The Aquasure Premier Series Reverse Osmosis system is designed to reduce up to 99.99% of contaminants commonly found in your water supply, including microscopic impurities.
The under-sink system filters water through multiple layers of filtration, then stores purified water in a pressurized reserve tank so it is ready when you need it. Filtered water is delivered through a dedicated drinking water faucet for cleaner, crisp-tasting water right at the sink.
How the 4-Stage Filtration Process Works
The Premier Series uses a four-stage filtration process to reduce particles, chlorine, dissolved solids, and other contaminants for improved drinking water quality and taste.
Each stage has a specific purpose, helping clean and refine the water as it moves through the system.
At the center of the process is the reverse osmosis membrane. The surrounding filters help prepare and polish the water, but the RO membrane does the most precise separation by reducing dissolved solids and microscopic impurities that standard filters cannot effectively capture.
1st Stage: Sediment Filter
The sediment filter is the first line of defense. It helps remove larger particles such as dirt, rust, and other visible debris before the water moves deeper into the system.
This stage helps protect the filters that come after it. By reducing larger particles early, the sediment filter helps keep the carbon filter and RO membrane from becoming overloaded too quickly.
2nd Stage: Carbon Filter
The carbon filter helps reduce chlorine and chemical contaminants that can affect the taste, odor, and quality of your water.
This stage is especially important because chlorine can impact both drinking water quality and the performance of the RO membrane. By reducing chlorine before the water reaches the membrane, the carbon filter helps support the system’s overall filtration process.
3rd Stage: RO Membrane
The reverse osmosis membrane is the core filtration stage. It filters down to 0.0001 microns and removes up to 99.99% of total dissolved solids (TDS) and microscopic impurities.
At this stage, water is pushed through the membrane, which separates purified drinking water from dissolved solids and other unwanted contaminants. The purified water continues through the system.
4th Stage: Post-Carbon Filter or Alkaline Remineralizing Filter
The post-carbon filter is the last filtration step in Premier Series RO systems. It helps further refine the taste of filtered drinking water.
Select Premier Advanced Series models use an alkaline remineralizing filter in this stage instead of a standard post-carbon filter. This filter adds minerals back into the water before it reaches the faucet.
Drain Ratio and Water Efficiency
Reverse osmosis systems send some water to the drain as part of the filtration process. This helps carry away the dissolved solids and contaminants separated from the purified drinking water.
The Premier RO system features a low drain ratio of 1.5:1. This means for approximately 1.5 gallons of purified drinking water, 1 gallon of water is discharged. This is more efficient than many traditional RO systems that may produce 1 gallon of purified water for every 4 gallons sent to drain.
Operating Pressure Requirements
Proper water pressure is essential for optimal system performance.
- Minimum operating pressure: 40 PSI
- Maximum operating pressure: 75 PSI
- Reserve tank pressure: 5–7 PSI
If incoming water pressure is below 40 PSI, a booster pump may be required.
If incoming pressure exceeds 75 PSI, a pressure-reducing valve should be installed to prevent membrane damage.
The Premier Reverse Osmosis system must only be connected to a cold-water line and should never be connected to a hot-water supply.
Premier Series Models
The Premier Series is available in four configurations:
- AS-PR75A: Standard 75 GPD system with post-carbon filter
- AS-PR75AK: 75 GPD system with alkaline remineralization filter
- AS-PR100P: 100 GPD system with LED faucet indicator
- AS-PR100E: 100 GPD system with built-in electric booster pump for low-pressure homes
Both 75 GPD and 100 GPD models use filters with the same replacement schedule. The primary difference is production rate — 100 GPD models replenish purified water faster.
Faucet and Installation Notes
- Recommended faucet hole size: 7/16 inch
- To drill a new hole: start with a 1/4-inch bit and expand to 7/16 inch
During initial startup, water may appear slightly gray due to carbon fines. This is normal. Allow the tank to fill completely and flush the system 1–2 times until the water runs clear.
Connecting to a Refrigerator
The Premier RO system can be connected to a refrigerator or ice maker. For easier installation and balanced water output, an Extra Output Kit is recommended.
Refrigerators may draw up to 20 PSI, which can affect tank refill timing. If issues arise with steady drain flow or slow tank filling, temporarily shutting off the refrigerator connection can help diagnose the cause.
Product Dimensions
RO Base Unit: 14” (L) x 5” (W) x 15” (H)
Storage Tank: 12” (L) x 12” (W) x 15” (H)