The invention provides a fluid delivery assembly for use with a water discharge fixture, such as a faucet. The fluid delivery assembly includes a tube assembly, a cartridge housing and a retaining assembly. The fluid delivery assembly provides for water flow from hot and cold water inlets to the faucet. The fluid delivery assembly may be assembled by hand without the need for tools, allowing for easy replacement of the fluid delivery assembly without the need to disassemble the faucet assembly or to replace the entire faucet assembly.