We just had a plumber replace a leaking frost free outdoor faucet that was original to our house. He told us he used a commercial grade hose bib with a vacuum seal. When the hose is attached and the water first turned on water sprays out through the vacuum breaker until the seal is made (or at least that's what the plumber said about it). I've noticed today that when I turn off the faucet when a hose is attached that water sprays out all over through the vacuum seal getting the house and me fairly wet until the pressure is relieved. This happens with the hose sprayer open or closed. I've tried several different ways, but it seems that now matter what the wood house and me both get wet. Is this normal? Did he use the wrong kind of hose bib? It looks nothing like the frost free we replaced on our front faucet and we have no problems with spraying from it.

Thanks!