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  1. #1
    Join Date
    Oct 2007
    Location
    Belgium
    Posts
    4,871

    Default when and where to dump the black tank ?

    the thread from LJS gave me the trigger to post this question,

    Our black tank is just (or just not) big enough to keep toilet holding for one day.
    Normally we always’s dump the tank when leaving a marina / anchorage,
    But sometimes we stay multiple day’s in one place,
    Usually swmbo dumps the tank on the anchorage or in the marina before she goes to bed (pump command switch with a timer)
    And sometimes she forgot

    We just finished a holiday period during witch we had a couple of weeks with a full boat,
    the tank was often full before the end of the day,
    so we had to make sure to dump the tank, when no-one wants to swim, or move to another anchorage, and dump during the trip..
    which was enoying sometimes..

    when / where do other med boaters dump their black waste ?
    any good tips ?

  2. #2
    Join Date
    Feb 2008
    Location
    Farndon
    Posts
    3,048

    Default Re: when and where to dump the black tank ?

    Sounds like you need a bigger tank.

  3. #3
    Join Date
    Feb 2015
    Location
    Conwy
    Posts
    4,193

    Default Re: when and where to dump the black tank ?

    I'm surprised you cant hold for more than a day. You must have a lot of crew. For 4 of us on a 34 foot boat we can hold for about 8 days continuous use. I dont pump out on anchorage but normally make a quick stop on the return journey to pump out. I once had a problem with a stuck mascerator pump and took my chance while at anchorage a couple hundred yards from the next boat to clear it. Wouldn't you know, just as I cleared it and it started to work I heard a shriek from outside. I popped my head out from the engine bay to see our neighbours had swum over bearing gifts. The embarrassment was tangible, dont go there!

  4. #4
    Join Date
    Mar 2008
    Location
    Me Cheltenham, boat Sant Carles de la Rapida
    Posts
    501

    Default Re: when and where to dump the black tank ?

    I would only ever pump out directly into the sea if at least 3 miles from the shore.

    Graham
    Light travels faster than sound. This is why some people appear bright until you hear them speak.........

  5. #5
    Join Date
    Sep 2011
    Posts
    2,262

    Default Re: when and where to dump the black tank ?

    Don't know why but i always thought it was illegal to pump out unless you were 12 miles from shore.

  6. #6
    Join Date
    Sep 2011
    Posts
    2,262

    Default Re: when and where to dump the black tank ?


  7. #7
    Join Date
    Sep 2011
    Posts
    2,262

    Default Re: when and where to dump the black tank ?


  8. #8
    Join Date
    May 2001
    Location
    ation, Loc: ation, Loc: ation.
    Posts
    16,527

    Default Re: when and where to dump the black tank ?

    Quote Originally Posted by BartW View Post
    the thread from LJS gave me the trigger to post this question,

    Our black tank is just (or just not) big enough to keep toilet holding for one day.
    Normally we always’s dump the tank when leaving a marina / anchorage,
    But sometimes we stay multiple day’s in one place,
    Usually swmbo dumps the tank on the anchorage or in the marina before she goes to bed (pump command switch with a timer)
    And sometimes she forgot

    We just finished a holiday period during witch we had a couple of weeks with a full boat,
    the tank was often full before the end of the day,
    so we had to make sure to dump the tank, when no-one wants to swim, or move to another anchorage, and dump during the trip..
    which was enoying sometimes..

    when / where do other med boaters dump their black waste ?
    any good tips ?
    Bart, I don't believe I'm writing this, but as I understand it, the average amount of water passed by a person per day is between 1 and 2 litres. So if you have 10 people on board they should only be passing 20 or so litres per day (plus solids!). Therefore I'm wondering if you're toilets are using too much water when flushing the loos?

  9. #9
    Join Date
    May 2001
    Location
    Broken Brexit Britain
    Posts
    55,359

    Default Re: when and where to dump the black tank ?

    Quote Originally Posted by BruceK View Post
    I'm surprised you cant hold for more than a day.
    Me too. He must have guests onboard who shit a lot. All that Belgian beer I suspect. Personally, I have never dumped our holding tank overboard in an anchorage and only ever do it when we are well offshore. I am always lecturing guests though on the use of the electric toilets to try to ensure that flushing water usage is kept to a minimum

  10. #10
    Join Date
    Feb 2007
    Location
    Poole, Dorset
    Posts
    944

    Default Re: when and where to dump the black tank ?

    Quote Originally Posted by MrB View Post
    But good practice, not a legal requirement.

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