H2O (H2O-US4-13) Inline 5 Stage Under Sink Filter (Replaces NSA 100 Models) Filmtec (NF-4040) NANO Filtration Membrane 6 Inspect annually during lamp replacement

Inspect annually during lamp replacement

Use on both residential and light commercial applications where UPC or IPC codes mandate airgap protection between potable water equipment and drain connections

5" cartridges and 1" ports engineered to maintain flow rates up to 8 GPM without pressure loss

💧 The Twist Tap shutoff valve built into Q-Series heads means you can swap this cartridge without shutting off your main water supply or dealing with spills—just twist off the old filter and the valve closes automatically

Viqua's 100% fused silica construction allows maximum UV energy to reach the water while keeping the lamp dry and operational

H2O (H2O-US4-13) Inline 5 Stage Under Sink Filter (Replaces NSA 100 Models) Filmtec (NF-4040) NANO Filtration Membrane 6 Inspect annually during lamp replacementH2O Water Systems H2O US4 13 Inline 5 Stage Under Sink Filter Direct replacement for discontinued NSA 100S and NSA 100SX models with proven 20 year track record 2 GPM Flow Rate 3 Year Filter Life NSA 100 Retrofit Complete Install Kit The H2O US4 13 (model H2O US4 13) connects inline with your existing faucet using the same tubing dimensions and fittings as the original NSA 100S and NSA 100SX systems. This five stage under sink filter delivers