Delta Faucet Co U4900-PK Atmospheric Vacuum Breaker

Product Description

The Delta Faucet Co U4900-PK is a chrome atmospheric vacuum breaker designed to prevent backflow in plumbing systems by breaking the siphon effect when supply pressure drops. It features a 1/2-inch connection size and includes a brass shield for added durability and corrosion resistance. The atmospheric design vents to open air, making it a straightforward mechanical solution for backflow prevention without the need for complex check-valve assemblies. This type of vacuum breaker is typically installed by licensed plumbers on hose bibs, sill cocks, and similar low-hazard supply points in residential and light commercial applications.

The U4900-PK is suited for residential and light commercial plumbing installations where local codes require backflow prevention at hose connection points. Its chrome finish makes it appropriate for exposed or semi-exposed installations where appearance is a factor. The brass shield provides mechanical protection to the vacuum breaker body in outdoor or high-traffic service environments. Plumbers working on hose bib retrofit projects or new rough-in installations will find the 1/2-inch connection size compatible with standard supply line configurations.

Key Features

• Atmospheric vacuum breaker design vents to open air for passive backflow prevention
• 1/2-inch connection size fits standard hose bib and sill cock supply lines
• Includes brass shield for durability and corrosion resistance
• Chrome finish suitable for exposed and semi-exposed installations
• Sold individually (unit of measure: each)

Compatibility

Designed as an OEM-style replacement or new-installation vacuum breaker for residential and light commercial plumbing systems with 1/2-inch hose bib or sill cock connections requiring atmospheric backflow prevention.

Installation Notes

Installation should be performed by a licensed plumber in accordance with applicable local plumbing codes and IPC backflow prevention requirements. Shut off the water supply and relieve line pressure before installing or replacing this vacuum breaker. The unit must be installed in the correct flow orientation and positioned above the highest downstream outlet to function properly. Do not submerge the atmospheric vent port or install in a configuration where the vent may be blocked.

Technical Specifications

• Finish: Chrome
• Vacuum Breaker Type: Atmospheric
• Connection Size: 1/2 inch
• Shield Material: Brass
• Weight: 1.6 pounds
• Package Quantity: 6 per case

Standard Information

• Brand: Delta Faucet Co
• Manufacturer Part Number: U4900-PK