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Old 09-10-2016, 12:03 AM   #1
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P trap replacement

I was at an RV show today and saw a Palomino A frame which is pretty much the same as Forest Rivers' but when I looked in cabinet under the sink there was no p-trap, just a small device attached directly under sink which did hold some water as a trap would. By eliminating the p-trap and keeping the water lines against the side wall this opened up the entire upper area under the sink for storage and by placing the water pump back against the side wall , it left the front half of lower area open for storage. The water filter is also eliminated which I have already done with mine. Does anyone know what type of device this would be and where to get it. I would like to do the same to mine. Attached is photo of this p-trap replacement.
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Old 09-10-2016, 12:55 AM   #2
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This might be it


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Old 09-10-2016, 10:02 AM   #3
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This might be it


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Looks like that's it! Thanks!
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Old 09-10-2016, 12:50 PM   #4
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Looks like that's it! Thanks!

No problem.


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Old 09-10-2016, 02:17 PM   #5
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P Trap really not needed

These A frames really don't need a P trap since the only "sewage" is gray water that goes directly out to a catch container of some sort that we empty manually. There's really no sewer gas to trap.
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Old 09-11-2016, 10:20 AM   #6
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These A frames really don't need a P trap since the only "sewage" is gray water that goes directly out to a catch container of some sort that we empty manually. There's really no sewer gas to trap.
I've wondered about that ever since I purchased the A-frame. Seems like it takes up valuable space for no good reason. I think the Palomino drain has the right idea. It might drain a little slower but a small price to pay for extra storage and less clutter. The only reason I could think of to have a trap is to keep any odor from portable grey water tank from entering trailer through drain but most of the time these portable tanks are emptied often enough so odor would not have time to develop. Does anyone else think a p-trap is necessary on these small A Frames? I also have a p-trap on my inside shower that I would like to remove due to the fact it hangs low under the trailer.
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Old 09-12-2016, 12:53 PM   #7
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Does anyone else think a p-trap is necessary on these small A Frames?
I'd not thought of it before, but removing it would seem to be a good idea. If it becomes a problem the trap could easily be replaced.
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Old 09-12-2016, 05:17 PM   #8
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Does anyone else think a p-trap is necessary on these small A Frames?

I put a small vertical loop in the grey water drain hose outside---this functions the same as a p-trap to prevent odors from coming up from the storage container.

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Old 09-12-2016, 06:43 PM   #9
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Does anyone else think a p-trap is necessary on these small A Frames?

I put a small vertical loop in the grey water drain hose outside---this functions the same as a p-trap to prevent odors from coming up from the storage container.

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This is pretty much what I do. Just get a little more hose than you need and let it hit the ground...then go up and over the top of the bucket.
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Old 09-13-2016, 05:12 AM   #10
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They may have the p trap due to local building codes whether it's needed or not. I can't imagine a sink or toilet installation without a trap.


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Old 09-13-2016, 06:37 PM   #11
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I had one of these things in my 05 coachman clipper.
They are designed for flip down sinks... the hose split after 4 years....at the same time the lift system gave out on the trailer.
Looking at that pic just brings back very bad memories.
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Old 09-14-2016, 01:44 PM   #12
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I just installed one of these on my A128, replacing the stock 1 1/2" drain with standard trap. I had already removed the water filter, and use an outside filter instead.

It did open up more storage space under the sink. The only disadvantage I see is that grey water will drain somewhat more slowly, due to the smaller diameter of tube (approx. 3/4") and smallish opening in the white cup under the drain - a large chuck of food or debris might be more likely to clog this drain.

If just flushing soap and water, it should not be a problem.
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Old 09-15-2016, 10:28 PM   #13
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Originally Posted by mudman2 View Post
They may have the p trap due to local building codes whether it's needed or not. I can't imagine a sink or toilet installation without a trap.


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I installed one of these drains on my A-122 today. The part that attaches to the bottom of the sink is designed to function as a p-trap to prevent odors from flowing up the drain line. More under-sink storage now.

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Old 09-18-2016, 07:43 AM   #14
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Originally Posted by tjwoody View Post
These A frames really don't need a P trap since the only "sewage" is gray water that goes directly out to a catch container of some sort that we empty manually. There's really no sewer gas to trap.
I'd guess that if you connect the A frame to camping sewage, then the P-trap would be usefull (required!)

But we never did that (so far) and have a catch container, so if I ever see it leaking again, I'll replace the trap with a direct connection. Thanks for the though.

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