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Old 09-28-2017, 04:35 PM   #1
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Check your waterless traps

Our 2017 Classic has what they call water-less traps in place of common P-traps. I had never seen this type of water-less traps before. They appear to be nice vs. old style P-traps. When replacing our flat bottom bathroom sink i had to re-work the under sink plumbing. When I took the trap out I notice the flexible sealant used at mechanical joints by the factory was approximately 3 times more than required. Looking into the trap there was a lot of sealant in the 90's and through out the trap it's self. The amount of sealant inside was enough to restrict and more than likely cause a plugged drain system. Cleaned it out, should have taken pictures, however I did not. Seeing what had been in the bathroom sink drain, I thought best to look at the drain line under the kitchen sink. The flexible sealant used appeared ok, however the amount of glue used to put the ABS together was a lot, way more than should have been used. Cleaning the excessive glue out is difficult to say the least. Again the amount of glue I found inside the ABS most likely would have caused drainage problems down the road. I did take pictures and have attached. My opinion to others is check your drains lines. If yours are free from obstruction good, if not clean them out. When putting mechanical fittings back together, suggest using a non hardening TFE pipe sealant. sbowman
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Old 09-28-2017, 04:46 PM   #2
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So no need anti freeze in traps if I blow lines out? Really waterless?
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Old 09-28-2017, 09:20 PM   #3
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Quote:
Originally Posted by james.mileur View Post
So no need anti freeze in traps if I blow lines out? Really waterless?
Supposedly. They still hold a little water above the seal, especially when horizontal. So I'm cautious and add a little antifreeze.
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Old 09-29-2017, 01:54 AM   #4
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Water-less traps -- another Airstream "improvement" . . .



For winterizing I would add antifreeze to these -- definitely.

Peter
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Old 09-29-2017, 10:42 AM   #5
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If the trap is waterless, what exactly is the trap trapping?
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Old 09-29-2017, 10:45 AM   #6
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smell sewer gases

sewer gases, smell. sbowman
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Old 09-29-2017, 10:48 AM   #7
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I guess how a P-trap works is by using a little water to block smells/sewer gases?
So how does the waterless trap work? One way flapper/valve?
Please pardon my ignorance/curiosity.
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Old 09-29-2017, 11:23 AM   #8
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Yup. It's two teflon flexible flaps that close agains each other to seal against backflow. They spread open to let water and minor particles through. They are soft, so it's not a good idea to run a snake down them...
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Old 09-29-2017, 02:43 PM   #9
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Old 09-29-2017, 03:41 PM   #10
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Hi

Dropping a little antifreeze down the drain is a good idea no matter what sort of trap. There are all sorts of odd places for water to pile up .... Once you are on the drain side, there isn't much trouble doing it.

Bob
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Old 09-30-2017, 05:01 AM   #11
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Warning of incessant echo!



The new search function here -- powered by Google to search only this forum -- in the blue box above -- works great!

"waterless trap" search results:

https://www.google.com/search?q=wate...=airforums.com


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