Fml...

Jlaw · 08-08-2016, 12:20 PM

I believe the saying goes, if it weren't for bad luck I'd have no luck at all? Anyhow, I have a 2016 Coachmen Chaparral 371mbrb. About a month ago I accidentally flushed the system while I wasn't there....recovered from that mess unscathed. Today however....I checked our tanks, both blacks were full, gray 1 was 2/3 full and gray 2 was empty(wth?) so I told my 12 year old to run his bathroom sink for 5 minutes. That 5 minutes turned into 10 and before we knew it both the sink and toilet were overflowing! Insert a whole list of Marine corps worthy profanities here. Because I can't find a dang thing on the Internet and Boat and RV World doesn't care to offer up any over the phone advice....does anyone know the layout of the tank systems of this model? I know the full bathroom sink drains into the black tank, does the second bathroom also? I can't imagine why on earth the second gray tank would always read empty. It's read empty since the day we got it in July! If I weren't already out $30,000 on this thing I would be about ready to throw in the damn towel.

**bikendan** · 08-08-2016, 03:35 PM

NEVER rely on the idiot tank sensors.
They are famous for their unreliability.

Jlaw · 08-08-2016, 03:56 PM

Lesson learned I suppose....I seem to be approaching rv'ing like my past relationships..learning my lessons the hard way lol.

shorthorn · 08-08-2016, 04:00 PM

something doesn't sound right here... To my knowledge they would never connect a sink to the Black tank... Those should be toilets only!

I don't know the holding tank layout, but my guess is that your sensor for Grey 2 is not functioning..

I don't' understand how running water in the sink caused the toilet and sink to overflow.... Even if we assume they are both connected to the same tank, shouldn't the toilet overflow long before the sink (sink is easily a foot higher than the toilet)... I am baffled how that is possible so I will shut up and hopefully someone with this model can expound on how the tanks are connected.

Jlaw · 08-08-2016, 04:11 PM

I don't understand it either...just pulling at straws now 😕

mcnabbwr · 08-08-2016, 04:18 PM

Trial by error. In my sons BH unit the outdoor kitchen sink in plumbed into the rear black tank and the small rear sink goes into the gray tank. He has two black and one grey tank.

Gee Whiz · 08-08-2016, 04:26 PM

sounds to me like a screwed up mess

Alex.mcintosh40 · 08-08-2016, 05:51 PM

I can actually explain it to you. Found out on my 16 371mbrb during are week stay in July. The rear gray tank is only for the outside sink. The grey tank in the middle of the camper is for back bathroom and kitchen sink. The last and final grey tank is for the shower and bedroom sink.

Jlaw · 08-08-2016, 05:56 PM

There's a third grey tank??? Where in the devil is the release valve? I'm only aware of two sets of release valves.....

Alex.mcintosh40 · 08-08-2016, 06:01 PM

There is one in the storage compartment then one right above the front drain. Maybe off slightly to the left or right then the back gray tank handle. I should have mine back from the dealership tomorrow or Wednesday I could send you a picture of them. Trust me I was very confused with them all ot made no sense

Jlaw · 08-08-2016, 06:07 PM

A picture would be great, thanks...I find myself a little more aggravated with boat n rv than I already was a month ago -_- I've been going through all of the manuals that came with the unit since my kids started back to school. Literally half of them are missing. The AC unit manuals, two different models, stove, outdoor fridge and grill etc. I get the pleasure of going to pick them up tomorrow

Alex.mcintosh40 · 08-08-2016, 06:13 PM

Oh man yeah definitely will get you one tried to zoom in on my pics but couldn't see it.. wow that's crazy and not good we just had a propane tank on ours go haywire. And some other few bull crap things.. I agree the dealer definitely should of showed you all this stuff on the walk through the front two tanks normally are the only ones that really fill up for a whole week I hardly touched the outdoor sink so had like next to nothing in that one.

Alex.mcintosh40 · 08-11-2016, 03:54 PM

Sorry took so long they didn't have it done finally today..

Jlaw · 08-11-2016, 08:18 PM

Thanks! That's so bizarre, mine has the two levers in the water panel just like yours and then it has two side by side on the back, right under the slide out.

rockfordroo · 08-11-2016, 08:42 PM

Quote:

Originally Posted by shorthorn

something doesn't sound right here... To my knowledge they would never connect a sink to the Black tank... Those should be toilets only!

I don't know the holding tank layout, but my guess is that your sensor for Grey 2 is not functioning..

I don't' understand how running water in the sink caused the toilet and sink to overflow.... Even if we assume they are both connected to the same tank, shouldn't the toilet overflow long before the sink (sink is easily a foot higher than the toilet)... I am baffled how that is possible so I will shut up and hopefully someone with this model can expound on how the tanks are connected.

You might think so, but it's pretty common to find some sinks plumbed to the black tank, based on threads I've read here for the last 5 years. Of course, there's never anything to tell you that. You have to find out the hard way.