Shower drain pan backup while towing

[DBL-R]

Hello, I am hoping that someone can provide a diagram of the shower plumbing.  I want to replace the pop up drain washer and a looking for the right washer to replace it with.  We have had several instances when traveling that the shower pan backs up with dirty water and yes the back flow valve is closed.  Any suggestions would be very much appreciated.

Thank you

Ron

[jd1923]

51 minutes ago, DBL-R said:

We have had several instances when traveling that the shower pan backs up with dirty water and yes the back flow valve is closed.

Hello Ron, with the 2015 hull #99, very nice! 😎

There's not a plumbing diagram that would help. My understanding is if the waste valve is closed the pop-up shower floor valve really doesn't matter. If you want to replace it anyway, maybe somebody here knows the make and part number or inquire with OTT.

You know, if you close the "back flow" valve when the Oliver nose is down, there would be grey water in the plumbing that would then come out when towing. Make sure your front jack is lifted when you're closing. We use the LevelMatePRO and always have our front up 1/2" or more when camped. We close the bathroom valve before releasing the jacks to tow.

During travel, I use the kitchen sink to wash my hands to leave that valve alone. If you open the valve with the nose down with Grey Tank on the full side, water can back up to the plumbing under the shower that you may see later.

Given all this, if it's still leaking on the shower floor, your waste valve could be jammed up, not closing fully. With the tanks empty, remove the valve and give it a good cleaning and lube. Under the front dinette seat, it's the 2" line at the top of the picture. The 4" is the black water drain and you might want to service that at the same time. The main Grey waste valve is under streetside bed, jammed against the floor where the two lower screws are VERY difficult to remove.

I serviced ours last year since the pull handles were getting very hard to pull. This thread may be of interest. Best wishes, JD

https://olivertraveltrailers.com/forums/topic/10711-waste-valves-restoration-and-upgrade/

 

[Geronimo John]

18 hours ago, jd1923 said:

Given all this, if it's still leaking on the shower floor, your waste valve could be jammed up, not closing fully. With the tanks empty, remove the valve and give it a good cleaning and lube.

I agree with JD's thoughts and recommendations.  The rear gray water valve is a bear to take apart.  But it appears that your problem likely is the vent valve up front.

I would add that if the valve is not closing there could be two causes.  The valve is partially clogged.  That can turn into a mess for sure to also deal with.

I would approach it this way:

Step 1:  First try servicing all your cables as in the below DIY.  Such a DIY is long overdue for your  hull 99.  Mine was and it is 342.  That process may result in the valve clog getting mushed and then flow down to the dump station. If that does not fix the try Step 2.

Step 2:  At a dump station, from inside, flood the gray water lines with a LOT of water.  Use your pump hot water at both sinks.  Then try max flow with the pump and a garden hosed flowing into the bathroom sink.  Suggest having a watchful eyed helper.    

Step 3:  Send a garden hose with the end cut off it from the rear of the trailer to see if you can clear it that way.  Be sure to open the gray valve outside to clear the pathway.

Step 4:  Consider getting help with a camera inspection.

Hope this helps.

GJ

DIY - Sanitary Drain Valve Cables.docx

Edited 1 hour ago by Geronimo John