Lowest Price Online. Just $208 for the Holidays!

ESD-US413 – Under Sink Water Filter – 25,000 gallons

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Lowest price on the Internet!

  • It doesn’t explode! (is that really too much to ask?)
  • It costs less ($208 vs $219)
  • It’s more efficient at contaminants removal (GAC + KDF media vs only GAC)
  • It lasts longer (25,000 gal. vs 12,000 gal.)
  • 5 stage filtration and purification system
  • Hooks up to existing faucet and water feed connector lines
  • Bacteriostatic media: Prevents bacteria growth
  • Improves taste, eliminates odors, removes color
  • Removes hundreds of contaminants
  • Expected Service Life, a whopping: 25,000 gal.
  • Manufacturer’s prorated warranty


Specially designed to replace the antiquated NSA 100S

Designed expressly to replace the discontinued National Safety Associates
(NSA) 100S or the NSA 3000HM filter. NOTE! — As a REPLACEMENT filter, it is presumed that the inlet and outlet connector lines are in place and do not need to be replaced. This filter is shipped with no accessory hardware or connector lines — only the filter to replace an existing installed filter.


If you don’t need to match up water lines exactly like the NSA 100S was installed, there’s an even better deal. It’s the Model US4-R Undersink filter replacement. It’s about three inches taller than the NSA 100S, but it’s rated for an even more economical 35,000 gallons. Here’s the math. For just $10 more you get an additional 10,000 gallons of flow-thru service life. [$10 divided by 10,000 gallons = roughly $0.001 per gallon.] Yep. That’s a TENTH of a penny per additional gallon. Click HERE to check out the US4-R for only $225.00.

Additional information

Weight8.2 lbs
Dimensions16 × 6 × 6 in
Expected Max. Capacity

Up to 25,000 gal. / 132,475 lts.


14" / 35.6 cm.


5"Dia / 12.7cm.

Shipping Weight

8.2 lbs. / 3.7 Kgs.