Jsk, having similar problem. Only out once and was winter camping. Small amounts of portable water in bathroom sink, when released water backed up in shower, it did slowly drain, however it was a small amount and my concern with a steady flow we will have a problem. Before seeing your post I was checking out behind the garage in the access area and found the hepvo. If I start to loosen it, blue liquid which I assume is part of the diaphragm was leaking., so I stopped at that point as I have to wait until I can get somewhere to be able to dump to try a full flow. Anyone have experience with these waterless traps, between Jsk,s experience and mine sounds like they may need some tweaking. ( the sink and shower share a hepvo, put there is 4 ft of pipe the sink water had to back up from the where the two join just above the hepvo, therefore hardly any of my sink water initially went thru the hepvo and only did slow very slowly.
Also have a question on the heat air flow, only the vent on the stairwell blows with any force, all others have heat but no real force. How is the airflow for others in the REQS living room or bedroom? In access area also found the pipe for the stair vent had not been clamped and only stuck in the cover. Will need to fix.
Another item is the propane tank regulator. Only seemed to work when tank on far side had propane. If it was empty it would not draw with just tank on right side(where regulator is located) but did work when switched.i.e empty tank was on side with regulator.
Anyone else experience oddities?
Otherwise loving our REQS and hoping to get out again and give a better test of all systems.