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Old 09-27-2008, 07:37 PM   #1
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Do plastic pipes have a shelf life?

I was doing some maintenance of my irrigation system, replacing sections of pvc schedule 40 and 80, 1/2" and 3/4". A stock of material I've had sitting around for at least 8 years seems very brittle, cracking under the pressure of my ratching cutter. Normally my cutter cleanly slices through. Does this stuff age to a point where you shouldn't use it? Should I throw it away and buy new material?


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Old 09-28-2008, 04:45 PM   #2
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Only if it has been sitting out in the weather.


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Old 09-28-2008, 07:56 PM   #3
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In the weather, specifically sunlight! Ultraviolet light will deteriorate PVC. That's why the code requires that PVC vents that penetrate the roof must be painted.

I'd toss it out and get some new PVC just to be safe.
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