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Old 03-19-2011, 09:24 AM   #1
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Bypass Waste Tanks

My new trailer will be left on a private lot with sewer access. Is there a way to bypass the waste holding tanks, and go directly into the sewer?
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Old 03-19-2011, 09:32 AM   #2
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You could redo the plumbing, but why not just leave the existing valves open. I would leave the gray water open, & dump the black tank as needed. This will allow you to have a trap to keep odors from entering through the toilet.

Good Luck!
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Old 03-19-2011, 09:43 AM   #3
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The primary reason you can't keep the black tank valve open is that solids will accumulate if there are no liquids to carry them out as happens when you drain the tank. If you leave the black tank valve open, the liquids will drain, but the solids will stay in the tank.

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Old 03-19-2011, 09:46 AM   #4
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A better explanation is needed. You cannot bypass the black tank or leave the valve open because the solid waste will not keep flowing across the bottom of the tank and all the way out the hose to the sewer connection. The solids get left behind and build up in the bottom of the tank. The slope on these things needs to be perfect and it takes a lot of water to keep things flowing. So, you must collect the waste and dump once in a while, flushing with a toilet or bucket full of water to get the solids to move. This does not happen in the grey tank and they can be left running. However, those of us who live in RV's collect grey water before we dump the black tank, so we can use it to flush the hose after dumping the black tank..
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Old 03-20-2011, 09:23 AM   #5
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I believe he OP just wanted to bypass the black tank. In most cases, if not all, the toilet dumps directly down into the tank which would probably require the removal of the black tank. It wouldn't hurt to just leave the grey tank open.
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Old 03-20-2011, 07:02 PM   #6
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We have a TT on a permanent site and use the proceedure above:
Gray open except when dumping the black. Black gets dumped prior to leaving.
The 45 degree clear elbos with the nubs cut off will fit right into a 3" no-hub
rubber connector and you can connect to the park sewer with solid ABS pipe
for no fuss flushing etc.

Housted
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