Roadtrek 210 Versatile Shower Drain Slow to Empty

[teslasmuse]

I bought a long heavy-duty spring with brushes on each end for cleaning lines and I was going to run this down my 2011's shower drain, does anyone know approximately how far it is from the drain to the grey tank? Any tips? I have tried Unique soaking for several days, but the lines must be pretty cruddy. Thanks in advance

 

[phlhorse]

I had an issue this summer with the floor pan drains and then eventually the kitchen sink drain backing up. Checked all pipes and found clear, even checked the stack vents with an endoscope and found nothing. Finally looking at the drawings noted air valves located under the kitchen sink and one also in the vanity sink. Checked these and found the kitchen sink had been stuck closed. Clean and sprayed both with silicone and all is fine now.

 

[teslasmuse]

I'll have to consult the online RT manual, I just tried running the brush wire down the drain and felt around and it didn't really pull anything out but whatever I did was enough to make the drain work a bit better, maybe I just pushed the obstruction to the side lol