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macerator to rv dump

 
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slowtrot



Joined: 18 Jul 2012
Posts: 47
City/Region: dawsonville
State or Province: GA
C-Dory Year: 2006
C-Dory Model: 19 Angler
Vessel Name: Dabbler
PostPosted: Tue Oct 09, 2012 6:46 pm    Post subject: macerator to rv dump Reply with quote

I have a 25 CD and I wanted to be able to not only have the holding tank pumped out at a marina, but wanted to be able to dump at my house or at an rv dump station. And I did not want to take a poo shower trying to hold up a compression hose.

I could not find a hull thru fitting with 3/4 tapered pipe threads. The standard fitting on the boat looks to thin to me to simply run a pipe tap into it.


So, I bought a pvc 1/2" female tapered thread to 3/4 bushing and turned it on my wood lathe to a slightly smaller external diameter than the standard thru hull waste fitting on the boat. I filed off the anti spin ears in the standard thru fitting and roughed it up with sandpaper. I then used JB weld to glue the pvc 1/2 bushing flush nto the boat fitting.

Now I have 1/2 threads inside the standard discharge fitting and I screw in a short 1/2 nipple clamped to a clear hose and can pump away with the macerator pump. The hose is stored on the trailer inside of one of the square tubes.

No runs , no drips, no errors, and since I had a hose, the solution only costs me a dollar.
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Dreamer



Joined: 01 Jan 2006
Posts: 1763
City/Region: Really Sunny SaddleBrooke
State or Province: AZ
Photos: Dreamer
PostPosted: Tue Oct 09, 2012 9:45 pm    Post subject: Reply with quote

Very Clever! Like to see photos..
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Once a C-Brat, always a C-Brat

Dreamer- Sold 25 Feb. 2013
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JamesTXSD



Joined: 01 Mar 2005
Posts: 7444
City/Region: from island boy to desert dweller
State or Province: AZ
C-Dory Year: 2007
C-Dory Model: 25 Cruiser
Vessel Name: "Wild Blue" (sold 9/14)
Photos: Wild Blue
PostPosted: Tue Oct 09, 2012 9:47 pm    Post subject: Reply with quote

Dreamer wrote:
Very Clever! Like to see photos..


Indeed - do show!
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thataway



Joined: 02 Nov 2003
Posts: 20778
City/Region: Pensacola
State or Province: FL
C-Dory Year: 2007
C-Dory Model: 25 Cruiser
Vessel Name: thataway
Photos: Thataway
PostPosted: Wed Oct 10, 2012 12:09 pm    Post subject: Reply with quote

Great idea...
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Bob Austin
Thataway
Thataway (Ex Seaweed) 2007 25 C Dory May 2018 to Oct. 2021
Thisaway 2006 22' CDory November 2011 to May 2018
Caracal 18 140 Suzuki 2007 to present
Thataway TomCat 255 150 Suzukis June 2006 thru August 2011
C Pelican; 1992, 22 Cruiser, 2002 thru 2006
Frequent Sea; 2003 C D 25, 2007 thru 2009
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Home port: Pensacola FL
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starcrafttom



Joined: 07 Nov 2003
Posts: 7878
City/Region: marysville
State or Province: WA
C-Dory Year: 1984
C-Dory Model: 27 Cruiser
Vessel Name: to be decided later
Photos: Susan E
PostPosted: Wed Oct 10, 2012 4:47 pm    Post subject: Reply with quote

photos and where do I place my order? I really need one of these.
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http://tomsfishinggear.blogspot.com/
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slowtrot



Joined: 18 Jul 2012
Posts: 47
City/Region: dawsonville
State or Province: GA
C-Dory Year: 2006
C-Dory Model: 19 Angler
Vessel Name: Dabbler
PostPosted: Fri Oct 12, 2012 9:21 am    Post subject: fitting details Reply with quote

I bought the pvc plastic bushing at Home Dbgepot. ( 438-101HC 3/4" X1/2" flush bushing SPIGx RFPT.) I think this translates as a slip fitting for the internal application with glue to the inside of a pvc 3/4" pipe with female 1/2" recessed tapered pipe threads on the inside.

The bushing is round for most of its length but it has 8 flats at one end so that it can be held with a wrench when a pipe is installed. The flats need to be sanded off and the diameter of the fitting reduced so that it can be inserted into the standard thru hull waste discharge fitting. I turned down mine on a wood lathe but you could sand or file it by hand.

Then file off the anti turn pieces in the thru hull fitting, rough the internal surface of it so that the glue has a bite and glue in the bushing. Make sure the right end faces outside!

Now you will have 1/2" female threads in the standard fitting. You can screw in a pipe nipple and clamp a hose on it.

hope this helps
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