Aprilaire 4983 Drain Valve 321042-401 Enhanced System Resilience: Regulates relay

Enhanced System Resilience: Regulates relay ON/OFF cycles for system pumps and louver relays

Universal 1-inch NPSM threads ensure seamless compatibility with most screw-in type residential water heaters

The Nordyne 669770 is a multi-ton valve rated for 2-ton

natural gas

Aprilaire 4983 Drain Valve 321042-401 Enhanced System Resilience: Regulates relayThe Aprilaire 4983 Drain Valve is a critical OEM replacement part engineered specifically for high performance Aprilaire Model 800 series steam humidifiers, including models 800, 865, and 866. This precision built component is essential for managing humidifier water drainage, ensuring that sediment and mineral rich water are efficiently evacuated from the steam canister. By maintaining regular flush cycles, the Aprilaire 4983 prevents mineral buildup