Quote:
Originally Posted by gorrilla
pressure rated pvc pipe is perfectly fine to us as long as you dont exceed the rating
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"Pressure Rated PVC" is only rated for liquids under pressure. That means it is NOT rated for gases under pressure.
When liquids are under pressure, and if a crack in the PVC appears, the worst that may happen is a crack appears that releases the water safely and slowly. When gas is under pressure, and is a crack in PVC appears, the result is catastrophic and spontaneous explosion of shrapnel in all directions.
If you want a demonstration of this, take a balloon and fill it with water. Then take another balloon and inflate it with air. Take a knife or a thumb tack and pop the water balloon. Then pop the air-filled balloon.
The water balloon will most likely just kind of split open and spill water everywhere. The air balloon will violently pop and pieces of the latex balloon will fly everywhere. The same thing happens with PVC.
Just because it may say "Rated to 150 PSI" or something on PVC does not mean it works for everything under pressure.