Forum Discussion
DrewE
Jul 21, 2018Explorer III
Be aware if you use this in winter that PVC pipe becomes rather brittle in cold temperatures, and when it breaks it tends to fail completely. An interesting experiment (that I've read about, not tried myself) is to put a small piece in the freezer overnight and then drop it on a hard floor. I would suggest long pants and shoes if you try this.
This is related to the reasons why one should never use PVC pipe for compressed air: not because it isn't generally strong enough (it is), but because if it fails it will break into many tiny sharp shards that will be propelled away at pretty high speeds. Water or other liquids are different since they are incompressible; once the pressure is relieved even slightly, they don't push the bits of plastic out more and so they don't shoot out with anywhere near the speed.
This is related to the reasons why one should never use PVC pipe for compressed air: not because it isn't generally strong enough (it is), but because if it fails it will break into many tiny sharp shards that will be propelled away at pretty high speeds. Water or other liquids are different since they are incompressible; once the pressure is relieved even slightly, they don't push the bits of plastic out more and so they don't shoot out with anywhere near the speed.
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