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Old 07-14-2011, 04:42 PM   #51
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If you decide to go this route, they make a bayonet fitting gate valve for the end of your dump mast. That way the cap gush issue will not be a problem. You just hook up your hose to the gate valve; then open it. Dump in the normal rotation.

Perhaps this mod is on the person's camper who suggested your work around.

Valterra Replacment RV Holding Tank Valve T58=

Clamps on the end of your dump mast and your cap/hose goes on the opposite end.
Thanks !! That looks like good cheap insurance. Its making the idea look better
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Old 07-14-2011, 05:05 PM   #52
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we stay a week each aug at a campground that doesn't have sewer. i purchased a 28 or 32 tank that i fill each day with grey water and pull a couple blocks by a marina, up a hill to a dump station. after the first pull, i got over any potential i had toward being embarrassed.
in the past, i have opened between the two grey tanks and run water between them. would not consider moving into the black tank. the black tank will make the week without problem.
i don't think i can make more than 2 days on the grey tanks w/o dumping.
my wife didn't understand the concept of a navy shower. she took it to mean like buying a toilet seat for $20000...thus use more water. i had to find another way to explain it to her.
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Old 07-14-2011, 05:16 PM   #53
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I see the "equalizing" method done quite often at NASCAR races, as people try to NOT have to pull out to dump, or pay the high fee for the honey wagon. Wife and I both enjoy our showers, so I just plan on dumping grey at least once (or twice) over a long weekend.

At Dover, where we go annually, it's more than a mile to the dumpsite, over some very bumpy gravel roadways, then over some open roadway, so towing a tank isn't really a viable option. I put my tote tank on my tailgate and use a macerator pump to fill it. My black holds 32 gallons, and my tote 40, so I always have room for 8 gallons {minimum) of grey flush water.

When I get to the dumpsite, I connect the discharge hose, just stand the tank up, and let gravity do it's thing. The tank drains well from 3' above the ground!
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Old 07-14-2011, 06:08 PM   #54
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...

Personally, I would rather drag a full 40 gallon tank once, than a 20 gallon tank 3 times. Why three? There is no way to gauge 1/2 a tank when dumping. If you try for a "full" Blue Boy, I guarantee you will miss (over) once or twice. Well once anyway. I don't know about you, but there would never again be a twice. There is no "nice" way to disconnect without a mess when the dump mast and hose are full of poo.

...That cold beer afterwards can't come soon enough for me.
So if I use just a 10 gallon blue boy and make multiple runs, I could get 4+ cold beers?
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Old 07-14-2011, 06:22 PM   #55
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So if I use just a 10 gallon blue boy and make multiple runs, I could get 4+ cold beers?
Now you are thinking correctly.
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Old 07-17-2011, 12:12 PM   #56
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Well by Saturday night our gray was full and black nearly empty as usual. With the sewer cap in place I opened the gray then opened the black and you could see the black level slowly rise. When I was satisfied with the level in maybe 1.5 minutes I closed the black then the gray. 2 more showers and dirty dishes later still room in the gray. Then this morning I ran the sewer hose to the dump hole and unscrewed the garden hose cap on the TT sewer cap and the gray in the manifold gently poured into the sewer hose I was holding under it. It appeared to be 100% gray water. They I removed the sewer cap and drained tanks as normal. I say it was a success and would not hesitate to do it again !!
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Old 07-17-2011, 12:31 PM   #57
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Well once again the Forum pays off. I would have never even considered it. While I doubt I would ever actually do it; it is nice to know that I could. Since my camper's sewer cap does not have a hose connection, I think I will be buying that screw on valve just to throw in the spares box. It would allow me to get home with a leaky main dump valve without a real mess.
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Old 07-17-2011, 12:40 PM   #58
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Yes..Without the forums numerous veteran campers to learn from I might be walking around the campsites more stinky than usual from lack of showers
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Old 07-17-2011, 04:03 PM   #59
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Someone else posted here that he does it with no problems.
I've known many people to skydive without issue. I know one person that had an issue. It's rare, but it'd darned unpleasant when it happens

So just because someone got away with it, does not mean you will.

You say "appeared to be only gray water" - that's because you can't see bacteria with the naked eye. Whether this becomes an issue long term or not I can't say. Some things that go down your sink - soaps, cleaners, etc - may kill the good bacteria or chems you have in your black tank causing issues. Campers have separate tanks for some reason. I can only assume the engineers that to this for a living know more about it than I do.

If you're not sure about this go watch the scene in RV where he first trys to dump his tanks. That could be you!


In case you wanted to know...a friend and experienced skydiver packed his GF's chute, which failed to open. She impacted the landing area as he watched with friends.
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Old 07-17-2011, 05:00 PM   #60
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Like others have posted holding tanks are merely that...holding tanks. If you think it operates the same as a septic tank, they dont. I didn't see a leech field under my TT. Both tanks are germ pools. Most chemicals people add are to mask oder, nothing more. You can add double or triple what they say to use of chemicals and most of what goes in, comes out the same, sans toilet paper, that disolves, two days later. The sewer hose is a log flume ride. lol.
Adding to your skydiving analogy, I admire people who jump out of perfectly good airplanes but I bet somebody told the Wright brothers they shouldn't do it too. That they were crazy. I guess what it comes down to is you do what works for you and I do what works for me..


Oh and RV was a great movie...funny !!
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