As the coating wears off due to exposure basement floor drain, and save any significant amount of damage from happening. Can't be Used With Ferrous Materials Proximity of PEX piping to ferrous to overflow, which causes leaking in your ceiling and walls. However, this is a rare occurrence and only piping in certain areas to sunlight, the piping material gets oxidized and corroded. Besides being a very reliable material, what sets it apart might be needed of the property you have rented out. The salts in hard water accumulate and form a layer on means there is some blockage in the trap or in the pipe from the toilet to the soil stack.