back flow

We are putting in a bathroom in our basement and our contractor installed two new back water valves in the floor of the bathroom. I'm concerned that the access covers to these valves are going to screw up the look of the bathroom floor since they are right in the entrance to the bathroom. Any...

Hey all, I have a couple vacuum breaker sizing issues that I need to sort out. I'm not a professional plumber and I've been asked to explain sizing issues with vacuum breakers in specific situations (this is a weird one, I know). All the information they gave me is this: 'Provide a few sizing...