Conbraco 38-203-01 Vacuum Breaker

The Conbraco 38-203-01 is a professional-grade 1/2 inch NPT atmospheric vacuum breaker engineered to prevent back-siphonage in potable water systems. Built with a heavy-duty rough brass finish, this backflow preventer is designed for point-of-use protection in commercial plumbing, laboratory, and irrigation applications. It features polypropylene internal softgoods and a corrosion-resistant forged body to ensure reliable sealing under demanding conditions. As a standard for HVACR technicians and contractors, this Apollo Valves model supports a maximum working pressure of 125 psi and handles fluid temperatures up to 212°F. This anti-siphon valve is intended for intermittent use and must be installed at least 6 inches above the highest downstream point. Note that atmospheric vacuum breakers should not be subjected to continuous pressure for more than 12 hours in any 24-hour period. Rely on this plumbing backflow device for its compact footprint and simplified field serviceability when protecting critical water supply lines from contamination.

• Rugged Construction: Forged brass body provides superior durability and resistance to harsh water conditions.
• High-Temperature Rating: Rated for service up to 212°F, making it suitable for hot water supply lines.
• Compact Profile: Ideal for tight installations near fixtures where space is a constraint.
• Simple Maintenance: Designed for easy access to internal components for cleaning or debris removal.
• Reliable Back-Siphonage Protection: Effectively breaks vacuum or siphonage to prevent cross-contamination of potable water.

Where should the 38-203-01 be installed?
It must be installed vertically and at least 6 inches above the overflow level of any fixture or downstream piping it serves. There should be no shut-off valves installed downstream of this device.

Can this vacuum breaker be used under continuous pressure?
No, atmospheric vacuum breakers are designed for intermittent pressure only. Continuous pressure is defined as any period exceeding 12 hours within a 24-hour cycle.

What is the difference between this and a pressure vacuum breaker (PVB)?
Unlike a PVB, an atmospheric vacuum breaker like the 38-203-01 cannot have downstream shut-off valves and is generally limited to applications where spillage is acceptable during air intake.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.