A/C & Heat Bulkhead Inline Push On 4 Port

The A/C & Heat Bulkhead Inline Push On 4 Port from Billet Specialties is a precision fluid distribution manifold designed for custom automotive climate control systems. This bulkhead fitting serves as a central hub for routing refrigerant and heating fluid lines in engine bay installations where space and routing efficiency matter. Built for street rods, custom hot rods, and performance vehicles that demand clean, professional-grade plumbing, this inline manifold eliminates the need for multiple separate fittings and adapters.

Constructed from lightweight aluminum with a polished finish, the A/C & Heat Bulkhead Inline Push On 4 Port features one 10 AN male port, one 6 AN male port, and two 10 AN male ports that convert to 5/8 inch hose barbs for flexible line connections. The polished aluminum construction resists corrosion while maintaining a refined aesthetic under the hood. Each port is precisely machined to ensure leak-free connections, and the inline configuration allows for compact routing along engine compartment walls or frame rails without requiring bulky mounting brackets or adapters.

Professional builders and enthusiasts rely on this manifold when integrating modern A/C and heating systems into classic or custom vehicles where OEM bulkhead provisions don't exist or require relocation. The mixed port configuration accommodates both high-pressure AN-rated hardline refrigerant circuits and lower-pressure hose-barb heater lines in a single compact unit. Installation requires basic hose and AN fitting knowledge; proper sealing of all connections with appropriate fittings and thread sealant ensures reliable operation across seasonal temperature variations and driving conditions.