Fisher 3990 1/2 Inch M Inlet Atmospheric Vacuum Breaker Assembly with 45 Degree Ledge Mount

The Fisher 3990 Atmospheric Vacuum Breaker is a high-precision plumbing component designed for commercial water systems requiring reliable backflow prevention. This vacuum breaker assembly features a 45° ledge mount configuration with a 1/2" M inlet, ensuring secure integration within various plumbing setups. Engineered for durability and consistent performance, the Fisher 3990 is ideal for use in foodservice establishments, irrigation systems, and industrial facilities where water quality integrity is paramount. Its technical specifications include a model number 3990, lightweight construction at 3.5 lbs, and a stainless steel or brass body option suitable for extensive use in demanding environments. This component effectively prevents water siphoning and contamination, providing a critical safeguard in commercial plumbing lines, especially where backflow risk is high.

Top Fisher 3990 Features

The Fisher 3990 atmospheric vacuum breaker offers precise backflow prevention with a robust brass or stainless steel body, suitable for commercial plumbing applications. It is designed for straightforward installation in ledge-mounted configurations, facilitating quick maintenance and long-term durability. Its 45° mount orientation improves accessibility in tight spaces, while the 1/2" M inlet ensures compatibility with standard plumbing connections. The device withstands operating temperatures and provides reliable airflow control, making it a core component in foodservice water supply systems and industrial wash stations.

• Function and performance: Ensures reliable backflow prevention in commercial plumbing systems.
• Durability traits: Constructed from corrosion-resistant stainless steel or brass for long service life.
• Ease-of-use and maintenance: Simple installation with 45° ledge mount reduces maintenance complexity.
• Real-world fit: Ideal for foodservice water lines, irrigation, and industrial water systems.
• Workflow integration: Compatible with 1/2" standard plumbing fittings, streamlining assembly in various setups.

Suitable for installations requiring backflow prevention in commercial plumbing lines, especially in foodservice and industrial settings.

Fisher 3990 Technical Specs

The Fisher 3990 atmospheric vacuum breaker features a compact design weighing 3.5 lbs, with a model number 3990 and a highly durable construction available in stainless steel or brass, finished to resist corrosion. It operates efficiently within typical temperature ranges, with a maximum working environment suited for standard water temperatures. The device is designed for straightforward installation with a 1/2" M inlet connection, adheres to robust manufacturing standards, and is available for rapid shipping within 7-8 days. Its propylene or metal body construction ensures compatibility with typical foodservice plumbing requirements, offering resilient backflow prevention for ongoing operational safety.

• Manufacturer: Fisher
• Model Number: 3990
• Weight: 3.5 lbs
• Material: Stainless steel or brass
• Temperature Resistance: Standard operating range for plumbing systems
• Connection Type: 1/2" M inlet
• Compatibility: Suitable for commercial backflow prevention needs
• Shipping Time: Typically ships within 7-8 days

• Electrical Requirements: Not applicable
• Construction & Finish: Corrosion-resistant stainless steel/brass with durable finish
• Temperature Tolerance: Operates safely within water temperature norms
• Maintenance & Cleaning: Disassembly for cleaning required periodically
• Installation Clearance: Compatible with standard plumbing setups
• Plumbing Integration: Standard 1/2" M inlet fitting simplifies connection

What is a commercial vacuum breaker assembly?

A commercial vacuum breaker assembly is a plumbing device designed to prevent backflow of contaminated water into the potable supply. This device, like the Fisher 3990 atmospheric vacuum breaker, features a robust mechanism that maintains airflow to avoid siphoning and water contamination within water supply lines. Installed in undercounter or wall-mounted configurations, these assemblies are essential in foodservice environments, industrial wash stations, and irrigation systems. The Fisher 3990 model provides a reliable, corrosion-resistant solution suitable for various commercial plumbing applications, facilitating compliance with safety standards and safeguarding water quality in demanding operational settings.

Top Vacuum Breakers for Foodservice Water Supply Systems

Reliable and durable, top commercial vacuum breakers like Fisher 3990 serve critical backflow prevention roles in foodservice water line installations, designed for moderate workload environments and tight spaces. Fisher 3990 features a compact, corrosion-resistant construction, ideal for maintaining sanitary conditions and operational efficiency in commercial kitchen setups and industrial facilities alike.

• Operation Type — suitable for commercial water safety in foodservice
• Kitchen Setting — ideal for compact food preparation areas
• Backflow Prevention— crucial for maintaining water purity and safety
• Workload Qualification — designed for moderate throughput applications
• Use Case — fitting in water distribution systems requiring reliable airflow control

Why Choose Fisher 3990 Atmospheric Vacuum Breaker

Why Choose Fisher 3990 is due to its high-quality manufacturing, corrosion-resistant materials, and proven performance in protecting potable water systems. Its compact design with a 45° ledge mount enhances installation flexibility, and the 1/2" M inlet simplifies plumbing integration. Engineered for reliable long-term operation, it stands out with its durability and ease of maintenance, reducing downtime and ensuring sanitary standards are maintained without compromise.

• Compact footprint facilitates installation in tight spaces compared to bulkier models
• Corrosion-resistant construction increases longevity in moist environments
• Reliable backflow prevention enhances safety in foodservice water lines
• Standard 1/2" M inlet simplifies plumbing connection and retrofit compatibility
• Ease of maintenance with accessible mounting and straightforward disassembly for inspections