On Thursday, April 11, 2019 at 7:28:26 PM UTC-4, Vic Smith wrote:
On Thu, 11 Apr 2019 14:24:53 -0400, wrote:

On Thu, 11 Apr 2019 11:16:50 -0700 (PDT), wrote:

When working/repairing pvc pipe is it really necessary to use the blue pvc cleaner? Please advise Herb

You can use the clear in the yellow can but if it is being inspected
they want to see a little purple ring on the pipe at the joint. The
cleaner/primer does make the joint much stronger. It breaks the
surface oxidation and allows the cement to penetrate better,

https://www.plumbingsupply.com/the-g...er-debate.html


Couple of things. I assume these tests were done at room temp. IMO, too
many tests at room temp, none at min and max temp. I think min is ~40F?
Solvent could have a more significant effect at temp extremes, perhaps
at low end. And what kind of pipe? Brand new PVC? Or twenty year old
PVC that your are patching onto? Nice and clean? Or with some dirt on
it? Yeah, we know it's supposed to be clean, but we all know what happens
anyway. That solvent is loaded with acetone and you can see it melting
the plastic, so any old surface, some dirt is going to get taken off
and at least distributed around the joint, leaving fresh PVC exposed.
The glue itself is thicker and seems less likely it's going to work past
old PVC, dirt, etc.