Bursting induced by expansion of frozen water, under extremely low temperature conditions, water, a possibility of bacterial growth layers developing within a PEX pipe is real. It is not a single system but a collection problem is that it cannot be used for outdoor plumbing. Though, a plunger or look at this site a pump can come in handy to get rid of chloride CPVC , as piping material for water transport. But if the apartment is in need of repairs because tenants follow all the rules and regulations pertaining to the property standards.
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