NSA 100SX Under Sink Model Water Filter

This Product Has Been Discontinued.

We learned in February of 2008 that the NSA 100SX has been permanently discontinued. Further, NSA has sold it's customer list and exited the water treatment industry altogethor. Once the industry's largest brand is now an orphan.

The company NSA sold to offers the same line of H2O International products that we have been recommending as replacement upgrades for NSA filters for 13 years, but at much higher prices than ours.

The most suitable replacement for it is the H2O International US4-13.