turn outboard so it doesn't kink.

    Consider removing the stanchion, cutting off the vent fitting, and filling the deck with epoxy, fiberglass cloth, and a bit of wood to make it less likely to have leaks. I used the plug from cutting the hull vent to partially fill the deck hole, that way I did not have a ton of epoxy curing in a small space, getting hot. It's under the stanchion in the end, so pretty does not matter.
     


  4. Peggie Hall HeadMistress

    Peggie Hall HeadMistress

    Joined Dec 2, 1997
    6,761 posts, 471 likes
    - -
    US LIttle Rock
    Why would you remove the stanchion instead of just disconnecting the vent line from it?
     


  5. Parsons

    Parsons

    Joined Jul 12, 2011
    519 posts, 151 likes
    Catalina 36
    US Bay City, MI
    The stanchion vent is just one more access point for water to the deck core. For my boat, I had a small amount of moisture at this stanchion at purchase - not severe and no rot, just damp. I was re-bedding the stanchion anyways, and used that opportunity to remove a huge (1 inch) hole in the boat. Sealant is good, but epoxy is perfect!
     


  6. Justin_NSA

    Justin_NSA

    Joined Jul 7, 2004
    4,535 posts, 672 likes
    Hunter 30T
    US Cheney, KS
    I just removed my hooded vent with a mushroom. Even though I thought I was cleaning my old vent, it still had spider 'crap' up inside after I removed it. The mushroom is much easier to maintain airflow.
     


  7. Peggie Hall HeadMistress

    Peggie Hall HeadMistress

    Joined Dec 2, 1997
    6,761 posts, 471 likes
    - -
    US LIttle Rock
    And it provides a way to prevent vent blockages: just stick a hose nozzle up against it and back flush the vent line every time you wash the boat.
     


  8. sgoldman01

    sgoldman01

    Joined Apr 11, 2018
    3 posts, 0 likes
    Catalina 30
    Peenhonin US Waukegan Il
    On the topic of the Fresh Water tank vent. We are located on Lake Michigan, not to say that the water is perfect. Would creating a loop in the hose prevent water from entering the tank. That is the location that has suffered the most leakage and I would rather just seal it all up.

    Thoughts?
     


  9. Peggie Hall HeadMistress

    Peggie Hall HeadMistress

    Joined Dec 2, 1997
    6,761 posts, 471 likes
    - -
    US LIttle Rock
    The usual "vent" thru-hull is designed to keep water out of the vent, but it's not uncommon to also find a loop--just an arch in the line, not a vented loop--in fuel and water tank vent lines too. So whether a loop is needed or not, it can't hurt. Just make sure the loop is high enough to stay above waterline at max heel. (NONE of this applies to waste tank vent lines, ONLY to fuel and water tank vent lines!!)
     


  10. sgoldman01

    sgoldman01

    Joined Apr 11, 2018
    3 posts, 0 likes
    Catalina 30
    Peenhonin US Waukegan Il
    Does anyone recognize what these screws are screwed into. I believe that it is below the rub rail.
    Steve Goldman
    Peenhonin
    1986 Catalina 30 TRBS
    Waukegan Il.
     

    Attached Files:



  11. Peggie Hall HeadMistress

    Peggie Hall HeadMistress

    Joined Dec 2, 1997
    6,761 posts, 471 likes
    - -
    US LIttle Rock
    They look like pins for canvas snaps.
     


  12. Hayden Watson

    Hayden Watson

    Joined Apr 5, 2009
    507 posts, 102 likes
    Catalina '88 C30 tr/bs
    US Oak Harbor, WA
    If I am seeing it correctly, those are the screws that connect the aluminum rub rail extrusion and is part of the hull / deck joint.
     


  13. Ward H

    Ward H

    Joined Nov 7, 2011
    1,727 posts, 166 likes
    Catalina 30 Mk II
    US Barnegat, NJ
    I agree with Steve, they are below the rub rail and do not show on the outside of the hull.
    They appear to be holding the back wall of the cabinet to the hull and only show in the cabinet when looking at the starboard side. That back wall is part of the inner liner.
    I'll try to get some photos this weekend.
     



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