Nordyne 664477R Coupling 321702-401 it is a standard component

it is a standard component for hydronic floor heating systems and flow temperature control

making it compatible with a wide range of Lochinvar and A

allowing for accurate HVAC fire safety monitoring

4 FLA at 120V

Heavy-duty brass construction and a durable power head assembly ensure reliable performance under a maximum working pressure of 50 PSIG

Nordyne 664477R Coupling 321702-401 it is a standard componentThe Nordyne 664477R Bulkhead Coupling is a mission critical OEM component designed for high pressure R410A refrigerant applications. Engineered for 3 8" linesets, this brass refrigerant coupling provides a secure, leak proof transition through equipment cabinets, ensuring structural integrity while maintaining a gas tight seal. As a genuine Nordyne replacement part, it is the standard specification for specialized HVAC systems involving brands like