cold water line

Helo Forum, I recently purchased a Reverse Osmosis water filter. While trying to install it the instructions assume that there is a flexible line leading from the sink to the water shutoff valve. The instructions mention that if the line is rigid plastic, which mine is, then it will need...

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...