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Author Topic: rear toilet to tank run?  (Read 2481 times)
Rick 74 MC-8
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« Reply #15 on: September 20, 2010, 02:54:46 PM »

Bob
         
        My coach came with a rear toilet standard RV type it was an entertainer coach converted by Executive coach in Fox River Grove IL. It ran about 8' to the black tank the only problem once in a while after the lady's used I would fill the bowl and flush could hear it splash and knew it was good. My advice Go for it it will be fine.


                                                                                       Rick 74 MC-8
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wal1809
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« Reply #16 on: September 20, 2010, 06:28:07 PM »

For thems that run the sink and shower drains to the dookie pipe, how do y'all keep the smell from creeping up the drain pipes in the sinks and shower drain.  The toilet has a flapper buth the sinks are straight pipe.  Do yall put a trap or just live with it?
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« Reply #17 on: September 20, 2010, 06:32:01 PM »

For thems that run the sink and shower drains to the dookie pipe, how do y'all keep the smell from creeping up the drain pipes in the sinks and shower drain.  The toilet has a flapper buth the sinks are straight pipe.  Do yall put a trap or just live with it?

Have to have a P-trap on them.  Even on those that use a separate gray tank, gray water from a kitchen sink can sometimes smell as bad or worse than black water.
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gus
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« Reply #18 on: September 21, 2010, 03:08:06 PM »

Amen, you sure don't want to have any drain without a trap.

Sometimes traps will be sucked dry when dumping the waste tank, it doesn't take very long to notice either!!
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« Reply #19 on: September 21, 2010, 03:15:00 PM »

Sometimes traps will be sucked dry when dumping the waste tank, it doesn't take very long to notice either!!

That's exactly why you need the proper sized tank vent.

If you don't replace the volume of liquid moving out with free flowing air, it will create a vacuum and your p traps are next in line.

Cliff
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robertglines1
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« Reply #20 on: September 21, 2010, 04:12:57 PM »

plan traps on all except toilets..and at least 3 ea 1 1/2 inch plumbing vents.  because of the spread out area of plumbing..Bob
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« Reply #21 on: September 22, 2010, 12:01:56 AM »

Bob -

Interesting challenge!

My comment:  Make sure you use "sweep ells" or two 45s together rather than a "straight ell".  Any competent supply house can show you the difference.  Sweep "wyes", too, where applicable.

A 2" straight ell has the same resistance to flow as seven feet of straight pipe.  A sweep ell reduces that down to three feet.  Big difference in efficiency.  (Two 45s equal about four feet.)  I know you're talking about using 3" ID, but the flow concept's the same.

FWIW & HTH. . .

 Wink
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RJ Long
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« Reply #22 on: September 22, 2010, 04:31:57 AM »

Our toilet is about 6' or so from the single tank. Every once in a while we have to double flush. Second flush fill the bowl then let 'er rip. When you hear the solids fall you're good! It has about a 2" fall with no el's.

All of our other drops have a p trap, shower and both sinks along with the drain for the washer/dryer.

We havn't dry camped yet, so that will be another experience in itself! Grin

Works for us!

Paul
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Becky and Paul Lawry, On The Road
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Our coach was originally owned by the Dixie Echoes.
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