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Author:
nicholas123 (FL)
This video shows another way of applying heat to separate glued pvc pipe. It involves another step, but seems to put more heat into the pipe and less heat into the fitting.
[www.youtube.com]
I am surprised at how easy the pipe separates. I thought the solvent cement was suppose to melt the pipe and fitting so they become one...especially at the bottom of the cup where there is more interference (tighter fit).
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Author:
Fixitangel (NC)
Ahh, nothing like the smell of hot, smoking poly vinyl chloride first thing in the morning, huh?
Very interesting. Perhaps the term "solvent welding" impiles that a small contact surface area gets "fused" together, as opposed to welding steel where the surface penetration is much deeper?
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Author:
KCRoto (MO)
I can't think of a single situation that I would risk a joint leaking afterward if I had to heat it to get it apart short of a pvc stool hub in a concrete floor.
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Author:
Doug E. (CA)
I worked for a company that did repair work on pools, spas, and solar heat for pools. On occasion it made most sense to salvage a hub by removing pipe with heat. Yep..those fumes can't be good. I remember using a torch and a flat head screwdriver. Heating hole saws well that's a new trick! that guy made it look incredibly easy which of course it is not when you aren't working off a vise.
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Author:
sum (FL)
Interesting. I agree, if the two pieces truly fused into one they shouldn't separate at the original interface line so cleanly, and obviously primer was used.
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Author:
Lworkman (CA)
First heating, and burning, PVC can release deadly Hydrogen Chloride gas! So that should never be done!
Secondly a properly solvent welded joint CANNOT be separated by heating! The inter 1/3 portion of the joint is fused together by the solvents. The outer 2/3's is filled and bonded by PVC, just as solder bonds copper joints.
If you are able to achieve the dis-assembly of PVC joints by heating, the chances of having a pressure capable, leak free joint the second time around!
Edited 1 times.
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