I'm replacing the flooring in my master bath and have had to remove the toilet and vanity/sink to do so. I shut the valves off to the water supply underneath the sink and toilet (sort of oval shaped knobs). I will need to leave them off indefinately to do some other work in there but obviously need water for the rest of the house.
Is it ok to leave them off? Also, is it ok to just have these valves shut off or do i need to go downstairs and shut something else off? New homeowner here...
You should be fine shutting these off as long as nothing disturbs them. If it makes you more comfortable, go to Home Depot and get some anti-flood supply lines and put those on the valve outlet. Also put some small bowls under them to easily monitor if they are leaking or not.
When doing extensive remodeling sometimes those valves get in the way. I actually like to remove the valves as well if they might hinder a future step in my project. Usually they are soldered to 1/2" copper. I unsolder them (Turn water off in basement at main) and replace them with just a simple cap that gets soldered in place.