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Old 08-01-2016, 03:05 PM   #11
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AquaMan - This does make sense. I haven't paid attention to how full the tanks are until the pressure builds like carmex has done. I will start doing so.

Carmex - I could not get any useful information out of measuring from the roof vent on my 369DS. I would advise against the effort. On all three of my vents, I hit what I believe is an elbow between 7 and 9 feet. On the vent I believe is for the rear black tank, I forced the tape measure past the elbow and went as far as 22 feet. So now I am thinking I am working across the MH. Once I tried to retract the tape, it got stuck on the elbow. I took what seem like 20 minutes and a lot of cursing to get it unstuck.

I will take AquaMan's theory as gospel because it seems plausible to me. I have no issues with draining, so there is no need to fix what is not broke. At least (in my mind) I have an answer to my mystery.

Thanks AquaMan.
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Old 08-01-2016, 03:34 PM   #12
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Quote:
Originally Posted by tkarper14 View Post
AquaMan - This does make sense. I haven't paid attention to how full the tanks are until the pressure builds like carmex has done. I will start doing so.

Carmex - I could not get any useful information out of measuring from the roof vent on my 369DS. I would advise against the effort. On all three of my vents, I hit what I believe is an elbow between 7 and 9 feet. On the vent I believe is for the rear black tank, I forced the tape measure past the elbow and went as far as 22 feet. So now I am thinking I am working across the MH. Once I tried to retract the tape, it got stuck on the elbow. I took what seem like 20 minutes and a lot of cursing to get it unstuck.

I will take AquaMan's theory as gospel because it seems plausible to me. I have no issues with draining, so there is no need to fix what is not broke. At least (in my mind) I have an answer to my mystery.

Thanks AquaMan.
Agreed, no issues dumping for me either, but I do get smell when flushing after reaching the magic threshold in the tank and as Darugs pointed out, I worry about pressure from heat creating a surprise some day.
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Old 08-01-2016, 05:44 PM   #13
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364 rear black tank

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Old 08-01-2016, 06:06 PM   #14
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It's puzzling to me that some RV manufacturers have problems assembling functional vents. The fresh water tank on my 5th wheel can't be completely filled unless I put my mouth over the fill opening and blow to clear water out of the vent tube. This is probably not a valid procedure for the toilet even if one's mouth is big enough.
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Old 08-01-2016, 06:58 PM   #15
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Now that would be a potty mouth.
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Old 08-03-2016, 09:14 AM   #16
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364 rear black tank

I think I have this issue on my 2015 360xl on rear black tank. Can't find access to where the vent is on the tank.


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Old 08-03-2016, 11:43 AM   #17
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This seems to be an issue with ALL my tanks. I've been wondering why, when I dump my tanks, I get part way through, everything stops, gurgles a bit, then there's a sudden and loud release (like a vapor lock being released) and then everything continues draining.

Thanks for the suggestion on that, it makes perfect sense.
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Old 08-04-2016, 07:23 PM   #18
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Okay so we found a possible problem but what is the fix if you pull the pipe up from the roof I would suspect you break the seal at the top of the black tank, how would you reseal it if you can't see it?
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Old 08-04-2016, 07:40 PM   #19
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Dunno, good question. We are planning to try to get it fixed under warranty but will probably wait a couple months until it isn't peak season. I'll post back if we get it taken care of and what the fix was. Maybe someone else has some ideas in the meantime though.
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Old 08-04-2016, 07:59 PM   #20
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364 rear black tank

On my 360 I located what wall the vent is in but they do not have easy access. Will have to wait until I move it and open my bedroom slide to see if I can access from bedroom side. If Not I would have to pull out my bathroom closet.


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