@maindaf16 I found this...
"DON'T MIX PVC PIPE AND POLYETHYLENE GREENHOUSE FILM"
https://sites.udel.edu/weeklyc...
Here's some highlights...
This guy had giant holes in his less-than-one-year-old five-year greenhouse film. The holes corresponded to areas of wear in places where the plastic touched the PVC. The pvc out-gases chlorine which destroys the UV light stabilizers in the polyethylene greenhouse film and causes the film to degrade.
There is a sizable list of materials that can react with greenhouse film and cause wear including any type of PVC pipe or PVC tape, oil based paints or wood preservatives, chlorine based disinfectants, and certain pesticides, especially those containing sulfur or copper.
To prevent premature wear to greenhouse film, manufacturers recommend that surfaces that the film touches should be covered with white acrylic latex paint (but not the mildew resistant kinds that contain fungicides) or non-PVC tape. The film should not be in direct contact with any of the materials listed above that can cause breakdown or wear. In fact failure to follow these recommendations can cause the warranty on the film to be void.
Another solution would be covering the conduit with pipe insulation made out of polyethylene, which is readily available and inexpensive.
Hope this is helpful!
