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    Sanitation tank filter-gctid803604

    My thru hull vents for my sanitation tank are plugged up with salt and etc, so I replaced them this morning. In the process I noticed there is an inline sanitation tank filter on one of the hoses leading to one of the vents. I looked at replacing the filter as I am sure it is atleast 4 years old and discovered they are pretty expensive which leads me to wonder if I should eliminate the filter. Do they actually work and is it worth replacing?

    Thanks. Jamie
    1997 4788 w/Cummins
    Boston Whaler 110

    #2
    Jaime,

    From talking to a very experienced buddy of mine, the filters do work at eliminating odors; he actually fabricated one out of PVC and filled it with carbon, (much cheaper than buying one). I have one installed in my 3988 and I'm also wondering if I should replace it or eliminate it. If you read Peggie Hall's, (The Headmistress), book, she's against anything that restricts the tank vent and is not a fan of these filters. She even recommends increasing the size of the vent line; a blocked vent line is one of the worst things for your sanitation tank. If you haven't, you should pick up her book; it's excellent information. It's available on Amazon. Good luck!
    Alex
    Orange County, Ca.
    2001 3988
    Twin Cummins 330's

    Comment


      #3
      Thanks Ahaua. I'll definitely pick the book up. She does make a good point. I may just bypass and if I have an odor problem I can easily put it back.
      1997 4788 w/Cummins
      Boston Whaler 110

      Comment


        #4
        Mine is over 10 years old. No need to replace it unless it gets wet.
        1989 26' then 1994 32' now 2001 39'

        Comment


          #5
          I took it off and inspected. It definitely was obvious the tank was over filled at some point prior to me buying. I just replaced the vents and all the lines.
          1997 4788 w/Cummins
          Boston Whaler 110

          Comment


            #6
            Easy to tell if you really need it: have someone flush one of the heads while you stand outside by th vent. You'll know soon enough.

            It's amazing how the activated carbon filters take away all the smell from the vent. As someone has mentioned, you can take your old filter, cut, modify And refill it for about $15. Lots of threads on this. Parts from Home Depot and charcoal from a pet store.

            The other alternative is something like Noflex digester, which is a great treatment for holding tanks.
            Mike
            "Allante I" Rayburn 75
            Previous: '97 4788

            Comment


              #7
              I have a 28 gallon tank in my boat with a one inch vent line and I never have a odor issue.

              I also us Noflex digester.
              1999 Bayliner Ciera 2655
              5.7 Bravo 3

              Comment


                #8
                If you haven't looked at the tank vent fitting you might want to check it.

                This is a photo of mine.


                Comment


                  #9
                  I took our filter out to modify with replaceable carbon. While it was out We really did not notice a difference. That was over a year ago. We use noflex and all seems to be well. I've got it ready to go to reinstall if necessary.
                  2000 4788 w Cummins 370's, underhulls, swim step hull extension
                  12' Rendova center console with 40HP Yamaha
                  MV Kia Orana
                  Currently Enjoying the PNW

                  Comment


                    #10
                    I also use NoFlex Digestor and it really does work well. I replaced the inline charcoal filter with a reusable { replaceable charcoal } from " The Big Orange "

                    https://bigorangefilter.com/

                    I like the design in that it has a bypass valve to allow for air to flow when using a pump out. I added larger hoses and a simple 3/4 inch mushroom vent fitting.

                    Best of all , the company in in Canada, so for my northern brethren , the wimpy $Can buck goes further.

                    Cheers, Gary
                    Afterglow 4788
                    Gary Weiss
                    Sidney BC
                    ArbutusCoastYachts.com

                    Comment


                      #11
                      The head 1" hose for electric toilets often gets plugged with calcium, I just run a hand crank drain pipe cleaner and crank away until it hits the holding tank, then work it back and forth, this knocks all the calcium out with-out buying a new hose and the trouble of installing a new hose.
                      Pat says: DO-IT-RIGHT THE FIRST TIME!

                      Bayliner 3870 "ALASKA33)
                      Twin 350 GM power
                      Located in Seward, AK
                      Retired marine surveyor

                      Comment


                        #12
                        I currently have an in line carbon filter installed and have been concerned about damaging the holding tank when pumping out due to the filter restricting air from entering the vent. I just looked at the Big Orange filter Gary posted and I really like that it has a by pass valve that can be used at pump out; I'm going to buy one and replace mine...thanks for posting Gary!
                        Alex
                        Orange County, Ca.
                        2001 3988
                        Twin Cummins 330's

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                          #13
                          The filter is designed for air flow as long as it never gets wet from overfilling.
                          1989 26' then 1994 32' now 2001 39'

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                            #14
                            I made one of those filters and it didn't make any difference. Tried the No Flex and that didn't work either. Regular flushing of the tank and the blue rv treatment seemed to work best.
                            "Martini's Law"
                            1986 Bayliner 3270, 110 Hino's
                            Nova Scotia, Canada

                            Comment


                              #15
                              I too installed a big orange in my 3055

                              Worked instantly, no more dirty smells

                              My favourite mod to the boat

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