Introduction
This manual provides essential information for the installation, operation, and maintenance of your Aquasure Serene Lite AS-SF800CKU Whole House Salt-Free Water Conditioner. This 4-in-1 bundle is designed to enhance your home's water quality by combining a Salt-Free Conditioning/Descaling System, a Fortitude Lite KDF/GAC Water Treatment System, a Pleated Sediment Pre-Filter, and an 8 GPM Light System. It is suitable for homes with 1-3 bathrooms and up to 4 occupants, offering multi-stage filtration and protection against scale buildup.
Please read this manual thoroughly before installation and operation to ensure proper function and longevity of your system.
Product Overview
The Aquasure Serene Lite AS-SF800CKU system provides comprehensive water treatment for your entire home. It addresses common water issues such as sediment, chlorine, VOCs, heavy metals, and scale, while also offering an additional layer of purification.

Figure 1: Aquasure Serene Lite Whole House Water Conditioner System installed in a utility room.
Key Benefits:
- Scale Prevention: Protects plumbing and appliances from scale buildup without using salt.
- Multi-Stage Filtration: Reduces sediment, chlorine, VOCs, odors, bad taste, heavy metals, and iron.
- Purified Water: An 8 GPM light system provides an additional layer of protection against harmful contaminants.
- Extended Appliance Life: Safeguards washing machines, dishwashers, and water heaters.
- High Flow Rate: Maintains water pressure with up to 10 GPM flow.
- Low Maintenance: Features 10-year anti-scale media and requires annual pre-filter changes.

Figure 2: General benefits of the Aquasure Serene Lite system, including scale prevention, extended appliance life, and healthier water.

Figure 3: Specific benefits of the Aquasure Serene Lite salt-free conditioner, such as less soap scum, brighter laundry, and safe for plants.

Figure 4: Contaminants effectively removed by the system, such as soil, rust, sediment, chlorine, heavy metals, and bacteria.
What's Included
Your Aquasure Serene Lite AS-SF800CKU system package includes the following components:

Figure 5: All components included in the Aquasure Serene Lite bundle.
- Fiberglass Reinforced Tank with Pre-filled Anti-Scale Media
- In and Out High-Flow Valve with Distributor Basket
- Fortitude Pro Fiberglass Reinforced Tank with GAC/KDF Media
- Manual Backwashing Valve
- Fortitude High-Flow Housing
- High Flow 30 Micron Pleated Sediment Filter
- 1" to 1" Nipples (Quantity: 4)
- 1" to 3/4" Nipples (Quantity: 4)
- Filter Wrench
- 8 GPM Ultraviolet Sterilizer
- Quartz Sleeve, UV Lamp, + Installation Hardware
How It Works
The Aquasure Serene Lite system employs a multi-stage filtration and conditioning process to deliver clean, treated water throughout your home.

Figure 6: Flow diagram of the Aquasure Serene Lite water treatment process.
- Sediment Pre-Filter: Incoming city or well water first passes through the sediment pre-filter, which captures larger particles, protecting the subsequent filtration stages and increasing overall system efficiency.
- KDF Media: Water then flows through the Fortitude Pro tank containing KDF media. This stage eliminates chlorine, heavy metals, VOCs, unpleasant taste, odors, rust, and prevents the growth of bacteria and algae.
- Salt-Free Conditioner (Catalytic Media): The water proceeds to the conditioner tank, where dissolved minerals are converted into microscopic crystals. These crystals are unable to adhere to pipes and surfaces, flowing through plumbing without forming limescale buildup.
- UV System: Finally, the treated water passes through the 8 GPM UV system, which eliminates harmful waterborne pathogens and microorganisms, providing an additional layer of purification.
Installation and Setup
Proper installation is crucial for the optimal performance and longevity of your Aquasure Serene Lite system. It is highly recommended that installation be performed by a qualified plumber or technician.
Pre-Installation Checklist:
- Location: Choose a dry, level area, protected from direct sunlight and freezing temperatures. Ensure sufficient space for maintenance and filter changes.
- Water Pressure: Ensure your home's water pressure is within the system's operating range (typically 20-100 psi).
- Water Hardness: This system is designed for water hardness levels below 25 grains/gallon.
- Bypass Valve: Install a bypass valve to allow water flow to your home during system maintenance.
- Drain Access: Ensure a nearby drain for backwashing (if applicable to your specific valve configuration) and maintenance.
- Power Outlet: A standard electrical outlet is required for the UV system.
- Tools and Materials: Gather necessary plumbing tools, fittings, and sealant.
General Installation Steps (Consult a professional):
- Turn off the main water supply to your home.
- Install the bypass valve assembly.
- Mount the sediment pre-filter housing.
- Connect the sediment pre-filter to the Fortitude Pro tank (GAC/KDF).
- Connect the Fortitude Pro tank to the Salt-Free Conditioner tank.
- Install the UV sterilizer after the conditioner tank.
- Ensure all connections are secure and leak-free.
- Slowly turn on the main water supply and check for leaks.
- Flush the system as per operating instructions before first use.
- Plug in the UV system.

Figure 7: Example installation of the Aquasure Serene Lite system in a home utility area.

Figure 8: Dimensions of the Aquasure Serene Lite system components for planning installation space.
Operation
Initial System Flush:
After installation, it is essential to flush the system to remove any carbon fines or air from the media.
- Ensure the bypass valve is in the "service" position (water flowing through the system).
- Open a cold water faucet in your home (preferably a bathtub or utility sink) and let the water run for at least 10-15 minutes, or until the water runs clear and free of air.
- Close the faucet.
- Repeat this process for other cold water faucets in your home to ensure all lines are flushed.
Normal Operation:
Once flushed, the system operates automatically. The UV light should remain powered on continuously for effective purification.
- The system does not require regeneration with salt.
- Monitor water pressure and quality periodically.
Maintenance
Regular maintenance ensures the continued efficiency and performance of your Aquasure Serene Lite system.
Annual Maintenance:
- Sediment Pre-Filter Replacement: The pleated sediment pre-filter should be replaced annually, or more frequently if water pressure drops significantly or water quality diminishes. Use the provided filter wrench for easy replacement.
- UV Lamp Replacement: The UV lamp in the 8 GPM sterilizer should be replaced annually to ensure effective disinfection.
- Quartz Sleeve Cleaning: When replacing the UV lamp, inspect and clean the quartz sleeve. If heavily scaled or damaged, replace it.
Long-Term Maintenance:
- Anti-Scale Media: The anti-scale media in the conditioner tank is designed to last for 10 years or 800,000 gallons, whichever comes first. Replacement of the media or the entire tank may be required after this period.
- GAC/KDF Media: The GAC/KDF media in the Fortitude Pro tank also has a long lifespan, typically 5-7 years, depending on water quality and usage.
Always turn off the main water supply and relieve pressure before performing any maintenance.
Troubleshooting
This section provides solutions to common issues you might encounter with your Aquasure Serene Lite system.
| Problem | Possible Cause & Solution |
|---|---|
| Low Water Pressure |
|
| Unpleasant Taste/Odor |
|
| UV Light Not On |
|
| Visible Scale Buildup |
|
If you encounter issues not listed here or require further assistance, please contact Aquasure customer support.
Specifications
| Feature | Detail |
|---|---|
| Model Name | AS-SF800CKU |
| Brand | Aquasure |
| Capacity | 800,000 gallons (Conditioner) |
| Maximum Flow Rate | 10 GPM |
| UV Light Flow Rate | 8 GPM |
| Purification Method | Activated Carbon, KDF55, Salt-Free Catalytic Media, UV Light |
| Special Features | Multi-Stage Filtration, Chlorine Reduction, Scale Prevention, UV Disinfection |
| Material | Fiberglass Reinforced Tanks, Activated Carbon |
| Power Source | Water Pressure (UV Light requires electrical outlet) |
| Filter Life Cycle | 1 year (Sediment Pre-Filter, UV Lamp) |
| Supported Water Hardness | Below 25 grains/gallon |
| Supported Water TDS Level Maximum | 427 PPM |
| Dimensions (UV Sterilizer) | 2.5" W x 27.87" H (approx.) |
| Dimensions (Sediment Filter Housing) | 8" W x 28.5" H (approx.) |
| Dimensions (Conditioner Tank) | 8.5" W x 37.25" H (approx.) |
| Dimensions (Fortitude Pro Tank) | 8.5" W x 40.75" H (approx.) |
Warranty and Support
Aquasure stands behind the quality of its products.
Extended Warranty:
To receive an extended warranty, activate your product online within 60 days of purchase. Refer to the product registration card or Aquasure's official website for details on how to register.
Technical Support:
Lifetime US-based technical support is available for your Aquasure Serene Lite system. For assistance with installation, operation, maintenance, or troubleshooting, please contact Aquasure customer service.
Contact Information: Please refer to the Aquasure official website or your product packaging for the most current contact details.