1/3HP Insinkerator model 175.60102. Turn it on and all it does is hum, so I guess its getting power. Pushing the reset button does nothing (its not even popped out). I tried to turn it with the allen wrench and it wont even budge, in either direction. No foreign objects visible in it and no one admits to sticking a pry bar in it while it was running. I tried turning it from the top with a piece of wood, no go. Hadnt noticed any performance issues recently, but dont use it often. It is hard wired into the circuit. This may be a red herring but there is a GFI is on the same circuit and I noticed it had been tripped a few days ago, dont know if anyone tried to use the unit since then. Other outlets on that circuit work. When the drain was slow to empty, I would turn it on for a couple of seconds and it would drain. I cant do that now and it takes a long time to drain (but thats probably another issue). Also probably useless, but when I was under the sink I noticed a [I]very[/I] slow leak (a few drops a day) coming from where the romex leaves the unit going to the circuit. I searched for insinkerstor, 5 pages came back, none with this particular problem.

I'm not a plumber, but I've used a snake to clear clogs in drains. Now, the water pressure has dropped to almost nothing in two downstairs sinks (kitchen and bathroom), while the rest of the house is fine. There is corrosion in the galvanized supply lines that are 50-60 years old. Is it safe to shut off the main and snake out the lines to these two sinks?