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Aft holding tank vent

Discussion in 'Carver Yacht' started by nomad69, Feb 23, 2014.

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  1. Aimhii

    Aimhii Member

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    Sep 22, 2013
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    46
    Location:
    Port Severn
    I was referring to the Filter locations……
  2. nomad69

    nomad69 Member

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    Apr 13, 2013
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    82
    Location:
    Iuka, ms
    I never found an inline filter. The vent tube exits the hull with a through hull fitting on the port side.
  3. ScubaPete

    ScubaPete New Member

    Joined:
    Jul 28, 2011
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    6
    Location:
    Seaford, VA
    My 2002 406 Aft Cabin does not have filters on the vent lines from either holding tank. (Vac-u-flush toilets) I am adding home-made filters now filled with activated charcoal.
  4. MysticDolphin

    MysticDolphin Member

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    Nov 3, 2011
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    98
    Location:
    Lake Texoma
    take a short hose and see if you can blow from the vent to the tank.. just to see if it is clear.. i tend to find dirt dobbers mud in my vents.. usually can just wash them out...
  5. NYCAP123

    NYCAP123 Senior Member

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    Long Island, NY
    Vacu-flush toilets do have filters, unless someone cut it out. You might want to look again. In any case the idea of making your own filter is a good one. I just saw something on it. Very simple and costs about $5 instead of $80
  6. g36

    g36 Member

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    Aug 7, 2013
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    Location:
    chattanooga
    sorry but all vacuflush's do not have filters mine have not been cut out and 3 of my friends at my marina purchased their boats brand new from carver and none of theirs have any holding tank filters either
  7. NYCAP123

    NYCAP123 Senior Member

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    News to me. Thanks for the education. I'll have to check further.
  8. ScubaPete

    ScubaPete New Member

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    Jul 28, 2011
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    Location:
    Seaford, VA
    No, mine do not have filters. Absolutely certain. I have followed both vents from the tank to the external through hull vents. No filter. Never was a filter. Maybe they should have had filters but they do not. You cannot make absolute statements like you did, because each boat build is different. But that is changing as I am installing filters tomorrow.
  9. Capt J

    Capt J Senior Member

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    Fort Lauderdale
    It must smell LOVELY for about 100' around your boat when someone flushes one of the vaccuflush toilets.
  10. ScubaPete

    ScubaPete New Member

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    Jul 28, 2011
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    Location:
    Seaford, VA
    Maybe that's why we don't have any boating friends anymore!!! I think the new filters I am installing will help. Our boat is "A Pretty Penny". Occasionally it is called "A Poopy Penny".
  11. millswf01

    millswf01 New Member

    Joined:
    May 23, 2011
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    12
    Location:
    Summit North
    Head Flushing Waste

    I have a 1991 3607 aft cabin and still don't quite understand the Crown Electric head operations. I am good with replacing the pumps to flush the bowl but the actual flushing of the waste out of the bowl to the holding tank is inconsistent. Is it possible I have a clogged vent line on the holding tank or what might be the problem. If someone could explain the actual operation and why it might be slow draining to the holding tank. There are macerators for both heads and holding tanks which I assume are only to be used when outside coastline limits as required by the Coast Guard. I do have the Y valved locked to discharged the heads to the tanks, so I am legal there. Any help would be appreciated.

    Thanks,
  12. Pascal

    Pascal Senior Member

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    Feb 29, 2008
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    Location:
    Miami, FL
    The only reason more VF equipped boats have filters is that the filters are made by Sealand just like the heads. There is no reason why the type of head would affect whether or not you d put a filter on the vent. Tank and bacteria doesn't care what type of head is sending the waste in the tank.

    Filters will usually be installed as close to the vent and as high as possible to limit the odds of waste reaching it as when the charcoal gets wet it clogs up the vent.

    I have mixed feeling about vent filters. Yes, they reduce or eliminate unpleasant odors when a head is flushed but once clogged you can damage the tank as it will build pressure when flushing or collapse when pumping out.

    (all it takes is the tank being full just once to clog the filter and considering how unreliable holding tank gauges are and how hard it often is to find a working pump out, it s bound to happen.

    As to how easy it maybe to trace a hose to find the filter? It should be easy but accessibility is at the bottom at list when most boats are designed... They likely installed the vent line and filter before dropping the deck...
  13. Capt J

    Capt J Senior Member

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    Actually no. A boat with sealand pumps NEEDS the vent filter.......I removed one once, and when you flushed the toilet, the pump pumps so much air and water into the tank at one time, that it literally cleared out the entire backyard at the house it was docked behind........REALLY BAD odor out of the vent.
  14. Sea Ya

    Sea Ya New Member

    Joined:
    Sep 8, 2012
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    29
    Location:
    Beach Haven, NJ
    I have an 89 3607 with no filters and no smell. I use one of the enzyme treatments instead of the chemical deodorizers and all is fine for the past 5 years. My dock neighbors have attested to the fact that my boat does not flush any odor. The filters in my opinion are nothing but a maintenance nightmare. We have a built in pumpout system in our docks which pumps out my boat just fine and at the same time adjacent boats have a hard time pumping because of inline filters not allowing sufficient air back into the tank. Remove the filters and use the enzyme treatment and your world will smell like roses, or maybe daisies. Also check your vent line to make sure it runs uphill from the tank to the truhull., a little dip acts just like a trap in a sink.