Someone was clearly negligent here, however, I cannot prove responsibility and the blockage was found in unit 1.How would you go about charging the plumber bill?

That will usually clear the blockage and saves me from having to handle the snake (gross).

The danger you run into is that some of that calendar blockage you see could be owner blocks and not paying guests and there's no way to tell.

You know that and so does she.I would tell her she gets nothing for the hotel time during the actual work to repair the blockage (not the first repair) and that she owes you the full cost of the actual repair.

stick your hose or whatever in there and see how far it goes, then lay it on the ground above the pipe and you will see were the blockage is.dig it up, cut the pipe in half, and get the junk out of there. if it is black corragated 4 inch pipe, then you can get a coupling for 3 dollars at home depot and then wrap some duct tape around it. if its DWV pipe or SDR just go get a 4'' coupling for 3 bucks and slap that baby on there, glue is preferred but not needed, there is no pressure.if you are having trouble locating the blockage, try runnin the hose from the drain end of the line not from the gutter downspout end.hope it works, steven

The problem was that the powder laundry detergent (such as Tide) did not disolve completely and had actually cemented together at that exit point to form a partial blockage that interrupted the flow of the water but did not stop it.

Blockage could be caused by a multitude of things already named, as well as silly things like balls or dead birds, or even a collapse of the pipe upon itself somewhere underground.

I am going to get a plumber out to clear the blockage and blow out the line.

Soil conditions, depth of the line, how long is the sewer to be replaced, will they be replacing your landscaping and planting grass afterwards, the list goes on.One other note, here in Cleveland if the blockage is on the downstream side of the clean-out in your yard it is the county's responsibilty to snake the sewer out (free of charge, well, you pay in for it in your city taxes but you get what I mean).

Its usually the cartridge inside the single handle lever that has a blockage or the shower head itself.Price pfister and delta might send you free replacement cartridges if you call up customer service and they help you identify the model.