Hard water minerals can create scale buildup inside pipes, fixtures, and appliances over time. Our Single Tank Upflow Salt-Free Conditioner eliminates mineral buildup, supports better water flow, and protects your home without salt, harsh chemicals, or wasted water.
Our Single Tank Upflow Salt-Free Conditioner manages hard water minerals without traditional salt-based softening. This low-maintenance system supports cleaner plumbing, protects appliances, and eliminates the need for salt bags, electricity, or wastewater discharge.
The Single Tank Upflow Salt-Free Conditioner keeps hard water minerals from sticking to surfaces, pipes, and fixtures. By reducing scale formation, the system protects your plumbing, improves efficiency, and makes everyday cleaning easier.
The water enters the sediment filter, where sediment is filtered down to 0.5 microns for cleaner, clearer water.
Water enters the system carrying calcium and magnesium minerals from your city water source.
Calcium and magnesium in the incoming water are rendered neutral by the Nucleation Assisted Crystallization process, preventing the water from forming scale.
The water leaves the water conditioner and enters the home in a completely harmless state.
| Specifications | CS-SF-10 | CS-SF-15 | CS-SF-20 |
|---|---|---|---|
| Bathrooms | 1-2 | 2.5 – 4.5 | 5 – 6 |
| Tank Width | 9" | 10" | 12" |
| Tank Height | 48" | 54" | 52" |
| Flow Rate | 10 GPM Service | 15 GPM Service | 20 GPM Service |
| Connection Size | 1" | 1" | 1" |
| Operating Pressure | 25 – 80 PSI | 25 – 80 PSI | 25 – 80 PSI |
| Operating Temperatures | 40° – 120° F | 40° – 120 °F | 40° – 120 °F |
| Sediment Change / Replacement | Every 3 – 6 months | Every 6 – 12 months | Every 6-12 months |
| Media Change / Replacement | 5-7 Years, or as needed | 5-7 Years, or as needed | 5-7 Years, or as needed |
| pH Range | 6.5 – 9.5 | 6.5 – 9.5 | 6.5 – 9.5 |
| Hardness GPG Max | 25 GPG ( 427.5 ppm / mg/L ) | 25 GPG ( 427.5 ppm / mg/L ) | 25 GPG ( 427.5 ppm / mg/L ) |
| Iron Max | < 0.3 ppm (mg/L) | < 0.3 ppm (mg/L) | < 0.3 ppm (mg/L) |
| Manganese Max | < 0.05 ppm (mg/L) | < 0.05 ppm (mg/L) | < 0.05 ppm (mg/L) |
| Free Chlorine Max | 4.0 ppm | 4.0 ppm | 4.0 ppm |
Built with the environment in mind, this water conditioning system operates sustainably without generating any waste.
The system effectively eliminates scale from forming and breaks down existing scale in your pipes.
When scale is prevented from forming, it cannot damage your expensive plumbing fixtures and appliances. Saves you money!
The system is designed for easy installation, making it convenient to set up and start enjoying cleaner water throughout your home.
Enjoy peace of mind with a lifetime warranty on the tank and in/out head, and a 5-year warranty on the filtration media.
| Replacement | SKU | Description | Replacement Guidance |
|---|---|---|---|
| Sediment Filter Replacement | CG-SED5-20 | 4.5″ × 20″, 5-micron sediment cartridge | Replace every 6-12 months depending on water quality and household usage. |
| CastleGuard Salt-Free Conditioner Media Replacement Kits | CG-SFC-10R, CG-SFC-15R, CG-SFC-20R |
Shield-Soft™ salt-free conditioning media | Replace every 5 years or after 1 million gallons, or as needed* |
Additional Service Parts
Imagine never lifting a heavy salt bag again! The CastleGuard Water conditioner uses no salt; therefore, you won't have to buy salt or carry those heavy bags into the house and to the softener. Additionally, your water will not have that slippery feel which many describe as difficult to wash off, or the soapy feel in the shower. Because there is no salt, there is also no wasted water in regeneration and no discharge of brine into the drain system and aquifer. You get to enjoy the benefits of softened water without the hassles that can accompany water softeners.
At the heart of this remarkable system is the Shield-Soft™ Media, which uses a process known as Nucleation-Assisted Crystallization to eliminate the minerals’ tendency to form scale. Instead of allowing scale to accumulate in your plumbing, this media inactivates hardness minerals by transforming them into harmless, microscopic crystals that remain suspended in the water and safely pass through the system. This means you can say goodbye to the hassles of scale buildup and the cumbersome task of lugging heavy salt bags into storage.
Vortech® Technology is an advanced water distribution system designed to improve the performance and efficiency of your whole-house water filtration or conditioning system. Unlike traditional systems that rely on gravel bedding, Vortech® evenly distributes water throughout the filtration media, allowing for better contaminant removal, higher flow rates, and more consistent water quality. This innovative design reduces pressure loss, uses up to 30% less water during backwashing, eliminates the need for heavy gravel, and extends the life of the filtration media. The self-cleaning nozzle design also minimizes sediment and iron buildup, resulting in lower maintenance and long-lasting reliability. Whether you’re looking to improve water quality, reduce operating costs, or maximize the efficiency of your water treatment system, Vortech® Technology delivers cleaner water with less waste and greater overall performance.
The Shield-Soft™ media is designed to last up to five years, depending on your water quality, water usage, and overall system conditions. For optimal performance, CastleGuard recommends replacing the media every three years. If your system continues to perform well in years three and four, the replacement interval may be extended, but should not exceed five years.
A CastleGuard salt-free water conditioning system is designed to be low maintenance compared to traditional salt-based water softeners. There are no salt bags to refill, no brine tank to clean, and no regeneration cycle to manage. Routine maintenance may include replacing pre-filters, inspecting system components, and replacing the Shield-Soft™ media within the recommended timeframe.
When properly sized and installed, a CastleGuard salt-free water conditioner is designed to maintain strong whole-home water flow. Choosing the correct system size for your number of bathrooms, household demand, and flow rate is important to avoid pressure loss. If your home already has low water pressure, plumbing restrictions, clogged filters, or sediment buildup, those issues should be evaluated before installation.
The best CastleGuard system size depends on your home's number of bathrooms, fixture count, peak water demand, and service flow rate. Larger homes or households with multiple showers, tubs, and appliances running simultaneously may require a higher-flow system. Proper sizing ensures your salt-free water conditioner can support your home without restricting water pressure.
In many homes, a whole-house filter is recommended before a salt-free water conditioner. Filtration eiliminates chlorine or other contaminants that may interfere with performance or shorten the life of the conditioning media.
A sediment filter protects the Shield-Soft™ media by reducing contaminants that can coat, foul, or clog the media bed. Sediment and other water quality issues can affect the system's performance over time. A properly designed CastleGuard whole-house water treatment system delivers better performance, longer media life, and more reliable scale prevention.
Yes, a CastleGuard salt-free water conditioner may be used on private well water, but the water should be tested first. Well water often contains sediment, iron, sulfur, manganese, tannins, or other contaminants that may require treatment before it reaches the salt-free conditioner. Proper pre-treatment is important for protecting the system and achieving the best results.
Before installing a salt-free water conditioner on well water, you should test for iron, manganese, hydrogen sulfide, sediment, pH, hardness, tannins, and other common well water concerns. Elevated iron, manganese, or sediment can interfere with the media and reduce system performance. CastleGuard can pair the conditioner with the proper well water filtration system based on your water test results.
A salt-free water conditioner does not remove hardness minerals, so a standard hardness test may show similar calcium and magnesium levels before and after treatment. Instead of removing those minerals, the system conditions them to eliminate their ability to form hard scale. This means your water may still test as hard, even though the minerals have lost their ability to bind to pipes, fixtures, and appliances.
No. A salt-free water conditioner does not remove calcium and magnesium like a traditional salt-based softener. Instead, the Shield-Soft™ media uses a conditioning process to transform hardness minerals into microscopic crystals that remain suspended in the water. These conditioned minerals pass through the plumbing system instead of bonding to surfaces as hard scale.
Nucleation-Assisted Crystallization (NAC) removes hardness minerals by converting them into tiny, stable crystals. Once transformed, these minerals are less likely to attach to plumbing, fixtures, water heaters, and appliances. This process eliminates scale buildup without the use of salt, chemicals, electricity, or wastewater discharge.
A traditional salt-based water softener removes calcium and magnesium through ion exchange, replacing them with sodium or potassium. A salt-free water conditioner does not remove hardness minerals. Instead, it eliminates the minerals' ability to bind and form scale, so they can't stick to surfaces and form scale. CastleGuard salt-free systems are a great option for homeowners who want scale reduction without salt bags, brine discharge, or a soft water feel.
No. Salt-free conditioned water typically lacks the slippery feel associated with traditional salt-softened water. Because the minerals are conditioned rather than removed, the water retains a more natural feel. Many homeowners prefer this because they get scale protection without the slick texture of softened water.
During the first few weeks, micro crystals will descale existing plumbing, which can temporarily clog aerators. Users should rinse the mesh fittings on faucets as needed and repeat this during the first year after installation.
A salt-free water conditioner is primarily designed to prevent new hard scale from forming. In some homes, conditioned water aids existing scale in becoming less adhesive over time, but results can vary depending on water quality, the age of the plumbing, and the severity of the buildup. For heavy existing scale, additional cleaning or service may be needed.
Salt-free water conditioners perform best when the water is properly pre-treated and within recommended operating conditions. High levels of sediment, iron, manganese, oil, tannins, or other contaminants can interfere with system performance. A water test is the best way to determine whether a sediment filter or additional treatment is needed before installing a CastleGuard salt-free conditioner. Chlorine must also be at 3 ppm or less to avoid damage to the water conditioner media.
Yes. Water testing is strongly recommended before selecting any whole house water treatment system. A water test helps determine the hardness level, the presence of chlorine or chloramine, iron, manganese, pH, sediment, and other factors that may affect system selection. Testing allows CastleGuard to recommend the right system for your home instead of guessing.
A salt-free water conditioner can be a good choice for many homes with hard water, especially when the goal is scale prevention rather than mineral removal. However, extremely hard water or water with additional contaminants may require pre-treatment or a traditional softener depending on the desired result. CastleGuard can assist in determining the best approach based on your water test and home’s plumbing needs.
No. CastleGuard salt-free water conditioners do not require salt, electricity, or a wastewater drain for regeneration. There is no brine tank, no salt refilling, and no backwashing cycle required for the conditioner itself. This makes it a convenient, efficient option for homeowners who want whole-house scale prevention with less maintenance.
A salt-free water conditioner protects plumbing and appliances by preventing hardness minerals from forming hard scale on internal surfaces. Less scale buildup means better water flow, cleaner fixtures, and improved efficiency in water heaters, dishwashers, washing machines, and other water-using equipment. It is a whole-house solution designed to treat water before it moves throughout your home.
A salt-free conditioner can eliminate hard-scale buildup, but it does not remove hardness minerals from the water. This means some spotting may still occur as water evaporates, especially on glass, faucets, and shower doors. However, the residue is often easier to clean because the minerals are conditioned and less likely to bond tightly to surfaces.
A salt-free water conditioner can be an environmentally friendly alternative for homeowners who want scale prevention without salt discharge or wastewater from regeneration. Because it does not use salt, it avoids brine discharge and reduces the need to haul, store, and refill heavy salt bags. It is also a practical option in areas where salt-based softeners are restricted or discouraged.
Yes. In many homes, combining a CastleGuard whole house water filter with a salt-free water conditioner is the ideal setup. The filter can target contaminants such as chlorine, sediment, taste, and odor, while the salt-free conditioner eliminates scale buildup. Together, they create a more complete whole house water treatment solution.
For city water, the best CastleGuard system typically includes whole-house filtration to eliminate chlorine, chloramine, taste, odor, and other municipal water concerns, paired with a salt-free conditioner to prevent scale. The exact system depends on your city’s water quality, disinfectant type, home size, and desired level of filtration. A water test or local water report can help determine the best setup.
For well water, the best CastleGuard system depends on your water test results. Iron, sulfur odor, manganese, sediment, pH imbalance, and hardness may each require different treatment stages. We recommend a water test be performed on all well water to best assist you with choosing the most appropriate system for your home.
CastleGuard Water Systems Warranty Policy
The CastleGuard Commitment to You
At CastleGuard Water Systems, we stand behind the quality, reliability, and performance of every system we sell. We are committed to transparency, long-term value, and making sure you have confidence in your investment.
Lifetime Limited Warranty
To the original purchaser (“Customer”), CastleGuard Water Systems (“CastleGuard”) warrants that all core system components—including tanks, housings, fittings, valves, bypass assemblies, and filtration media—will be free from defects in materials and workmanship for the lifetime of the system under normal residential use and proper installation.
Additional Component Coverage
To ensure full protection across your system:
• 10-Year Limited Warranty: Large mineral tanks and retention tanks (14” or larger)
• 7-Year Limited Warranty: Electronic control heads and solid-state components
Performance You Can Trust
CastleGuard systems are designed to deliver reliable water filtration performance when installed and maintained according to our guidelines. Specific performance expectations (such as chlorine or contaminant reduction) apply only under proper water conditions and routine maintenance.
What This Warranty Does Not Cover
To keep things clear and fair, this warranty does not apply to issues caused by:
• Improper installation, handling, or misuse
• Physical damage, alterations, or unauthorized modifications
• Failure to follow installation or maintenance instructions
• Lack of routine maintenance (including timely filter/media replacement)
• Water conditions outside recommended system specifications
• Acts of nature (fire, flood, freezing, etc.)
Well Water Requirements
If your system is installed on private well water, certain conditions must be met to maintain warranty coverage:
• No hydrogen sulfide (rotten egg odor), unless properly treated
• No oil contamination
• Copper levels below 1.30 mg/L
• Controlled levels of iron and manganese
If these conditions are present, pre-treatment is required. Our team is happy to help guide you to the right setup.
Simple Warranty Claim Process (Aligned with Returns Policy)
We’ve made our process straightforward and consistent with our shipping & returns policy:
1. Contact Us First – Reach out to CastleGuard Customer Support to begin your claim.
2. Get Authorization (RAC) – A Return Authorization Code (RAC) number is required before sending any item back.
3. Return the Item
– Items may need to be returned for inspection
– Return shipping instructions will be provided
– Standard return shipping applies; expedited shipping is optional at customer expense
4. Repair or Replacement – Once approved, CastleGuard will repair or replace the defective component.
Shipping Alignment
• Warranty replacements are processed and shipped in accordance with our standard order processing timelines (typically 3–5 business days)
• Standard shipping is included unless otherwise specified
• Expedited shipping options are available at the customer’s request and expense
Customer Responsibilities
To keep your warranty active:
• Follow all installation and operating instructions
• Perform routine maintenance as recommended
• Use the system only within designed water conditions
• Retain proof of purchase
Important Limitations
• Warranty applies only to the original purchaser and is non-transferable
• Coverage is valid only at the original installation location
• Warranty begins on the date of delivery
• Labor, plumbing, and service costs are not included
Limitation of Liability
CastleGuard Water Systems’ responsibility is limited to repair or replacement of defective components.
We are not liable for:
• Incidental or consequential damages
• Property damage or water damage
• Loss of use or system downtime
Total liability will not exceed the product’s original purchase price.
Disclaimer
This warranty replaces all other warranties, express or implied, including warranties of merchantability or fitness for a particular purpose.
Governing Law
This policy is governed by the laws of the State of Florida.
We’re Here to Help
Our goal is to make clean, reliable water simple. If you have questions about your system, water conditions, or warranty coverage, our team is here to help every step of the way.
CastleGuard Water Systems Shipping & Returns Policy
Shipping Policy / Free Shipping (Continental USA)
CastleGuard Water Systems offers free economy ground shipping on most orders over $199.00 within the continental United States.
Orders are typically processed and shipped within 3–5 business days from the date of purchase.
Orders placed over the weekend or on holidays will begin processing on the next business day. During high-volume periods, processing times may be extended without prior notice. Once shipped, estimated delivery times range from 3–7 business days, depending on the destination and carrier performance.
Shipping outside the continental United States, including Alaska, Hawaii, and Canada, will incur additional charges, which are calculated at checkout. The customer is responsible for any applicable duties, taxes, or import fees.
Billing Information
Charges will appear on your credit card statement as CastleGuard Water Systems.
Well Water System Orders
CastleGuard Water Systems reviews well water system orders to promote compatibility with the customer’s water conditions; however, final responsibility for system selection rests solely with the purchaser.
• The Company strongly recommends submission of a current water test from a certified laboratory prior to purchase.
• Orders may be placed on hold pending receipt and review of water test results.
• If additional treatment or system modifications are recommended, the customer will be notified prior to fulfillment.
• Orders placed without a valid water test may be processed at the customer’s request; however, the customer assumes all risks related to system compatibility, performance, and effectiveness.
Processing and shipping timeframes begin only after any required review has been completed.
Tracking Your Order
A tracking number will be provided via email once the order has shipped.
Tracking updates are provided by third-party carriers and may be delayed. CastleGuard Water Systems is not responsible for delays or inaccuracies in carrier tracking systems. Please allow up to 48 hours for tracking updates to appear.
Undeliverable Packages
If an order is returned as undeliverable:
• A refund will be issued less all applicable shipping charges and handling costs.
• CastleGuard Water Systems is not responsible for delivery failures caused by incorrect, incomplete, or outdated address information provided by the customer.
• Orders will not be automatically reshipped. Customers must place a new order to receive the product.
Customers must contact Customer Service if:
They believe delivery may fail
They have not received confirmation of a returned shipment
More than three (3) weeks have passed since the estimated delivery date
Refunds are processed within 7–10 business days after receipt and inspection of the returned package.
Refused Deliveries
If a shipment is refused for reasons not attributable to CastleGuard Water Systems:
• The customer is responsible for all return shipping charges
• A restocking fee may be applied in accordance with this policy
All original shipping costs are non-refundable.
Damaged or Lost Shipments
All claims must comply with the following:
• Small-package shipment claims must be submitted within 10 calendar days of delivery
• Freight shipments must be inspected at delivery, and any visible damage must be noted on the carrier’s delivery receipt at the time of delivery
Failure to properly document damage at delivery may result in denial of the claim.
CastleGuard Water Systems reserves the right to require photographic evidence and supporting documentation. Claims processing may take 5–14 business days or longer, depending on the carrier’s investigation timeline.
Order Cancellations & Price Adjustments
Orders may be canceled only prior to entering fulfillment.
• Fulfillment begins when a shipping label is created
• Once fulfillment begins, orders cannot be canceled, modified, or intercepted
• Orders in fulfillment must follow the return process
Cancellation requests must be made by phone. Email requests are not guaranteed to be processed in time.
CastleGuard Water Systems does not offer price adjustments or retroactive discounts. Promotional pricing applies only during the active promotional period and while supplies last.
Approved refunds for cancellations are processed within 7–10 business days.
Return Policy
General Returns
CastleGuard Water Systems accepts returns within ninety (90) days of the original purchase date, subject to the following conditions:
• Items must be unused, uninstalled, and in original packaging
• Products must be free from damage, alteration, or signs of use
Additional conditions:
• Original shipping charges are non-refundable
• Return shipping costs are the responsibility of the customer
• All returns are subject to inspection and approval prior to refund issuance
• Taxes, duties, brokerage fees, and shipping charges are non-refundable
CastleGuard Water Systems reserves the right to deny any return that does not meet these conditions.
Refunds are processed within 7–10 business days following inspection and approval.
Restocking Fees
• A minimum 10% restocking fee applies to all approved non-defective returns
• A restocking fee of up to 25% may be applied for returns requiring additional handling, repackaging, or for refused shipments
Restocking fees are assessed at the sole discretion of CastleGuard Water Systems.
Performance Guarantee
CastleGuard Water Systems offers a 6-Month Satisfaction & Performance Guarantee on eligible products.
• The Company will provide troubleshooting assistance, replacement parts, or corrective recommendations as deemed appropriate
• This guarantee is limited to product performance and does not constitute a full refund policy for installed systems
Installed systems are not eligible for return unless confirmed defective by CastleGuard Water Systems.
For verified defective products:
• Return shipping will be covered by the Company
• A refund or replacement will be issued at the Company’s discretion
• Installation, labor, and related costs are expressly excluded
Product Exchanges
For defective or damaged items:
• Customer must notify CastleGuard Water Systems within 30 days of delivery
• A Return Authorization Code (RAC) and prepaid return label will be issued upon approval
• Replacement will be shipped after inspection and verification
For non-defective exchanges:
• The original item must be returned in accordance with this policy
• A new order must be placed for the replacement item
Limitation of Liability
To the fullest extent permitted by law, CastleGuard Water Systems shall not be liable for any indirect, incidental, consequential, or special damages, including but not limited to water damage, property damage, loss of use, or installation-related costs arising from the purchase or use of its products.
Summary
This policy establishes clear terms governing shipping, returns, and product support. By placing an order, the customer agrees to all terms outlined herein.
CastleGuard Water Systems is committed to delivering a seamless experience built on transparency, efficiency, and customer satisfaction with every order.
