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Old 07-14-2015, 07:09 PM   #1
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gray water tank vent done broke

So, noticed a smelly sink July 4th weekend, finally looked at it today. Turns out the vent to outside is broken clear in half, so I need to replace it:



The question is, is this fitting on the tank removable?



The vent comes up from here, and tees off to p-trap and up to vent, and the 90 fitting is broken, with no room to cut and splice in new pipe. So I have to remove and redo the whole darn thing. But this tank fitting seems pretty permanent.

Thoughts?

In the meantime I fixed it using a time honored craftsman technique I learned a while back: lay on a bunch of duct tape.
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Old 07-14-2015, 07:10 PM   #2
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Re: gray water tank vent done broke

P.S. The reason it broke is the tank itself is not very well secured, and can rock back and forth about an inch or so. The vent was actually a structural member until it snapped.
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Old 07-14-2015, 07:22 PM   #3
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Re: gray water tank vent done broke

The base attached to the tank looks like it has threads? The whit piece in the second pic.

Where does your vent exit to the outside?
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Old 07-14-2015, 07:51 PM   #4
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Re: gray water tank vent done broke

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Originally Posted by 1der
The base attached to the tank looks like it has threads? The whit piece in the second pic.

Where does your vent exit to the outside?
Yeah, it looks like it has threads but it also looks to be covered in glue of some type. It's pretty well tight, and I didn't want to force it.

Vents through the wall like most.
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Old 07-14-2015, 08:10 PM   #5
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Re: gray water tank vent done broke

I can't see exactly what is going on above where the second photo shows, but I'd probably want to try not removing that tank fitting first also, if it were possible.

A couple of thoughts that may or may not fit what you have:

1) Apparently they do make a tool that will ream out a glued fitting back to original size. What I mean is that the female side (I think this is called "hub"?) can be relieved of the glued in male part (spigot?). I've never tried it though, and it sounds a bit dicey.

2) There may be a way you can use a Fernco coupling (or they even make 90 fittings, I think). Especially if it's in the vent section. That might also help ease the strain on the pipe.

My '97 Indiana build had the typical rubber grommet going into the tank (like an Ameri-Kart 1-1/2" grommet). Sounds like the vent part is similar though - it went out the wall near the kitchen sink with a round metal grille covering it on the outside.
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Old 07-14-2015, 09:27 PM   #6
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Re: gray water tank vent done broke

I would go after the fittings you need separated with a heat gun, carefully, if you can without burning anything else. And don't breathe it! It is possible to soften pvc/abs glue with heat and reuse the fittings if needed. Lowes here has ABS, Home Depot does not. Not sure if you have Lowes.
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Old 07-14-2015, 09:30 PM   #7
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Re: gray water tank vent done broke

Quote:
Originally Posted by 86Scotty
I would go after the fittings you need separated with a heat gun, carefully, if you can without burning anything else. And don't breathe it! It is possible to soften pvc/abs glue with heat and reuse the fittings if needed. Lowes here has ABS, Home Depot does not. Not sure if you have Lowes.
No shit? All I gotta do is get the broken part of the 90 in the picture off the nipple attached to the T in the other picture.

I'll try a heat gun. Next week.
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Old 07-14-2015, 09:32 PM   #8
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Re: gray water tank vent done broke

Quote:
Originally Posted by 86Scotty
I would go after the fittings you need separated with a heat gun, carefully, if you can without burning anything else. And don't breathe it! It is possible to soften pvc/abs glue with heat and reuse the fittings if needed. Lowes here has ABS, Home Depot does not. Not sure if you have Lowes.
Great advice Eric, except we are talking rallypanam here and the heat gun approach needs to be applied with some care and patience right?
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Old 07-14-2015, 09:37 PM   #9
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Re: gray water tank vent done broke

can you cut it high enough to slide a no hub over it and rebuild the rest?
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Old 07-14-2015, 10:11 PM   #10
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Re: gray water tank vent done broke

Quote:
Originally Posted by 1der
Quote:
Originally Posted by 86Scotty
I would go after the fittings you need separated with a heat gun, carefully, if you can without burning anything else. And don't breathe it! It is possible to soften pvc/abs glue with heat and reuse the fittings if needed. Lowes here has ABS, Home Depot does not. Not sure if you have Lowes.
Great advice Eric, except we are talking rallypanam here and the heat gun approach needs to be applied with some care and patience right?
Don't be a wuss. What could possibly go wrong?
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