The Conbraco 38-203-01 1/2 in Atmospheric Vacuum Breaker (AVB) protects potable water systems from back‑siphonage at indoor point‑of‑use fixtures. Compact and corrosion‑resistant, this AVB is designed for easy installation and service where spillage is acceptable and routine maintenance is possible. 1/2 in nominal inlet size; model 38-203-01. Brass body with optional chrome-plated finish; polypropylene internal softgoods for reliable sealing. Rated for 125 psi maximum working pressure and temperatures up to 212°F (100°C). Not for continuous pressure application—maximum 12 hours in any 24‑hour period; install minimum 6 in above downstream piping with no downstream shutoffs. Prevents back‑siphonage of polluted water into potable systems; ideal for irrigation, laboratory, and general plumbing point‑of‑use applications. Compact footprint (approx. 2-5/8 in height) and simple service access; replacement parts and technical documents available. Documents: Installation & maintenance instructions and the submittal sheet are available from the manufacturer. Always verify local code requirements before installation and keep the device accessible for periodic inspection.
