When the washing machine is going through the empty and spin cycle, the dirty water comes back up through the pipes into my shower. The shower also empties really slowly so i think the drain is a bit blocked.The washing machine is in the kitchen and the bathroom is some distance from the kitchen.How can I fix this problem and what can i put down the drain to unblock it?I live on the 5th floor of an apartment in Spain - there are no trees so I don't think it is roots. I don't even know where the drains are.Is there something that doesn't involve me taking things apart and buying equipment that I don't know how to use? Plus I don't know how to call a plumber...Also, the water is really hard.I don't know what that means, but that is what I was told.
FULL QUESTION HERE - Please answer the question on the forum if you can.