bathroom sink & shower don't work

FR supplies no separate cutoff for those fixtures. The best I can offer is to start trouble shooting from the faucet end, remove the shower head and see if you have flow from the hose, remove the hose and see if you have flow from the fixture, etc.

I had a similar problem in my 180 when the cold water in the bathroom sink magical quit working while on a trip. To solve the problem I removed the cold water valve in the bathroom faucet. Attached a piece of hose line with a air tank coupler fitting on the hose to the city water inlet. Then set my air compressor to 40 psi, threw a towel over the removed faucet valve and connected the compressor to the hose and shot air threw the system which blew out what ever was clogging the cold water line to the sink. Presto, no more clogged water line.     

You should also get into the habit of removing the anode rod in the hot water tank after each use.  As it is immersed in water it will degrade slightly and generate white particles that can also clog your faucets.  Also, be sure to use a water filter for the city water line.  That can catch any sediment in the water before it enter the pod water lines.