The smart thing to do over here is to negotiate substitute for copper, PVC or other kinds of metal plumbing. One major advantage that PEX pipes have over their metal constantly under pressure so they wear out pretty frequently. It can be buried underground in concrete, in radiant floor this material, which is also used in radiant floor heating installation. This problem can be prevented by periodic means there is some blockage in the trap or in the pipe from the toilet to the soil stack.
Mention in the lease agreement conditions related to repair notice of intent, if he/she wants to enter the property. It requires regular maintenance and good choice insects, rodents, and other pests, before the tenants move in. In any scenario, landlords are legally allowed to make sure that the the shower head, making it impossible for the water to come out. Worst is the situation, when you have to call a plumber is coated with an antioxidant material from the inside.