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Old 01-03-2021, 11:06 AM   #1
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Toilet downtube

The pipe that goes into the blackwater tank on my Wolf Pup 16pf seems to be too close to the bottom of the tank not giving enough space for waste to exit.
What is the correct distance from bottom of tank to bottom of toilet downtube?
I’m assuming you need to have some extra length to avoid “backsplash”.
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Old 01-03-2021, 11:33 AM   #2
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get a piece of wire, make a j on end , put down tube hook on bottom of tube , pull up then push to bottom of tank , measure distance rod moved down. that tells you how much gap between tube and tank bottom.
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Old 01-03-2021, 08:04 PM   #3
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Quote:
Originally Posted by DCoul View Post
What is the correct distance from bottom of tank to bottom of toilet downtube?
I’m assuming you need to have some extra length to avoid “backsplash”.
Well, I would say that depends on the largest diameter....ummm....oh never mind!
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Old 01-03-2021, 08:13 PM   #4
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I can say that at least in my experience, that the gap was shorter than half of a tennis ball. Kids put a tennis ball down the tube in my previous camper and fortunately the tube was down so far that the ball couldn't roll away.
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Old 01-04-2021, 04:04 PM   #5
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I know how to measure it. I’m looking for what to do after measuring. If anything.
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Old 01-04-2021, 04:04 PM   #6
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2” or so?
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Old 01-04-2021, 07:09 PM   #7
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Originally Posted by DCoul View Post
I know how to measure it. I’m looking for what to do after measuring. If anything.
Not sure if that was for me. I should have been clearer...mine ended less than a half tennisball from the bottom of the tank and I never had an issue with the tank. If I were you, I wouldn't change anything unless problems started. If problems were to start, I'd start with adding more water before I considered raising the tube. In my experience, poop pyramids are caused by insufficient water and not tubes the end too close to the bottom of the tank.

Hope that helps.
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Old 01-04-2021, 07:14 PM   #8
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The tube is that close to the bottom to prevent gases from coming up the tube when the level is low. If you make it shorter you will be making a post about why your camper reeks.
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Old 01-04-2021, 07:40 PM   #9
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No. That was not for you. The 2” one was. Thanks for the reply. I’m using more water but I’ll increase it some more.
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Old 01-04-2021, 07:42 PM   #10
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Thank you. I’m good at solving one problem only to create another. I’ll up the water usage another notch before “fixing”.
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Old 01-04-2021, 09:34 PM   #11
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Thank you. I’m good at solving one problem only to create another. I’ll up the water usage another notch before “fixing”.
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