The Under Sink Water Filter (ESD-US413) is designed as a direct, upgraded replacement for discontinued NSA 100S and 3000HM systems. Matching the compact 4″ x 13″ dimensions, this system delivers dramatically superior performance without the bursting risks of older housings. Utilizing an advanced 5-stage purification process combining NSF 61 certified KDF® media with coconut shell granular activated carbon, it removes heavy metals, chlorine, THMs, PCBs, and organic contaminants while inhibiting bacterial growth.

It hooks directly to your existing faucet and water line setups with an impressive 25,000-gallon service life—more than double the original NSA capacity. Ships with a manufacturer’s prorated warranty. Note: Uses base-to-top flow, requiring line swap upon installation.