The 1/2" IPS vacuum breaker by Westbrass mounts between the shower hose and outlet, preventing siphoning during pressure variation extremes, thus protecting the water supply. The valve disk is reversible for male to female or female to male flow directions. Hand shower vacuum breaker. Simple inline design fits most hand showers. 1/2" female IPS inlet connects to shower wand. 1/2" male IPS outlet connects to hose. Available in a variety of stylish finishes, this item is sure to complement your existing fixtures. Westbrass Fine Decorative Plumbing since 1935.