The Watts 105377 employs four proprietary ceramic bead formulations that remineralize purified water while maintaining tight control over mineral release rates. Unlike comparable alkaline filters that release minerals inconsistently and at excessive levels, this filter maintains TDS release at 40 ppm throughout its service life. The controlled release mechanism increases pH to alkaline levels between 8.0 and 9.5 and reduces oxidation-reduction potential (ORP) to between -600 and -150 mV, creating antioxidant-rich drinking water. IAPMO verification confirms filter performance over an 18 to 24 month service interval or up to 3,000 gallons, significantly outperforming competitive filters rated for only 6 months or 800 gallons.

The Watts 105377 alkaline filter installs inline using 1/4" quick connect fittings, making it compatible with most reverse osmosis systems and point-of-use filtration equipment that utilize standard 1/4" tubing. Install this filter as a post-treatment stage after the RO membrane or final filtration stage to remineralize and alkalize purified water before dispensing. The compact inline design fits easily in under-sink installations and requires no special tools for connection or replacement.