LLigetfa
DIYer, not in the trades
Ja, old fashioned single hose laundry hookups or Y adapters could be to blame if used improperly. Also, they sell aftermarket shutoffs that you place inline with the showerhead, the point being that the shower can be paused while lathering up. The better ones deliberately dribble a small amount through so that you don't use it as a long term off valve, leaving the hot and cold open for crossover.
It still is not clear if there is in fact a crossover. The OP's statements in that regard are contradictory. People can be pig-headed sometimes when they feel they are right and focus only on the "evidence" that support their assumptions. We don't get to hear the landlord's side of it.
It still is not clear if there is in fact a crossover. The OP's statements in that regard are contradictory. People can be pig-headed sometimes when they feel they are right and focus only on the "evidence" that support their assumptions. We don't get to hear the landlord's side of it.