Buy online - Amtrol reverse osmosis replacement filters cartridges, under sink Amtrol reverse osmosis RO-4 - 3 stage filters under counter sink, parts for maintenance, service & Repair,  under counter sink Amtrol reverse osmosis 3 stage water filter system cartridges include 2 pre-Filters & a membrane that must be replaced periodically. The different filters represent the different stages that the water goes through while being purified. Generally, Pre-Filters and post-filters in RO systems can last around 8 To 12 months between changes.

Only the original high-quality membrane can last as long as 5 years


Stage 1-
The sediment cartridge is the first filter installed in the Amtrol reverse osmosis water filter system.
The main function of a sediment filter is to remove large and fine particles from drinking water, such as sand, dirt, silt, and rust particles. Removal of such particles allows for a better performance of all the following filters, such as carbon block or GAC filters.
Micron rating: 5 Micron.
Dimensions: 9.75" x 2.5"
Lifetime: Replace every year, depending on the water quality.

This filter is wrapped and sealed and meets NSF Standards and Regulations. The filter will fit any residential reverse osmosis unit & Amtrol Reverse osmosis water filters

stage 2-
Activated carbon block filters are made of fine coconut shell carbon
Remove odors and tastes of many organic compounds, chlorine especially. Though, because these filters are made of a packed carbon (forming a cylinder block), they offer a much finer filtration of suspended particles and dirt.
Micron rating: 5 Micron. Dimensions: 9.75" x 2.5"
Dimensions: 9.75" x 2.5"
Lifetime: Replace every year, depending on the water quality.

the filter is wrapped and sealed and meets NSF Standards and Regulations. The filter will fit any residential reverse osmosis unit & Amtrol Reverse osmosis water filters

Stage 3 -
Amtrol Reverse osmosis under counter sink replacement 75 Gallons per day NSF certified thin film TFC membrane is the main component of the Amtrol Reverse osmosis unit.
Made with 100% Organic fine thin film flat sheet
99% reduction rate of bacteria, pesticides, herbicides, and heavy metals from tap water.
Only the original high-quality reverse osmosis membrane has The micron rating of a thin film less than 1/10000th of a micron which is 620,000 Times thinner than A human hair 2,500 Times smaller than bacteria 20 Times smaller than any virus.


Product Features:
75 Gallons per day (15.8 Liters per Hour) Capacity
99% Stabilized salt rejection (Minimum Rejection 97%) NSF/ANSI standard 58 listed
Operating Conditions Performance specifications based on 500 ppm tap water, 50psi (0.35 MPa) applied pressure, 77°F (25°C) feed water temperature, feed water pH 7-8, and 15% recovery. element permeate flow may vary ± 15%.
Maximum operation pressure: 125 psi (0.86 MPa)
Maximum feed flow rate: 2 gpm
Maximum operating temperature: 113° F (45° C)
Maximum feed water turbidity: 1 NTU
Maximum feed water SDI (15min): 5
Chlorine tolerance: 0
Feed water pH range: 2-11
Minimum brine flow to permeate flow ratio: 4:1

This membrane is wrapped and sealed and meets NSF standards and regulations. The filter will fit residential reverse osmosis unit - PA-E RO-132 Reverse osmosis water filters.