Resideo - Honeywell Home 50043683-001 Humidifier Water Backflow Prevention Valve

Humidifier Water Backflow Prevention Valve is a critical Resideo - Honeywell Home accessory that protects your home while running a bypass humidifier. This valve is designed specifically for use with bypass humidifiers and works with HM509/HM512 Truesteam models to prevent reverse water flow, guarding your equipment and interior spaces from leaks and humidity spikes.

Engineered for dependable, quiet operation, the valve includes a manual water shut-off for maintenance and safety. It installs quickly with standard fittings, making it a practical upgrade for HVAC systems and humidification installations. Built to endure daily use, it delivers long-term protection against water damage, mold, and unwanted humidity fluctuations—so you can enjoy consistent comfort with fewer interruptions.

• Compatible with HM509 and HM512 (Truesteam) bypass humidifiers
• Prevents backflow to protect HVAC components and plumbing
• Includes manual water shut-off for controlled maintenance
• Durable construction designed for long-term reliability
• Easy installation with standard fittings