preventive maintanence
Try telling a qf hostie what to do? They are the main cause for these problems, they are trained but still pour whatever done the sinks because they are lazy, then once the drain is blocked they come bitching to the engineer saying they haven't done their job properly. Engineers have been dealing with this same crap from the beginning! pour the coffee down the toilet and flush the left over ice down the toilets at the end of every sector and pour a couple of mugs of boiling water down the drains at the end of every sector. problem fixed for good, but it will never happen!