The Nelsen NRO4-50 is a 4-stage Reverse Osmosis (RO) system designed for residential drinking water applications. Here are the detailed specifications:
General:
- System Type: 4-Stage Reverse Osmosis Drinking Water System
- Manufacturer: Nelsen Corporation
- Daily Flow Rate: 50 Gallons Per Day (GPD)
- Application: Under-sink residential drinking water purification
Stages of Filtration:
- Stage 1: Sediment Pre-Filter
- Function: Removes sediment, rust, dirt, and other solid debris.
- Type: 5 Micron Polypropylene Sediment Cartridge Filter.
- Housing: Clear pre-filter housing for visual inspection.
- Stage 2: Carbon Block Pre-Filter
- Function: Removes chlorine, chloramines, VOCs, and other contaminants that cause bad taste and odor, protecting the RO membrane.
- Type: Solid Block Carbon (e.g., 5 or 10 Micron Carbon Block).
- Stage 3: Reverse Osmosis Membrane
- Function: The heart of the RO system. A semi-permeable membrane that rejects a high percentage (typically 95-98%) of dissolved solids, including lead, copper, barium, chromium, mercury, sodium, cadmium, fluoride, nitrite, nitrate, selenium, and other harmful contaminants.
- Type: Thin Film Composite (TFC) membrane.
- Capacity: 50 GPD.
- Stage 4: Post-Carbon Filter (Inline Granular Activated Carbon - GAC)
- Function: Provides a final "polishing" of the water after it leaves the storage tank, removing any residual tastes or odors.
- Type: Inline Granular Activated Carbon (GAC) cartridge.
System Components & Features:
- Storage Tank: 3.2 Gallon NSF approved storage tank (typically white).
- Fittings: Utilizes push-connect fittings for easy installation. Includes both 1/4" and 3/8" quick connect fittings (3/8" tubing often used for tank and faucet).
- Faucet: Chrome long-reach, lead-free faucet.
- Valves:
- Automatic Shut-Off valve.
- Angle Stop Adapter Valve for connecting to the cold water line.
- Drain Saddle Valve for connection to the drain.
- Included Accessories: Filter wrench for easy cartridge changes, all necessary tubing (e.g., yellow for production, red for waste, white for source).
- Housings: Double O-ring housings for leak prevention.
- Mounting: Typically mounted on a single bracket for compactness and ease of installation.
Operating Conditions (Recommended):
- Minimum Water Pressure: 30 psi (some sources indicate 50 psi for optimal performance).
- Maximum Water Pressure: 100 psi.
- Maximum Water Operating Temperature: 40° - 100°F (4° - 38°C)
- Recommended Max TDS (Total Dissolved Solids): <300 ppm (some sources state up to 2,000 ppm maximum, but lower TDS will result in better performance and membrane life).
- Iron (Max): 0.3 ppm
- Hardness (Max): <15 gpg (grains per gallon)
- Hydrogen Sulfide: 0.0 ppm
- Manganese (Max): <0.05 ppm
- Turbidity (Max): <1 NTU
- pH Range: 3-11
Dimensions (Approximate - Main Unit without tank):
- "Footprint" space roughly 5" deep x 16" long x 18" high.
- Storage tank is approximately 11" wide x 14" high.
Maintenance (General Guidelines):
- Sediment & Carbon Pre-Filters (Stages 1 & 2): Recommended change every 6-12 months, or as needed based on water quality and usage.
- RO Membrane (Stage 3): Recommended change every 24 months (2 years) or based on periodic TDS rejection tests.
- Post-Carbon Filter (Stage 4): Recommended change every 6-12 months.
Warranty:
- Components typically warranted for three years from installation (excluding membrane, pre & post filters).
- Holding tank typically has a five-year warranty.
This information is compiled from various sources and represents typical specifications for the Nelsen NRO4-50 RO system. Specific details might vary slightly based on the exact model year or distributor. Always refer to the product's official user manual for the most accurate and up-to-date specifications.