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Old 11-08-2012, 11:18 PM   #1
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Need help plumbing drain hoses on 2 bath 5th Wheel

Need help plumbing my 2008 Chaparral Coachmen Fifth Wheel, Model 299TBSB it has a front and rear bathroom so I need to figure out how and what I need to plumb it properly...we will be living in it for a while so the setup will be that way for a while but still taken out on the road a few times out of the year.

Was thinking of getting to hoses and a y-pipe fitting and going from there...thanks for any suggestions and maybe some links with pics would be great too

KC
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Old 11-09-2012, 07:07 AM   #2
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You can do that and it will work if you can keep it off the ground and pitch it downward to the hole that even better you can Y it at the hole too if it's easier to do it that way any way is good
Just get the POO in the hole
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Old 11-09-2012, 10:27 AM   #3
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check the sewer line accessories on RVUpgrades.com. i have seen many coaches using that setup and the items are standard off the shelf products.

You'll need 3 hoses and a Y connection.
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Old 11-09-2012, 10:29 AM   #4
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Quote:
Originally Posted by nightriderrv View Post
You can do that and it will work if you can keep it off the ground and pitch it downward to the hole that even better you can Y it at the hole too if it's easier to do it that way any way is good
Just get the POO in the hole
Couple more questions...

1. I have heard that you do not want to leave the valves open all the time but open them when full and lastly flush the gray water to keep the lines clean, true?

2. Any diffrence in draining procedure when a 2nd sewer tank is involved?

3. Since the half bath has a sink does it drain into the second sewer tank or is it plumbed to the single gray water tank?

Thks, KC
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Old 11-09-2012, 06:52 PM   #5
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Keep the black tanks closed till it's time to empty or you will get the pyramid not the one like in Egypt, when you plan on dumping close the Grey and let it start to fill so it can rinse the hose.

No different in the drain procedure black 1st then Grey last to flush line.

How many valves are there for the half bath I get it that it has a black so it might have a smaller Grey tank like the size of a galley sink tank I would not think they would plum it to the black
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Old 11-09-2012, 06:54 PM   #6
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You're right on keeping valves closed. Open valves allows liquids to flow out, but not solids. You'll clog the tanks up pretty quick. So you let them fill mostly full, while still using proper chem packs, and then drain the black tanks so everything flows out. I'd drain just one at a time. And as far as the gray tank flushing it; you can do that. Most do. But it's not really necessary.
On dual bath trailers, I think the rear lavy faucet drains into the rear black tank.
But just test it. Drain out all the tanks. Run only the faucet in question for a while, then open each tank drain individually. Where ever you get water, that's the tank it drains into.
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Old 12-03-2012, 04:17 PM   #7
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Thanks for all the help guys!
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