Want this question answered?
yes.
it's clogged...
Kitchen sink and washer use same drain line. Drain line clogged causing backup of drainage from washer into kitchen sink. Have drain line unclogged to take care of problem. If drain line not clogged, check for proper venting of drain lines.
A double kitchen sink that is draining slowly could be clogged with debris such as food particles. A snake is a tool that can be found at a hardware store that is used to remove things clogging flow in a drain.
c'est bouché (for your kitchen sink, or the road when coming to a trafic jam) means 'that's clogged'
Your landlord has the responsibility to provide you with habitable premises. If there is another usable sink in the house, it might not be required for the landlord to install a sink downstairs. Also, it is required if the landlord promised or implied that there would be a sink in that bathroom.
It sounds like a clog deep inside the house. A snake might be able to unclog it. It also depends if there is anything else clogged. That will give you a better idea of where the clog is.
Take your snake on the roof and clean the drain from the vent.
You apparently have a creative drain system in your house. Your kitchen sink and your bath tub drains are tied together on the same branch flowing to your main line. I am assuming the toilets are not bubbling or overflowing when the kitchen sink drains. If they are, your main sewer line is clogged. If not, you need to have someone (preferably a plumber) run a cable or snake, as some people call it, through the kitchen sink drain.
Of course as water seeks its own level thus the toilet is NOT effected by a fixture above it
When the kitchen sink backs up in the tub, this usually means that your sewer line is stopped, clogged or blocked up between your house and the asasive tank or your asasive tank is full.
How big is the kitchen sink