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Pumpout - Trailerable boat with holding tank.-gctid383826

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    #1

    Pumpout - Trailerable boat with holding tank.-gctid383826

    I have a 1993 2452 Classic. It has a holding tank. I store the boat on the trailer, and go to and fro on my expeditions using the trailer. I found it was difficult to find a holding tank pumpout at many launch locations, and at home there was no good way to pump out the holding tank. What I really needed was a way to use the trailer dump stations at the state parks and roadside rest areas.

    Here is what I did. I stuck a piece of pipe in the outlet of the macerator, one of those white thru hulls. It looked like a 3/4" NPT pipe was a pretty close fit. So I went online and bought a 3/4" NPT tap. It was about $15 including shipping from here: http://drillsandcutters.com/DWTPT3/4...bon_steel.aspx

    Using a little WD40 and an adjustable wrench I cut threads into the thru hull. It worked great. I bought a 3/4" male NPT thread/1" push on hose nipple combo from Lowe's in that gray plastic material. 15' of plastic tubing. Now I can pump it out myself. If the cleanout on my sewer were closer to the driveway I could probably do it at home if necessary.

    This was a very inexpensive project, and I think worthwhile for those of us trailering boats with holding tanks.
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    #2
    I did something similar but didn't cut into the through hull. Here is a pic, not elegant but very effective. The electrical tape provides an great seal.


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      #3
      Why did you use clear tubing? Gross!

      I did too, and I am thinking that the first time I actually use this it is going to gross me out!

      Thanks for the comment and the picture.

      Comment

        #4
        NickReynolds wrote:
        Why did you use clear tubing? Gross!

        I did too, and I am thinking that the first time I actually use this it is going to gross me out!

        Thanks for the comment and the picture.
        LOL. Yes it is a little gross, but It makes it easy to tell when I have flushed out all of the crap. I usually empty the tank, then fill with water then empty again and repeat as many times as it takes to get a clear liquid out of the hose. Then I rinse the hose too. Funny thing I can never get the admiral to help me out. She always has something else to do.

        Comment

          #5
          I found myself in the same situation as you guys. We go camping for about 2 weeks - no pumpouts!! But the camp site we stay at has sewer.

          I resorted to a similiar approach where I bought tubing, but silly me, I inserted the tubing into the VENT hole, not the macerator:surr, and then I use a siphon to get the flow started. And yeah, I too find it difficult to get anyone "free" to help - funny they have no problem filling, but won't help emptying.

          So with your setup - do you then turn the macerator on to drain the tank or do you just let gravity take over?

          Comment

            #6
            Robert K wrote:
            I found myself in the same situation as you guys. We go camping for about 2 weeks - no pumpouts!! But the camp site we stay at has sewer.

            I resorted to a similiar approach where I bought tubing, but silly me, I inserted the tubing into the VENT hole, not the macerator:surr, and then I use a siphon to get the flow started. And yeah, I too find it difficult to get anyone "free" to help - funny they have no problem filling, but won't help emptying.

            So with your setup - do you then turn the macerator on to drain the tank or do you just let gravity take over?
            Hmmm........ must be fun getting that siphon going. Don't suck on the hose for too long. Yuk!!!

            Once one end of the hose is inserted into the thru-hull fitting, and the other end is inserted into the sewer hole, we flip the macerator switch and pump it out. Then rinse the tank, then disconnect the hose rinse it out and store it. And you are right everyone else seems to have something else to do when it is tank emptying time.

            Comment

              #7
              NickReynolds wrote:
              I have a 1993 2452 Classic. It has a holding tank. I store the boat on the trailer, and go to and fro on my expeditions using the trailer. I found it was difficult to find a holding tank pumpout at many launch locations, and at home there was no good way to pump out the holding tank. What I really needed was a way to use the trailer dump stations at the state parks and roadside rest areas.

              Here is what I did. I stuck a piece of pipe in the outlet of the macerator, one of those white thru hulls. It looked like a 3/4" NPT pipe was a pretty close fit. So I went online and bought a 3/4" NPT tap. It was about $15 including shipping from here: http://drillsandcutters.com/DWTPT3/4...bon_steel.aspx

              Using a little WD40 and an adjustable wrench I cut threads into the thru hull. It worked great. I bought a 3/4" male NPT thread/1" push on hose nipple combo from Lowe's in that gray plastic material. 15' of plastic tubing. Now I can pump it out myself. If the cleanout on my sewer were closer to the driveway I could probably do it at home if necessary.

              This was a very inexpensive project, and I think worthwhile for those of us trailering boats with holding tanks.
              If you read about the real reasons boats sink you will find thru hull failure is near the top of the list.

              IMHO Running a tap into that nylon thru hull reduced it's strength.
              Jim McNeely
              New Hope a 2004 Bayliner 305 Sunbridge Express Cruiser
              Twin 5.7s with Bravo2 drives
              Brighton, Michigan USA
              MMSI # 367393410

              Comment

                #8
                2859er wrote:
                Hmmm........ must be fun getting that siphon going. Don't suck on the hose for too long. Yuk!!!
                That is just too funny and gross at the same time.

                No, It's a hand siphon - but even with that - it is still pretty gross - I won't go into the reasons why.

                Comment

                  #9
                  Jim, I am sure you are correct that the thru hull is reduced in strength. I don't believe it is significant, the threads don't cut in all that far, but I can't deny it is probably weakened. The major issue would probably be bumping it with something and breaking it off on the inside of the boat. It is quite high and protected, so that is unlikely.

                  But, the good news is that it is a foot or more above the waterline, so it can't cause the boat to sink. It is above the stripe, and just forward of the B in Bayliner on the port side that you see in my signature.

                  I do have a tapered plug stored near the one thru hull that is below the waterline in case of emergencies, it looks like it will fit this hole too.

                  Thanks for the comment.

                  Comment

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