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.

Abstract: A feeder insert apparatus for a tubular water filtration cartridge utilized in household point of use water filtration systems. The feeder insert allows a chemical to be fed into a incoming water supply at a controlled rate by employing a bypass system that allows a predetermined amount of incoming water to flow past the feed chemical without contacting the chemical. The amount of water in the bypass flow can also be manually adjusted through the use of two adjustment mechanisms, an adjustable ring and a rotatable end cap, located on the feeder insert.

Abstract: A feeder insert apparatus for a tubular water filtration cartridge utilized in household point of use water filtration systems. The feeder insert allows a chemical to be fed into a incoming water supply at a controlled rate by employing a bypass system that allows a predetermined amount of incoming water to flow past the feed chemical without contacting the chemical. The amount of water in the bypass flow can also be manually adjusted through the use of two adjustment mechanisms, an adjustable ring and a rotatable end cap, located on the feeder insert.