Plumbing systems, like everything else in life, require balance in order to operate in an efficient and safe way.

When does a water heater become a boiler and why does it matter, anyway?

The 2015 Uniform Plumbing Code touches on the various methods to prevent backflow and back shiphonage in section 603.3, but diving a bit deeper could be useful.

“Life is like a box of chocolates. You never know what you’re going to get.” As true as this statement is about life, I find it even more accurate when entering public restrooms.