tank pressure

So this is an odd question, however hopefully somebody can help me. I have a self-cleaning litter box for my cats that has to be hooked up to a water source. Unfortunately my landlord will not permit me to hook it up to a water source in the house. So my thought was it might be possible to hook...

I am getting ready to replace a leaking pressure switch when I realize the pressure switch is a 40/60 but the tank is 30/50. The pressure gauge normally reads about 50 psi (which I'm guessing can't be good for the tank). What are your thoughts on replacing the tank with one rated 40/60...