A HCVB is a type of AVB that is specifically designed to be attached to a hose bibb or faucet. A hose is then attached on the downstream side of the HCVB. A HCVB is a spring-lo [...]

An AVB resembles a 90-degree elbow with a hood on top. Internally, there is a poppet check that is pushed closed against a check seat by the incoming water supply allowing wate [...]