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Old 09-24-2019, 12:29 PM   #1
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1974 27' Overlander
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Floor to ceiling black PVC

I just gutted the 1974 Overlander (center bath) and have three black PVC pipes that go floor to ceiling exiting the roof. I canít figure out what theyíre for or why they go up to the ceiling. Iíve searched the owners manual and forums alike with no answers.

What are they and do I need to keep them? In other words, do they have to stay in place and be in the way? Or no?

Iíve attached a picture of all three pipes as well as a closer up picture of where the kitchen sink, shower, etc. were on the left.
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Old 09-24-2019, 12:34 PM   #2
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Originally Posted by ReikiRocket View Post
I can’t figure out what they’re for or why they go up to the ceiling.

What are they and do I need to keep them? In other words, do they have to stay in place and be in the way? Or no?
They are the vent pipes for your plumbing, black & grey tanks. Without them, your sinks will not drain and your tanks will not fill properly as air cannot escape for the water to displace it.

The pipes can either "remain as-is" if you don't want to mess with your tanks or they can be "moved" or "modified" if you want to move/modify your tanks & plumbing. Regardless, if you have tanks, you need to vent them somehow.

Shari
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Old 09-26-2019, 09:45 PM   #3
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Vent line. Must have. This takes “gasses” from waste tanks as well as allowing liquid into the tanks. If you don’t vent they the roof you will not have many visitors... the pets may not stay either. Oh. And the odors could be poisonous..
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Old 09-27-2019, 08:25 AM   #4
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1974 27' Overlander
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Vent line. Must have. This takes ďgassesĒ from waste tanks as well as allowing liquid into the tanks. If you donít vent they the roof you will not have many visitors... the pets may not stay either. Oh. And the odors could be poisonous..


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