Plumbing – Remove adjustable pipe clamp without head

If the spanner you have is the type with a screwdriver type handle a slight rap on the top may help. Most faucet handles are made of an aluminum like potmetal. The most effective crust-buster I have found for this type of material is ammonia straight out of the bottle. Pour it over the handle and let it sit. It may help to soak a rag and leave it on top. Do this for several days (patience is a virtue) if you can, avoid using the faucet. Insert the spanner and tap it lightly with a hammer. The idea is to break up the scale between the individual threads. If you can safely do so kneel on the counter so you can add your weight to the driver to prevent it from slipping. If all else fails drill the heads off the screws. If you remove just the heads a bit of threads should remain exposed out of the stem that you can grab with pliers.

The drain line is probably filled with hair and soap, chemical drain cleaners at best push the clog further down and make things worse in my opinion (now toilet backing up) with the exception of “mule kick” that will eat metal pipes and I am not sure if it is even available any longer. What you need is a real snake a small one to be run down the shower, and possibly a larger power one to be run down the toilet. Without cleaning the clog this will get worse this kind of snake you hold in one hand and spin pushing it down the drain a little at a time probably less than 2 or 3 chemical treatments. You should have the land lord take care of this incase any damaged pipe or other problems come up and you are not taking the $ hit for something that should be fixed by them.