Fisher 3991 1/2 Inlet Atmospheric Vacuum Breaker Deck Mount 200 PSI

The Fisher 3991 Atmospheric Vacuum Breaker Deck Mount 1/2" F Inlet is a commercial-grade vacuum breaker assembly designed for plumbing and sanitation applications within foodservice and beverage environments. Engineered by Fisher, a reputable manufacturer of plumbing components, this vacuum breaker is configured for deck mounting with a 1/2" F inlet, enabling reliable prevention of back-siphonage and cross-contamination. Rated for a maximum static pressure of 200 PSI, it ensures operational integrity under typical commercial water supply conditions, making it suitable for installation in kitchen fixtures, beverage stations, or other plumbing systems requiring atmospheric vacuum protection.

The Fisher 3991 atmospheric vacuum breaker provides dependable backflow prevention with a durable deck mount configuration. Its 1/2" F inlet facilitates straightforward integration into existing plumbing setups, and the unit’s robust materials withstand high static pressures. Designed for moderate-flow workflows, it minimizes maintenance needs while ensuring compliance with plumbing safety standards for commercial foodservice operations. Ideal for system protection in kitchens, dishwashing stations, or beverage service points requiring reliable vacuum advancement and ease of installation.

Secure your plumbing system against backflow in commercial kitchen setups with the Fisher 3991 atmospheric vacuum breaker.

The Fisher 3991 vacuum breaker assembly features a model number 3991, with an inlet connection of 1/2" F fitting, designed for reliable connection to standard plumbing supply lines. Constructed predominantly from corrosion-resistant materials, it withstands typical operating temperatures while rated for static pressures up to 200 PSI. The unit is designed for deck mounting, facilitating easy installation on foodservice sinks or plumbing fixtures. Its straightforward design requires minimal disassembly during regular inspections, promoting simplified maintenance routines. The vacuum breaker's dimensions allow effective space utilization in confined kitchen areas, and its specifications ensure compliance with plumbing safety standards for commercial environments.

Electrical Requirements: Not applicable.

Cooling Method: Not applicable.

Refrigeration Type: Not applicable.

Production Capacity: Not applicable.

Construction & Finish: Corrosion-resistant metal, finish available in standard colors.

Cleaning & Maintenance: Simple disassembly for periodic inspection; no specialized tools required.

Usage Compatibility: Compatible with standard plumbing materials and pressure ranges.

Installation Clearance: Requires clearance for mounting and inspection access.

A commercial vacuum breaker assembly is a plumbing device designed to prevent contaminated water from siphoning back into the potable water supply. It operates by allowing air into the system when negative pressure occurs, thereby breaking the vacuum. The Fisher 3991 model functions effectively within plumbing systems requiring atmospheric backflow prevention, making it suitable for installation in foodservice environments such as sinks, beverage stations, and other fixtures that demand reliable protection against back-siphonage. Its durable construction and straightforward design support continuous operation in mid-volume commercial applications with standard water pressures.

High-quality commercial vacuum breaker assemblies like the Fisher 3991 support safe, continuous water supply in foodservice kitchens, particularly in moderate-demand workflows. Engineered for durability and ease of installation, they ensure consistent backflow protection in busy restaurant or cafeteria plumbing systems. Suitable for typical medium-volume foodservice settings, Fisher vacuum breakers uphold safety and operational standards, making them a core component of restaurant-ready plumbing infrastructure.

Why Choose Fisher 3991? This atmospheric vacuum breaker offers superior durability with corrosion-resistant construction, precise 1/2" F inlet connection, and reliable backflow prevention. Designed for deck-mount installations, it enhances plumbing system safety while facilitating straightforward maintenance. Its robust pressure rating and compact form make it a dependable choice for commercial kitchens seeking long-term plumbing integrity without sacrificing space or ease of access.