Mods please feel free to move this to a more appropriate location if need be.I recently purchased a 1995 Coachmen 248TB from a coworker. Prior to the purchase he explained that there was a roof leak some time back and that the bathroom floor was soft because of it. I figured no big deal, replace some flooring, relay the vinyl and be done...boy was I wrong. On Sunday 12/21/14 I began removing the vinyl and pressboard flooring from the camper. In the process I unbolted the toilet and removed it from the bathroom area leaving the wax ring/toilet mount exposed. At that time there was nothing in the black water tank. Yesterday 12/28/14 I returned to remove the tub and sink cabinet and to my surprise when I looked down in the black water tank with a flash light it appears to be almost full. I looked from the ground and it looks like the cap on top of the vent pipe is intact. Does anyone have any idea where this water could have come from. I tried searching the forums and didn't find anything on this topic. Any help/suggestions are greatly appreciated.

I don't know where your water came from, but it would take an epic rain like Noah's to fill a black tank through the vent. Especially with the vent cover in place.

That's an interesting problem. Is there by any chance a tank flush system installed in the black tank...and connected? If the water was coming from a roof leak you would surely notice that amount of water coming from somewhere.

Of course, water runs down hill....so it sounds like you still have a huge leak somewhere. Water is running down inside the walls and draining into the black tank.Best to climb up top and start checking seams, the roof itself, or caulking around the pipes, A/C, vents, antennas, etc. I doubt a leaking running light would fill up your tank that fast.This is an unusual issue and doesn't sound good to me.Leaks aren't unusual, but leaking that much into a holding tank....yikes.

That's exactly what I was thinking but it's the only possible explanation I've come up with thus far. I guess I'm just confused. Underneath the toilet there was a plastic mounting ring that closely resembles a wax ring in a normal home. I have cut the flooring around that mount out completely so the mount sticks up above floor level. If water was leaking down a wall and running across the floor it would drain down onto the varmint barrier rather than running down the hole where waste would enter the black water tank.

I should have probably included the fact that the camper isn't connected to anything right now. No water, no power, no drain...nothing is connected. Just spoke to previous owner, there is not flush system installed on the black water tank either.

Rain Water in Black Water Tank??? | Good Sam Community

26 Replies

Halmfamily
Explorer
Dec 29, 2014
I would start at the roof. Make sure the roof vent in not sunk down and water pooling around it and then draining down the vent. In the mean time I'd keep the black tank valve open to prevent possible flooding. Good luck, let us know what you found.
Chuckles248TB
Explorer
Dec 29, 2014
I should have probably included the fact that the camper isn't connected to anything right now. No water, no power, no drain...nothing is connected. Just spoke to previous owner, there is not flush system installed on the black water tank either.
Chuckles248TB
Explorer
Dec 29, 2014
That's exactly what I was thinking but it's the only possible explanation I've come up with thus far. I guess I'm just confused. Underneath the toilet there was a plastic mounting ring that closely resembles a wax ring in a normal home. I have cut the flooring around that mount out completely so the mount sticks up above floor level. If water was leaking down a wall and running across the floor it would drain down onto the varmint barrier rather than running down the hole where waste would enter the black water tank.
downtheroad
Explorer
Dec 29, 2014
Of course, water runs down hill....so it sounds like you still have a huge leak somewhere. Water is running down inside the walls and draining into the black tank.

Best to climb up top and start checking seams, the roof itself, or caulking around the pipes, A/C, vents, antennas, etc. I doubt a leaking running light would fill up your tank that fast.

This is an unusual issue and doesn't sound good to me.
Leaks aren't unusual, but leaking that much into a holding tank....yikes.
RVcircus
Explorer II
Dec 29, 2014
That's an interesting problem. Is there by any chance a tank flush system installed in the black tank...and connected? If the water was coming from a roof leak you would surely notice that amount of water coming from somewhere.
mhardin
Explorer
Dec 29, 2014
I don't know where your water came from, but it would take an epic rain like Noah's to fill a black tank through the vent. Especially with the vent cover in place.

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Rain Water in Black Water Tank???

26 Replies

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