1. Safety Information
Please read all instructions carefully before installing and operating the SimPure T1-400ALK water filter system. Failure to follow these instructions may result in product damage, property damage, or personal injury.
- Ensure all connections are secure to prevent leaks.
- Do not expose the system to freezing temperatures.
- Use only genuine SimPure replacement filters.
- Disconnect power before performing any maintenance.
- Keep the system away from direct sunlight and heat sources.
- Ensure adequate ventilation around the unit.
2. Product Overview
The SimPure T1-400ALK is a tankless alkaline reverse osmosis water filtration system designed for under-sink installation. It provides clean, alkaline water by removing over 99.99% of contaminants.
Key Features:
- SGS Certified: Tested and certified against NSF/ANSI 58 standard for material requirements, ensuring quality and performance.
- Alkaline Water: Produces alkaline water, adding beneficial minerals.
- UV Sterilization: Integrated UV sterilizer eliminates over 99.99% of bacteria, algae, and other microorganisms.
- Tankless Design: Saves under-sink space and prevents secondary contamination.
- High Capacity: Produces up to 400 GPD (gallons per day) of pure water.
- Efficient Water Usage: Achieves a 1.5:1 pure-to-drain ratio, minimizing wastewater.
- Integrated Booster Pump: Ensures consistent water flow and pressure.
- Pressure Gauge: Built-in gauge to monitor filter status.

Image: Chart illustrating the SimPure T1-400ALK system's efficiency in removing over 99.99% of 1000+ harmful contaminants, including PFAS, heavy metals, fluoride, TDS, and more, compared to common filters.
3. Setup & Installation
The SimPure T1-400ALK system is designed for under-sink installation. While installation is generally straightforward for DIY enthusiasts, careful attention to connections is crucial to prevent leaks.
Installation Steps:
- Prepare the Installation Area: Clear the under-sink cabinet space. The tankless design saves significant space.
- Mount the Unit: Securely mount the main filtration unit under the sink.
- Connect Water Supply: Connect the system to your cold water supply line. Ensure the connection is tight and leak-free.
- Install Faucet: Install the dedicated filtered water faucet on your countertop. Note that some countertops may require a longer faucet spout than the one provided; extensions may be needed in such cases.
- Connect Drain Line: Connect the wastewater line to the drain pipe.
- Connect Power: Plug the system into a continuous power outlet. Avoid outlets controlled by a switch (e.g., garbage disposal switch).
- Install Filters: Insert the filter cartridges into their respective housings. Ensure they are properly seated and locked.
- Flush the System: Before first use, flush the system according to the detailed instructions in the full manual to remove any manufacturing residues and prepare the filters.

Image: Diagram showing the SimPure T1-400ALK tankless RO system installed under a sink, highlighting the space-saving design and absence of a traditional storage tank.
Tip: Push all tubing firmly into the quick-connect fittings until fully seated to prevent leaks.
4. Operating Instructions
Once installed and flushed, the SimPure T1-400ALK system operates automatically to provide purified alkaline water on demand.
Daily Use:
- Simply open the dedicated filtered water faucet to dispense purified water.
- The integrated booster pump will activate, and you may hear a low humming sound during operation. This is normal.
- The system produces up to 400 gallons of pure water per day, ensuring a continuous supply for your household needs.
- The UV sterilizer operates automatically based on water flow, providing continuous protection against microorganisms.

Image: A family enjoying glasses of water, illustrating the benefits of pH+ alkaline water such as improved hydration, better vitality, taste difference, and higher energy.
Water Efficiency:
The T1-400ALK system boasts an efficient 1.5:1 pure-to-drain ratio, meaning for every 1.5 gallons of pure water produced, only 1 gallon of wastewater is sent to the drain. This is significantly more efficient than traditional RO systems.

Image: Comparison showing the SimPure T1-400ALK's 1.5:1 pure-to-drain ratio, indicating that 1.7 gallons of tap water yield 1 gallon of filtered water, demonstrating superior efficiency over less efficient systems.
5. Maintenance
Regular maintenance, primarily filter replacement, is essential to ensure the continued performance and longevity of your SimPure T1-400ALK system.
Filter Replacement:
- The system features a built-in pressure gauge that serves as a reminder for filter replacement. Monitor this gauge for indications that filters are nearing the end of their lifespan.
- The filters are designed for "3S Filter Replacement" (Simple, Swift, Safe) with a convenient twist-and-lock mechanism.
- Always use genuine SimPure replacement filters to maintain system performance and warranty.
- Refer to the full product manual for specific filter replacement schedules for each stage.

Image: Diagram illustrating the "3S Filter Replacement" process for the SimPure T1-400ALK, showing the twist-and-lock mechanism for easy filter changes and the integrated pressure gauge that indicates when filters need replacement.
General Care:
- Wipe down the exterior of the unit with a clean, damp cloth as needed.
- Do not use harsh chemicals or abrasive cleaners.
6. Troubleshooting
This section addresses common issues you might encounter with your SimPure T1-400ALK system.
| Problem | Possible Cause | Solution |
|---|---|---|
| Low Water Flow from Faucet | Clogged filters, low incoming water pressure, air in the system. | Check the pressure gauge and replace filters if indicated. Ensure the main water supply valve is fully open. Flush the system. |
| Water Leaks | Loose connections, improperly seated filters, damaged O-rings. | Inspect all connections, especially quick-connect fittings, and ensure they are pushed in completely. Re-seat filters. Check for damaged O-rings and replace if necessary. |
| Unusual Taste or Odor | Expired filters, system not flushed properly, secondary contamination. | Replace filters, especially the carbon filters. Ensure the initial flushing procedure was followed correctly. If taste is due to added minerals (alkaline), this is normal. |
| System Not Turning On | No power, faulty power adapter, low water pressure. | Check power connection and ensure the outlet is active. Verify incoming water pressure. Contact customer support if the issue persists. |
| Faucet Spout Too Short | Countertop thickness or sink design requires a longer spout. | Consider purchasing a faucet spout extension or a different compatible faucet if the provided one is insufficient for your setup. |
| High PPM Reading (after alkaline filter) | Alkaline filter adds beneficial minerals, increasing TDS/PPM. | This is normal for alkaline systems. The system is designed to add minerals back into the water. If a near-zero PPM reading is desired, a non-alkaline post-filter might be considered, but this would negate the alkaline benefit. |
7. Specifications
| Feature | Detail |
|---|---|
| Brand | SimPure |
| Model Number | T1-400ALK |
| Product Dimensions (L x W x H) | 39.62 x 13.46 x 39.88 cm (15.6 x 5.3 x 15.7 inches) |
| Item Weight | 8 Kilograms (17.6 lbs) |
| Material | Plastic |
| Installation Type | Under Sink |
| Purification Method | Reverse Osmosis |
| Special Features | Alkaline Pure Water, Integrated Pressure Gauge, Integrated Booster Pump, Tankless, UV Sterilization |
| Capacity | 400 Gallons Per Day (GPD) |
| Pure-to-Drain Ratio | 1.5:1 |
| Power Source | Electric Cable |
| Components Included | Unit (main system, filters, faucet, tubing, etc.) |
8. Customer Support
SimPure is dedicated to providing world-class water filtration solutions. If you have any questions, concerns, or require assistance with your T1-400ALK system, please contact our qualified water specialists.
Our support team is available to answer all questions for the lifetime of the product.
Contact Information: Please refer to the contact details provided in your product packaging or on the official SimPure website.





