Gardening enthusiasts, here's one more oddball device you can add add to the list of items that A) you weren’t aware exist, and B) didn't know you probably need. Fact is, though, that if your home sits on a space that isn't level, you probably need a Lasco Hose Bibb Vacuum Breaker.
Why would you want a Vacuum Breaker?
Because of the siphon effect: if water in a garden hose is sitting higher than the hose’s connection to the water supply, the water’s weight will force it back through the hose and faucet, straight into the water lines. If a little rubber or vinyl taste in your drinking water doesn’t upset you, it’s your right. But if you’d rather not have dirty water contaminating your home’s water supply, a vacuum breaker is the simple, inexpensive anti-siphon solution. Even if you don’t run hoses uphill, you may still need a vacuum breaker if you often fill water features or other large reservoirs like an above-ground pool.