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Old 03-24-2008, 05:44 PM   #1
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just curious - PVC primer


what does PVC primer do and how bad can it be if it is not used ? i realized that i forgot to use it on one buried joint but i do not think the mistake is so bad as to warrant the very laborious correction.

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Old 03-24-2008, 06:05 PM   #2
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just curious - PVC primer


PVC glue will not and can not stick to the shiny parts of another joint.
In solvent welding the PVC glue actually melts the 2 pieces together chemically. The primer cleans the shiny coating which is too hard for the glue to melt. Without it, it may "Stick" but wont be glued tightly so as to be water tight and therefore may leak.

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Old 03-24-2008, 06:09 PM   #3
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just curious - PVC primer


Where is the connection located and is this pressure or DWV? If it's DWV and it's not under a slab or anywhere else a leak could be a health hazard I'd leave it. If it's going to be in your basement or have pressure fix it.
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Old 03-24-2008, 06:15 PM   #4
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just curious - PVC primer


but if the mistaken joint is under ground and the expected discharge is minimal (rain drainage from in front of the door joining a main stack coming vertical), you wouldn't bother to fix, would you ? i mean, the ground is wet already and we are talking of maybe drops of leakage per month.
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Old 03-24-2008, 06:20 PM   #5
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Where is the connection located and is this pressure or DWV? If it's DWV and it's not under a slab or anywhere else a leak could be a health hazard I'd leave it. If it's going to be in your basement or have pressure fix it.
DWV, buried in dirt under concrete slab.
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Old 03-24-2008, 06:23 PM   #6
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If the slab isn't down already I'd fix it. It's not really regular discharage I'd be worried about, that will be a couple drops a month if anything. The problem comes when you get a clog and the system fills up and is pressurized. That joint is a weak spot as has the potential to blow apart.
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Old 03-24-2008, 06:25 PM   #7
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just curious - PVC primer


i just laid concrete there last week.
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Old 03-24-2008, 06:26 PM   #8
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i just laid concrete there last week.
I'd just worry about it if/when it becomes a problem then. Worst case you get a little water in the basement.

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