Re: Non virgin abs
Originally Posted by PLUMBER RICK
This is a problem we saw a lot of many years ago so I am surprised this made it as long as it did. It's not really about non-virgin ABS resins it's about non-ABS fillers. The original standards required only virgin ABS could be used for making ABS pipe and fittings. At some point it was decided you could use non-virgin ABS as a filler material. The non-virgin ABS was a regrind of pipe and fittings which had shape imperfections. The problem came in when a company in Texas started taking old phones, computer cases, old tires and whatever else they could find grinding them up and selling them as non-virgin ABS. When the ABS cement (MEK) was used to assemble the pipe it caused the ABS to separate from the non-ABS materials leaving you with glue line cracks. There is nothing you can do but replace all of the bad pipe.
As we discussed earlier on the phone I would check the build date of the building as the bad stuff was manufactured in 84 through 90. I wonder if it's possible your ground work is okay and the top out is bad?
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