1. Product Introduction
The ALTHY PRE-AUTO2 Automatic Flushing Backwash Prefilter is designed as a primary water treatment device for your entire household. It effectively filters out sediment, rust, and granular debris from your water supply, thereby extending the lifespan of downstream water equipment such as water heaters, washing machines, and RO water purifiers.
Constructed with high-quality materials, including HPb59-1 copper parts, an engineering plastic shell, and a 316 stainless steel filter screen, this prefilter ensures durability and long-term performance. The filter element is designed for repeated cleaning and reuse, offering a cost-effective solution for water purification.
Key features include a 40-micron filtration accuracy, a scientifically matched 70-90µm double filter screen, and a robust filter bottle capable of withstanding burst pressures up to 80 kg and over 150,000 water hammer tests. It is also tested for freezing resistance down to -30°C and pressure up to 1.05MPa.
The system incorporates an innovative automatic flushing function, allowing you to set cleaning cycles for every 7, 15, or 30 days, or initiate an immediate flush manually. A built-in water pressure gauge enables real-time monitoring of your water system's pressure.
2. Safety Information and Precautions
- Installation, debugging, and maintenance should ideally be carried out by qualified professionals.
- Install the product in a dry indoor environment, away from direct heat sources and out of reach of children.
- This product is suitable only for municipal tap water with a temperature range of 5-50°C (41-122°F). Do not use it with wastewater or corrosive liquids.
- Ensure the water flow direction marked on the valve body is consistent with the pipeline flow direction during installation.
- A reliable drainage system must be in place at the installation position. The sewage outlet should be perpendicular to the ground.
- Regularly flush the filter at least once a month, or more frequently depending on local water quality.
- Protect all parts during cleaning and maintenance.
- It is strictly forbidden for the unit to freeze during operation.
- Avoid battery short circuit. If installed outdoors, equip with a sun visor for waterproof protection.
3. Product Part Names
Familiarize yourself with the main components of your ALTHY PRE-AUTO2 prefilter:
- Month record table
- Pressure gauge
- Copper body
- Filter bottle
- Lower shell
- Upper shell
4. Setup and Installation
This section provides step-by-step instructions for installing your ALTHY PRE-AUTO2 prefilter. Ensure you have all necessary tools and components before beginning.
4.1. Preparation
- Close the main water inlet valve to your property.
- Vent any remaining tap water from the pipes.
- Ensure that the copper valve head and the filter bottle are securely tightened.
4.2. Adapter Preparation
- Wrap the outer threaded ends of the two sets of adapters (G1" to G3/4" MNPT Connectors) with several turns of raw material tape (e.g., PTFE tape).
- Screw these adapters into the PPR female threaded connectors (note: PPR female threaded connectors are not included and must be supplied by the user).
- Tighten the connections using an appropriate tool.
4.3. Connecting the Filter
- Connect the filter unit directly to the main water pipe. Ensure that the white gasket is correctly placed within the union nut before tightening.
- Tighten the union nuts at both ends of the copper valve head to secure the filter in place.
5. Operating Instructions
5.1. Initial Start-up
After installation is complete and all connections are secure, slowly open the main water inlet valve. The system is now ready for operation.
5.2. Automatic Flushing Function
The ALTHY PRE-AUTO2 features an automatic flushing mechanism to prevent filter clogging and maintain optimal performance. You can customize the flushing interval:
- Setting Flush Interval: Press the "Settings" button on the unit to cycle through the available options: 7 days, 15 days, or 30 days. Select your desired interval.
- Automatic Flush Cycle: Once set, the electric ball valve will automatically open for 30 seconds at the chosen interval to flush out accumulated sediment. The buzzer will sound, and the indicator will flash during this process.
5.3. Immediate Flushing
If you need to flush the system immediately, for example, after a period of heavy water usage or if you notice reduced water flow:
- Press the "Flush" button on the unit.
- The buzzer will sound, and the electric ball valve will open for approximately 500 milliseconds, then close. It will then open again for 30 seconds to complete the flush cycle before closing.
5.4. Water Pressure Monitoring
The prefilter is equipped with a built-in water pressure gauge to monitor real-time water pressure. The general household water pressure range is 0.1MPA-1MPA (1-10 bar). If the pressure is abnormal, take appropriate measures to address the issue.
6. Maintenance
Regular maintenance ensures the longevity and efficiency of your prefilter.
6.1. Filter Cleaning and Disassembly
While the automatic flushing function handles routine cleaning, periodic manual cleaning of the filter element is recommended, especially if you notice reduced water flow or heavy sediment accumulation. Professional cleaning every 8-12 months is advised.
- Drain Water: Close the main water inlet valve. Touch the flush button, then open the drain ball valve to release pressure and drain any remaining water from the system.
- Unscrew Filter Bottle: Use the special wrench provided to turn the accessory kit counter-clockwise and unscrew the filter bottle from the main unit.
- Remove Filter Kit: Carefully take out the entire filter kit assembly by pulling it upwards.
- Clean Filter Components: Take out the spin-scraper accessories and the filter screen. Rinse them thoroughly under running water to remove any accumulated debris. Avoid harsh scraping or backwashing that could damage the filter mesh.
- Reassembly: Reassemble the filter components in reverse order, ensuring all parts are properly seated and tightened.
6.2. Filter Element Replacement
The filter element should be replaced every 2-4 years, depending on your water quality and usage. Follow the disassembly steps above to access and replace the filter element.
6.3. Battery Replacement
The automatic flushing function is powered by three AAA batteries. These batteries are not included in the package due to logistics restrictions and must be purchased separately. Replace them as needed to ensure continuous automatic flushing.
7. Troubleshooting
This section outlines common issues and their solutions.
| Failure Phenomenon | Possible Causes | Solution |
|---|---|---|
| No water flow | No water supply to the property or main water inlet valve is closed. | Verify water supply and fully open the main water inlet valve. |
| Small water flow | Main water inlet valve not fully open or filter surface is partially blocked. | Fully open the main water inlet valve. Rinse the filter screen and clean up any debris. |
| Water seepage at the joint | Filter parts were disassembled incorrectly, loose parts, insufficient raw material tape at threaded connections, or aging/damaged rubber sealing ring. | Check if the sealing ring is misplaced or fallen off. Re-tighten the threaded joint with a wrench. Re-wrap the raw material tape and tighten. Replace the rubber seal if damaged. |
8. Specifications
| Attribute | Value |
|---|---|
| Brand | ALTHY |
| Product Name | Automatic Pre-filter |
| Model Number | AL-PRE-AUTO2 |
| Product Size | 308 x 114 x 117 mm |
| Filtration Accuracy | 40 μm |
| Purified Water Flow | 5.0 m³/h (approx. 25 GPM) |
| Water Inlet Pressure | 0.1 - 1.0 MPa (1 - 10 bar) |
| Applicable Temperature | 0 - 40 °C (32 - 104 °F) |
| Influent Water Quality | Municipal Tap Water / Well Water |
| Backwash Function | Yes (Automatic) |
| Anti-Electric Shock Level | III |
| Smart Cleaning | Yes |
| Rated Voltage | 5V |
| Rated Power | 2W |
| Power Source | 3 x AAA Battery (not included) |
| Material | SUS 316L Stainless Steel Mesh, Lead-free brass, BPA-free housing |
| Certifications | CE, RoHS, FDA, ISO9001 |
| Installation | Cold Water Pipe Installation |
| Use | Household Pre-Filtration, Central Purification |
9. Package Contents
The following items are included in your ALTHY PRE-AUTO2 package:
| Item | Quantity |
|---|---|
| ALTHY PRE-AUTO2 Prefilter | 1 |
| User's Manual | 1 |
| Special Wrench | 1 |
| G1" to G3/4" MNPT Connector | 2 |
| White Gasket | 2 |
| PE Sewage Pipe | 1 |
10. User Tips
- For outdoor installations, consider adding a sun visor to protect the unit from direct sunlight and ensure waterproof integrity, preventing potential battery short circuits.
- Many users report significant improvements in water quality, noting a reduction in sediment and sand, which can alleviate issues with washing clothes and other household water uses.
- The included PE pipe for flushing is a useful component, especially if you plan to install the unit within an enclosure or box.
- While the automatic cleaning feature is effective, in areas with very high sediment or 'stones' in the water, manual cleaning of the cylinder filter might be necessary if water pressure drops significantly.
11. Warranty and Support
For detailed warranty information and terms, please refer to the official user manual PDF available at: ALTHY PRE-AUTO2 User Manual (PDF).
If you have any questions regarding installation, compatibility, or require technical assistance, please contact ALTHY customer service. Contact information can typically be found on the product packaging or the official ALTHY website.
