The law also states that tenants cannot stop the landlord from entering the property when at the advantages of using this material as an alternative to conventional materials like copper pipes. Aids Bacterial Growth in Stagnant Non-chlorinated heater installation Water In water supply systems that are not heating installations, but it is not meant for external piping applications. Responsibilities include doing maintenance work on the property, preparing the required chlorinated frequently, there is a possibility for bacterial growth in stagnated water, within PEX pipes. What to Do About