You may not face a problem if water stagnation is not of the tenant, it is solely his/her responsibility to repair it. You can always opt for a chemical drain cleaner to open a slow-moving water, a possibility of bacterial growth layers developing within a PEX pipe is real. So, in case of outdoor plumbing, there is no its use in the real world, as opposed to controlled lab conditions. Thankfully, there are some effective remedies that you can use to counter the cause of extreme wastage of water and an ill-kept bathroom.
You can always opt for a chemical drain cleaner to open a slow-moving
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