Fire 2/4 Way FB Inlet The 2-way and 4-way fire brigade inlets (FB inlets) are important components of firefighting systems, designed to provide firefighters with quick and easy access to water in case of an emergency. Here are the advantages of each: 1. Advantages of 2-Way FB Inlet: Compact Design: The 2-way inlet has a smaller and more compact design, making it suitable for smaller buildings or spaces with limited installation area. Cost-Effective: It is generally more affordable than a 4-way inlet, making it a good choice for smaller firefighting systems or buildings with lower fire risk.