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Old 04-16-2008, 04:19 PM   #15
Rivet Master
Elgin , Texas
Join Date: Jan 2004
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Originally Posted by Chuck
yeah, that IS radical. really, there's not that much room. I kinda like the idea of using "gravity" to empty the my experince, it almost always works. electrical devices...not so much.

but along the same line of thought: what you could do is leave the existing setup, valve and all...add a tank underneath, with the existing dump tube emptying into it. Leave the dump valve closed. when the existing tank fills, pull the dump handle to transfer the contents into the sub-tank. Then close up the valve, and start again., then you'd have a venting problem. this is getting silly!
I guess for those trips where you know you're going to be parked for a while you could pack along a second tank dedicated to those "contents". With just the two of us, we can squeeze about 5 days worth into our tank before it has to be emptied. I've seriously considered designing and constructing such a tank - maybe constructing a frame out of square aluminum tubing that you could lay a pre-made poly tank in - complete with dump valve at lowest point. Maybe mount pneumatic dolly tires on it, with a means to tow it behind the truck. The whole thing would sit low enough to the ground so that gravity can do its thing between the trailer and the tank...


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Old 04-16-2008, 04:26 PM   #16
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1973 23' Safari
North of Boston , Massachusetts
Join Date: May 2002
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I think they call that a "blue-boy"....


Wbcci: 3752
'73 Safari 23'
'00 Dodge Ram 1500 4x4 QC
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Old 04-16-2008, 04:32 PM   #17
Rivet Master
Elgin , Texas
Join Date: Jan 2004
Posts: 800
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Originally Posted by Chuck
I think they call that a "blue-boy"....

Except that this one would be a "some other color Boy" Maybe "Brown Boy?"

Most of the current BB choices (like three, maybe) seem to come up a little short in design and long in price for what you get. I figure even if I end up spending $100 more creating my own, I'm going to get something that's more, uh, user-friendly...

Anyhoo, it's a thought!

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Old 04-16-2008, 05:43 PM   #18
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1972 25' Tradewind
Madison , Wisconsin
Join Date: Apr 2005
Posts: 396
My old 72 only has a 14 gallon black water tank. The grey is drained right on out. I keep 3 15 gallon blue boys. One for the black water, and tow for grey water. I like the 15's as they are easy enough to pull up the fold up dog ramp into the back of the pick up.

I thought about modifying the drainage plumbing. Then I looked into the additonal frame work plus additional plumbing work, not to mention getting a couple of different tanks.....enough is enough. (I am redoing plumbing now) I decided that the three blue boys wouldn't be too bad of a solution.

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