Abstract: According to various aspects and embodiments, a modular water filtration system is provided. The water filtration system comprises a housing having an inlet port and an outlet port, at least one filter cartridge disposed within the housing and in fluid communication with unfiltered water introduced through the inlet port of the housing, and a manifold disposed within the housing and having at least one discharge port in fluid communication with the outlet port and at least one conduit in fluid communication with filtered water that has passed through the at least one filter cartridge, the manifold configured to mechanically couple to the filter cartridge.