best faucet water filter

Watts (GTS550S) 5 Stage 50 GPD GTS Series

The GTS550S is capable of producing 50 gallons per day and is small enough to sit on top of a counter top. The GTS Reverse Osmosis System is a 5 stage reverse osmosis system which contains four replacement water filter cartridges and one membrane. Below is a break down of each stage and the compatible replacement membrane and filter part numbers that can be found on our site. 

STAGE 1 : FPMB5-978

STAGE 2 : F109009

STAGE 3 : F109009

STAGE 4 : W-1812-50


Also known as the following part numbers: GTS550S-NAGF-MT, GTS550S-NAGF-PT, GTS550S-AGF-MT, GTS550S-AGF-PT