[MrForbes]

Thanks for your concern, Art, keep it up! I agree that pressurized PVC is a bad thing. I'm not so sure that designs that can't build pressure on the PVC part should be dismissed out of hand, on the vague supposition that "something" could go wrong. If there is a specific concern or scenario that could cause problems, please let us know. Bringing up unrelated cases of bad judgement by engineers or politicians doesn't really help us evaluate this case.