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Old 04-14-2015, 08:12 PM   #1
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Black tank plumbing issues on Pinnacle....anyone else?

We have a 2012 Pinnacle 36KPTS. We've been full timing two weeks now. We had a major clog at the first 90 degree elbow from the toilet to the tank. That was our fault.....newbie mistake....not enough water. We've been using Angel Soft TP. Hubby cleared the clog so we've been using tons of water when we flush. Today, we had another clog, same place. Today, we switched toilet paper to Scott's 1 ply.Question for other Pinnacle owners.....is anyone else having issues like this? This is a very poor design. I hope the new tp solves it.....

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Old 04-14-2015, 09:43 PM   #2
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We tried one of those baby diaper disposal pails. Drop the wad of TP in, give it a twist and its sealed. No smell, and no toilet paper in the tank to foul the sensors.... Even still when we have guests who forget the diaper disposal, we utilize the RV toilet paper, it dissolves easier.

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Old 04-14-2015, 10:02 PM   #3
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If you are flushing TP down your RV toilet, it should only be RV compatible toilet paper. Regular stuff will cause problems. However, the elbow you say you have in your drain doesn't help either.
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Old 04-15-2015, 08:51 AM   #4
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You are leaving the black tank valve closed till the black tank is full right? Never ever leave the black tank open...
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Old 04-15-2015, 10:06 AM   #5
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That's a poor design. Black water tank plumbing should always be designed to run straight out. Never understood why designers did that. Everyone knows, the quickest way out is straight. Same thing with a/c or heat. The more bends you have in the duct work, the more the flow is restricted.
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Old 04-15-2015, 01:33 PM   #6
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Before... uh... you drop the kids off in the pool, be sure to make the bowl the deep end by filling it with water.
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Old 04-15-2015, 02:55 PM   #7
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Black tank stays closed until it reads at least 3/4 full then dump it and close it back. Because of sewer gas we don't even leave grey tanks open. I can dump black and then grey in a few minutes and good to go for 2 days.
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Old 04-16-2015, 01:19 AM   #8
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Angel soft changed their TP and does not dissolve like it did in the past. We tested Costco brand TP and it dissolves quickly. When you think you used enough water when you flush the toilet add more.
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Old 04-16-2015, 05:24 AM   #9
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Are you using your black tank flush?

If one does not use a quick dissolving toilet paper you should.

Also a good chemical liquid tank treatment should not be avoided.

We use TankTechs Rx. 34oz bottle (68 treatments) retails for $39.95 ($.59 per tank treatment) and well worth it.

***You may have to get the "sewer guy" to remove/flush (high pressure water introduced straight up the dump outlet) all the buildup at the bottom of the tank. While he's at it he can remove any mildew or other things going on in the grey tanks. One might be suprised what is in those tanks.

We use TankTechs Rx in all our tanks.

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Old 04-16-2015, 07:15 AM   #10
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My Designer has a similar turn right at the bottom of the drain right at the black tank. I too had a plug one time early on. I full time and in year 5 and never a plug since:

I use zero chemicals in the tank
Only empty when tank "burps" and I know it is full
I use Northern Quilted multi ply TP
I use the tank flush most every time I dump the tank but not every time (I didn't use the flush at all for 3 months early this year since the park had such low water pressure I just didn't bother)
I do not put TP in a trash can or other device - it all goes in the black tank

What I do to prevent clogs is:

When ready to flush I fill the bowl up enough to cover whatever is in the tank and wet all of the TP. I then flush and fill the tank again up to at least the same level and flush again.

Never a problem in 5 years.


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