Pex Insert Brass Male Adapters - B x MPT are essential components for potable water distribution and hydronic heating systems. Featuring a barb x MPT (male pipe thread) connection, these brass insert fittings ensure a secure and leak-free connection with PEX tubing. Manufactured from standard or lead-free extruded or forged brass, they offer durability, corrosion resistance, and compatibility with residential and commercial plumbing applications.