CrabbyAbbry wrote:

PVC isn't a safe product to be used in a closed environment or with land hermits that tend to taste sample their surroundings, or really anywhere for that matter.

It's production includes chlorine and lead and it leaches chemical gases into the air, especially in heated areas. In closed areas like crabitats these dangers are even more harmful.

My largest tank is a reef tank and removing the installed PVC plumbing opens two holes at the bottom of my tank. When I bought it 2 years ago I thought a wise way to address that was to wrap the PVC with sisal rope. It solved the problem and gave the crabs something tall and fun to climb and hang out on. Once I realized the dangers of it I removed the pipe and had the holes sealed with a small square of plexiglass.