I'm doing laundry & all of a sudden my toilets start bubbling, water is coming up out of the shower drain & the basement drain. Is there anything I can do? Or just call a professional?

Hi all, I am going to be putting in a new 30" bathroom vanity and had a few questions. 1. The water cut-off valves for the sink are about 4-6 inches from the faucet. It is ok to have bends in the connecting tubes, or does it have to be a straight shot? Right now I have polybutyl connecting tubes that I will replace with metal ones. 2. What specifically do I use (caulking, putty, sealant, etc.) to seal the connections between the new faucet and the new connectors? What about between the new drain from the sink (forgot what it's called) and the trap? 3. The cut-off valves are hard to shut all the way. I have them off now, but it wasn't easy. Is this a major problem? I mean, I won't be turning it off anytime in the near future after the vanity is in, but I though that it might indicate a bigger problem. Thanks! :thumbup: