Washing Machine standpipe P-trap has hose inside?

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aggie83

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Joined
Nov 16, 2021
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3
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Rising Star, Texas
My mom's RV has a washing machine closet and she has been happy for the last two years with having the small appliance. It started spewing water out of the standpipe, so I thought it might be clogged. I put a pipe cleaner down the pipe and it gurgled and seemed to clear. When I looked down the pipe, there is a double 'pipe' that is inside the plumbing pipe and the water goes down that?

any help on knowing if that is supposed to be in there? 2015 Open Range RV

Many thanks.
 

Gary RV_Wizard

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Feb 2, 2005
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At my Silver Springs FL home
Thinking a bit more about this, is the dryer perhaps the unvented tyope? Those dry the clothes by running cooling water over an evaporator coil, and that water also gets flushed down the drain. Maybe there is a special drain tube to accommodate that?
 

phil-t

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Jul 10, 2017
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Ogdensburg, NY
Sounds to me like you might have one of these. Had one fail a few weeks ago - took it out and put in an S-trap.
Another PIC showing the inside - that inside "membrane" had somehow turned inside out and was blocking the drain.
Capture.JPG
 
Last edited:

aggie83

New member
Joined
Nov 16, 2021
Posts
3
Location
Rising Star, Texas
Sounds to me like you might have one of these. Had one fail a few weeks ago - took it out and put in an S-trap.
Another PIC showing the inside - that inside "membrane" had somehow turned inside out and was blocking the drain.
View attachment 150207
I think this is what is in there. Here is a pic from the top, it is a floppy heavy vinyl thing?, So I could put in an S trap?
washer.jpeg
 

phil-t

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Jul 10, 2017
Posts
1,242
Location
Ogdensburg, NY
Yes. That looks like a similar device. The membrane is pushed back "up" the pipe so it blocks the waste flow.
I chose to do the S-trap because I had room and the company that made that "trap" device told be they recommended at least 40" of standpipe above it.
I've had no issues with the S-trap.
 

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