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Old 01-18-2012, 05:06 PM   #1
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PVC joint wasn't glued


Hi, a friend a me ran some PVC under a fish tank and after we got it all together we noticed a joint where an elbow goes wasn't glued, it felt so tight we thought it was. After this happened we decided a red dot at joint means glued.

Anyways at this point there is no replacing the elbow, everything would need replacing because the elbow can't come out.

My question is can we prime and glue where the joints meet? The system isn't under pressure, the leak only happens when a valve is shut and the water is pushed another direction. It takes a few minutes for water to leak and its slow.

Thanks

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Old 01-18-2012, 05:09 PM   #2
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PVC joint wasn't glued


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Hi, a friend a me ran some PVC under a fish tank and after we got it all together we noticed a joint where an elbow goes wasn't glued, it felt so tight we thought it was. After this happened we decided a red dot at joint means glued.

Anyways at this point there is no replacing the elbow, everything would need replacing because the elbow can't come out.

My question is can we prime and glue where the joints meet? The system isn't under pressure, the leak only happens when a valve is shut and the water is pushed another direction. It takes a few minutes for water to leak and its slow.

Thanks
nope, you have to take it apart!

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Old 01-18-2012, 05:14 PM   #3
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PVC joint wasn't glued


It will leak PVC glue is not a Glue but a solvent that melts and fusses the plastic together, thatís why when you glue the joints together you have to give them a ľ turn. The plastics arenít glued their fused.
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Old 01-18-2012, 05:20 PM   #4
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thanks, I knew it fused the plastic but thought it still would around the seam.

How about a good silicon?

The big problem is there's no way to cut pieces out, there all bumped together using homemade inside couplers so if anything was cut nothing to reattach to. There's over $100 that would need replacing, seriously no other way?

Last edited by robsworld78; 01-18-2012 at 05:24 PM.
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Old 01-18-2012, 05:30 PM   #5
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PVC joint wasn't glued


Go to your local marina (boat supply) and buy a product called marine tex get the one for plastic, thatís the only thing that comes to mind. Research it on line see how it will do on pvc pipe, Good luck
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Old 01-18-2012, 07:02 PM   #6
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PVC joint wasn't glued


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thanks, I knew it fused the plastic but thought it still would around the seam.

How about a good silicon?

The big problem is there's no way to cut pieces out, there all bumped together using homemade inside couplers so if anything was cut nothing to reattach to. There's over $100 that would need replacing, seriously no other way?
then you do not need our advice on how to repair...I and Iam sure the other plumbers will not tell you to repair this any other way than take it apart and redue it....good luck ...
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Old 01-18-2012, 07:11 PM   #7
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PVC joint wasn't glued


Not sure how this $100.00 comes in you could fill up 1/2 a shopping cart full of PVC fittings and not come up with $100.00 dollars worth.
What's cheaper fix it right or come home to a floor soaked with water and have to go through all the repairs to fix it.
It's a two min. fix.
There is no red dots on PVC. If it had of been primed and glued as it should have been It would have had purple on the piping.

Last edited by joecaption; 01-18-2012 at 07:19 PM.
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Old 01-18-2012, 07:29 PM   #8
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PVC joint wasn't glued


This is why PVC primer is purple.
It's a visual clue that the work proceeded correctly.
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Old 01-18-2012, 07:56 PM   #9
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PVC joint wasn't glued


It's expensive because there's 2 large ball vales and a bunch of other parts all bumped up with no pipe between them, maybe not $100 but $70-$80. Around here this stuff isn't cheap, a ball value is $25 for one. 1 1-1/2 elbow is $2.50, its crazy.

For some reason the cement and primer I'm using is clear and dries clear, definitely not purple but now that you mention that I have seen it like that. I got this stuff and the PVC at the fish store, the cement/primer is for flex pvc as well, maybe that's why its clear. I know there are no red dots on the PVC but its a good idea to put one when you glue at least that's what we came up with after the problem, then no second guessing whats glued.

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What's cheaper fix it right or come home to a floor soaked with water and have to go through all the repairs to fix it.
That's why I came on here and didn't just plaster cement, I'm not a plumber and didn't know it was that hard to repair such a small leak.

If I cut the elbow out along the seam that meets the tee (elbow bumped right against tee) is there an way to get the connecting tube out of the tee so I can slide another pipe inside? I can't imagine grinding it out perfectly round.

Thanks
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Old 01-18-2012, 08:37 PM   #10
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PVC joint wasn't glued


Buy a tool called a Ram Bit
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Old 01-18-2012, 08:41 PM   #11
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thanks, when I get back at it on the weekend I'll have to see if there's room for something like that, I almost don't think there's room, looks like I gotta spend the money either way.
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Old 01-18-2012, 08:43 PM   #12
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PVC joint wasn't glued


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thanks, when I get back at it on the weekend I'll have to see if there's room for something like that, I almost don't think there's room, looks like I gotta spend the money either way.
Buy your plumbing parts at a hardware store instead of a fish store- prolly save some cash
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Old 01-18-2012, 08:44 PM   #13
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PVC joint wasn't glued


yeah your right I would save a few dollars but there not much cheaper at the hardware store, I saw some the other day.
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Old 01-18-2012, 08:52 PM   #14
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PVC joint wasn't glued


Hard to tell you how to fix something without a picture.
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Old 01-18-2012, 10:25 PM   #15
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PVC joint wasn't glued


Pix please

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