The Nu Aqua Platinum Series represents a line of reverse osmosis (RO) systems designed for residential water filtration. Available in configurations ranging from 5 to 7 stages, these systems aim to improve water quality by removing impurities. Installation requires basic plumbing skills and tools, with an estimated completion time of 40-50 minutes. The systems are identified by product IDs including WU-100GPD-NP, WU-100GPD-NP-ALK, WU-100GPD-NP-UV, WU-100GPD-NP-UV-ALk, WU-100GPD-WP, WU-100GPD-WP-ALK, WU-100GPD-WP-UV, and WU-100GPD-WP-UV-ALk. Incoming water pressure must be between 45 PSI and 80 PSI for systems without a pump; lower pressures may necessitate a pump-equipped model.
System Overview and Models
The Nu Aqua Platinum Series encompasses several RO system configurations. These include 5-stage, 6-stage alkaline, 6-stage ultraviolet, and 7-stage alkaline and ultraviolet systems. The documentation references specific product IDs (SKUs) to differentiate between these models. Related products include the NU Aqua Efficiency Series, HC-UVC1140GPD, HC-UVC1140GPD-SYS, KF-600GPD-2FTL, and various WU-100GPD models with differing features (ALK, UV, ALk-FC, UV-ALk-FC). The systems are designed for use with cold water feed lines only.
Installation Procedures
Installation of the Nu Aqua Platinum Series requires basic plumbing tools, including an adjustable wrench, screwdrivers (flathead and Phillips), a tube cutter (for hard pipe models), and pliers. Teflon tape is necessary for sealing threaded connections, and appropriate pipe fittings/adapters may be required depending on the existing plumbing. Mounting hardware is included for wall-mounted models.
The installation process begins with locating and turning off the cold water valve under the sink, followed by draining any remaining water from the line. A leak stop valve is recommended, though its installation may be deferred until after initial startup. The documentation highlights the importance of inspecting all fittings and tubing upon unpacking to ensure no components were loosened during shipping. If any parts are cracked or broken, installation should not proceed, and the manufacturer should be contacted.
Specific instructions are provided for refrigerator/ice maker kit connections, available separately. For systems with pumps (identified by “WP” in the product ID), specific pump connections are detailed. The documentation emphasizes the need to fully insert tubing into quick connect fittings, removing retaining clips in the process.
System Startup and Sanitization
Prior to system startup, all connections must be thoroughly checked. After connecting the system, the water supply should be turned on slowly to inspect for leaks over a period of 2-3 minutes. A milky colored water appearance during the first week of use is normal and attributed to tiny air bubbles.
To maintain optimal operating conditions, the system should be sanitized annually using a food-grade sanitizer, such as Sani Systems liquid sanitizer. The documentation directs users to Section 6 of the installation manual for detailed sanitization procedures. Before sanitizing, the system must be turned off.
Filter Replacement Schedule
Regular filter replacement is crucial for maintaining water quality. The recommended replacement schedule is as follows:
- Sediment & carbon filters: every 6–12 months (depending on water quality)
- RO membrane: every 2–3 years (or when effluent TDS rises by >10 ppm over feed TDS)
- Post-carbon polishing filter: every 6 months
- Alkaline Filter: every 12 months
- UV Bulb: every 12 months
Potential problems and their solutions are outlined in the documentation. Clogged pre-filters indicate the need for sediment/carbon filter replacement. A fouled RO membrane should be checked for TDS levels, and replaced if necessary. Low inlet pressure (below 45-85 psi) requires verification of upstream pressure. Kinked tubing or valve issues should be inspected and corrected.
Connection Best Practices
The documentation provides guidance on proper connection techniques. Teflon tape should be wrapped 3–4 turns clockwise around male threads. Fittings should be hand-tightened, followed by an additional ¼–½ turn with a wrench, avoiding over-tightening. Proper alignment of fittings is essential to prevent cross-threading and leaks.
Troubleshooting
The documentation addresses a common issue: milky colored water. This is identified as a temporary condition caused by air bubbles and is expected to dissipate with continued use. The documentation also provides troubleshooting steps for common issues, linking them to potential causes such as clogged filters, fouled membranes, or low water pressure.
Warranty Information
The Limited Product Warranty extends only to the original purchasers. Nu Aqua Systems will, at its option, repair or replace the product or refund the cost if a defect is found. The warranty is void if the leak stop valve is not installed.
Service Record
The documentation includes a service record section for tracking filter replacement dates and other maintenance activities. This record includes spaces to document the date of purchase, installation, and the installation technician. It also provides fields to record the installation dates for each filter stage (sediment, carbon, membrane, post-filter, alkaline, and bulb/block filter).
Conclusion
The Nu Aqua Platinum Series offers a range of reverse osmosis systems designed to improve water quality. Successful installation requires adherence to the provided instructions, including proper plumbing connections, system startup procedures, and a regular filter replacement schedule. Maintaining the system through annual sanitization and diligent troubleshooting will ensure continued performance and water purity. The documentation emphasizes the importance of using appropriate tools and safety precautions during installation and maintenance.