There are lots of filter companies selling Reverse Osmosis filters, but if you look closely, you'll find that nearly all of them are made in Taiwan or China. While it is not always possible to sell everything that is American-Made, this 4-Stage Reverse Osmosis Filter Pack is entirely made in the USA using NSF Certified Filters. Not only are they made in the USA, they're the best in the industry – Hands Down! You can trust your water to US Water.
4-Stage Filter Pack for RO Systems that do not have a final in-line filter includes silicone to lubricate the O-Rings and RO Sanitizing Solution, so that you can trust you water to be as clean as it can be.
Fits Most Sump-Type Filters Using Three 2-1/2" x 9.75" (10") Housings and with no in-linew filter on the top.
All Filters are NSF Certified for High Purity Reverse Osmosis Systems and are Made in the U.S.A.
(1) 5 Micron Pre-Filter
(2) Carbon Block Pre-Filters
(1) Silicone Packet
(1) RO Sanitizing Packet
It is recommended that filters be changed at 6 or 12 month intervals, depending upon water quality.