Review (4/5): Inexpensive.
Unfortunately, it's a "get what you pay for" type of product. At least for my shampoo sink. The threaded pieces weren't compatible with my current hose and nozzle. But, that happens.. my last one wasn't either, (this is my third vacuum breaker) but we were able to use the original pieces to make the fix. Now, my "get what you pay for" part.. when I turn the water on, it releases water out of the top until it builds enough pressure to go straight to the hose nozzle. It's strange.. but it was $30, and I can use my shampoo bowl. Over all.. as of today, when we put it on, it'll do.