Sink Questions - Fiberglass RV


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Old 04-20-2003, 08:22 AM   #1
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Sink Questions

I took this photo because I could not figure out why there were two drain lines to the outside from the kitchen sink of my Sufside. this is the only water place in the trailer so it's not connecting another drain. The short drain goes straight outside and the larger fatter drain goes under the bed then out the back wall. Does anyone know why there would be two? Do I need to do this back this way, or can I go to one?
<img src=http://www.fiberglassrv.com/board/uploads/3ea29ecaaf500drain.jpg/>
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Old 04-20-2003, 08:24 AM   #2
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also of interest is the elbow under the sink. I didn't know they made these.
<img src=http://www.fiberglassrv.com/board/uploads/3ea29f81ce93fsnkdrn.jpg/>
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Old 04-20-2003, 08:55 AM   #3
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sink drain

:wave Sink drains should be teed into a drain pipe near the sink, one end of the drain pipe will be vented to the atmoshere(thru the roof)and the other end will dump the water where you want it to be dumped,this prevents a gurgling sound and a slow draining of the water when leaving the sink. Just underneath a sink,before it is teed into the drain pipe will be a (trap),this prevents fumes from exiting up thru the sink,keeping the fumes in the drain pipe to exit at the highesr point of drain pipe(atmosphere).Hope this helps:O
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Old 04-20-2003, 09:14 AM   #4
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Roy

Thanks. Funny, before I read your post I was :conf like Jana. Of course you are correct. It won't drain without the air vent. Mine was even slow when those pesky mud daubers closed up my vent pipe!
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Old 04-20-2003, 09:25 AM   #5
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Thanks Roy, BUT Roy,???
I forgot to tell you this is looking down into the under sink area. I might have thought that had the short one been higher, but it looked like it would run out both at the same time. I knew if I ran it into a tank, I would need a vent, but to just dran outside?? well, Okay. I'll put it back, but it sure sounds strange to me. :wak. Thanks again
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Old 04-20-2003, 09:31 AM   #6
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Two drains???

I thinkthe longer hose should be pulled up close to the top of the counter so the water won't drain down it.
you know, like a vent line, if it is higher than the other line it lets air in, so you get a fast drain.

This is similar to what I found on my first trillium, which did not have a roof vent for the plumbing.
Too bad the original owner never thought to clean the drain once in a while, it would have drained much better. (My trailer that is)

I can't tell for sure by the picture, but is that a hose barb on the side of the elbow, or is that your drain connection? If it's a hose barb use it to connect to the roof vent line if you can hide it in behind the cabinets somehow. you can get a check valve for almost any size hose which would prevent water from running into the vent pipe, but allow air to get into the system for faster draining.
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Old 04-20-2003, 09:38 AM   #7
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Oh!! the short one is where the water drains. :omy
now I get it. that's why the larger one had these brackets.(not that the hose was in them) I thought, hows the water going out that with it up so high. that was the air one. thanks for the lesson guys. :lol
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Old 04-20-2003, 09:39 AM   #8
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Drains

Hi...I believe that if you were draining by solid hookup into a holding tank or were connected to a sewer system then like you you would need a vent (which prevents you from emptying other traps in the system) and a trap to prevent sewer gas from backing up through your sink. If your sink is the only drain connected to that line and you drain into a pail or whatever outside then the vent and the trap become redundant (useless), unless a trap would stop insects from coming in through the drain. Does this make sense??? Benny
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Old 04-20-2003, 09:46 AM   #9
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:yep yep. Glad to know all my thinking wasn't so far off. Thanks Benny
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Old 04-20-2003, 10:27 AM   #10
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Jana
That second photo of the thingy under the sink, is the part on our Trillium that was cracked. We couldn't find anything like it in new. It only came off in pieces and we replaced it with a new metal bar sink drain.

Make sure your doesn't leak. We only discovered our's was leaking after the furnace was removed which was after all the windows were resealed and we still got water in the trailer.
Nancy
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Old 04-20-2003, 10:41 AM   #11
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Jana
Me again! I just went out and looked at ours. We don't have a vent on the drain. Hmmm, wonder if we just didn't put it on when we replaced the drain thingy and drain hose, or if it never had one on it from new. Betting it never had one.

I wouldn't say ours drains terribly slow, but then we don't use it very often.

Now I'll have to go out and pour a bucket of water down it and find out.
Nancy
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Old 04-20-2003, 10:45 AM   #12
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Quote:
Orginally posted by Thomas and Janifer

also of interest is the elbow under the sink. I didn't know they made these.
<img src=http://www.fiberglassrv.com/board/uploads/3ea29f81ce93fsnkdrn.jpg/>
They still make a similar item. It is a rv sink drain trap.

- Ray
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Old 04-20-2003, 10:53 AM   #13
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Hi Ray

When we needed to replace ours, there was none to be had. Are they an older item or still used? When we asked at our local dealer they seemed to have no clue about it but then that can be a typical reply as soon as its mentioned that it's from a 75. Too old to bother with seems to be the way some of them think!

Nancy
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Old 04-20-2003, 11:04 AM   #14
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Answer

Nancy:

Yes. Still made. Still available. I'm not sure about cost. But they are $5.00 or $10.00. I searched google, and looked at dyers to see if I could find a photo of it...they didn't carry it. I have bought a few at a place called Arrow Distributors, a local RV ditributor. There is a tiny thumbscrew at the bottom, to undo for winterizng to keep the drain from freezing, and then busting apart.
- Ray
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