LIFETIME WARRANTY ON
TANKS & VALVES
1 YEAR MONEY-BACK
GUARANTEE
INSURED FAST & FREE
SHIPPING
MADE USING CERTIFIED
COMPONENTS
WHY YOU NEED WATER SOFTENER AND CARBON FILTER COMBO
Complete Protection
The RKIN Combo Water Treatment System uses a comprehensive approach to filtering water. It removes sediment, filters chemicals, and contaminants in your water supply while preventing hardness build-up throughout your home.
Filters Out Harmful Contaminants
Remove up to 99.6% of chlorine and other contaminants with our whole house water filter system. It has multiple lines of defense against harmful chemicals and pollutants, including:
Taste, Odor, Chlorine, Chloramine, Haloacetic Acids, MTBE & THM's, Herbicides, Pesticides, and many others.
Softer Skin & Healthier Hair
Eliminate contaminants in the water that can be harmful to your body. By filtering chemicals such as chlorine and chloramine, you can avoid the drying effects of chemicals, promoting softer skin and healthier hair.
Better Tasting Food & Water
With our whole house water treatment system, you can savor the purity in the kitchen.
Filtered water enhances not only the water that you drink but also the quality of the food that you eat. Upgrade your cooking by using cleaner and healthier filtered water.
Why Use a Water Softener
Mineral build-up, or scale, can occur in plumbing and household appliances when your water is hard. Solid deposits of calcium carbonate can form when hard water is heated. This scale can reduce the life of appliances, raise the cost of heating your water and clog pipes. Long-term movement of hard water through a pipe results in scale buildup. This can gradually close up the pipe and lower your water pressure.
Prevent and Reverse Hardness Build-up
Extend the life of your plumbing and household appliances by preventing and reversing scale build-up. OnliSoft Salt-Free water treatment system naturally neutralizes hardness minerals into inactive microscopic crystal particles without salt or any other harsh chemicals.
Comes Install-Ready
All our products come install-ready with minimal assembly required.
RKIN whole house water systems are manufactured in the USA and are made to be installed easily without needing professional help. However, we do recommend hiring a plumber if you are not mechanically inclined.
5 STAGES OF ADVANCED WATER TREATMENT
Efficient - Usage Based Regeneration, Bluetooth and App enabled.
Soft and Filtered Water Made Easy.
MULTI STAGE CARBON FILTER
Stage 1 - KDF Media
Creates a bacteriostatic environment using copper and zinc alloy which helps with the removal of chlorine and heavy metals.
Stage 2 - Catalytic Activated Coconut Shell Carbon Bed
Designed to remove organic contaminants and disinfectant by-products such as chlorine and chloramines.
Stage 3 - EvenFlow Bed
Innovatively designed to maximize water treatment by substantially increasing contact time with the water filtration media.
STAGE 4 - ZEE PRO SEDIMENT FILTER
Designed to protect the water softener media from degrading performance while filtering out sand, silt, clay, and any other sediment.
This 5-micron sediment filter is the largest size available for maximum flow rates and longevity. It's 20 inches high and 4.5 inches wide.
High-Quality Filter Housing with Bacteriostatic Technology will provide years of pain-free filter replacements.
STAGE 5 - RKIN SALT BASED WATER SOFTENER
SALT-FREE VS SALT-BASED WATER SOFTENER
| Water Softener Comparison | RKIN Salt-Based | RKIN OnliSoft Salt-Free |
|---|---|---|
| Salt replenishment is required | Yes | No |
| Drain is required | Yes | No |
| An electric outlet is required | Yes | No |
| Metered Operation for Water and Salt Efficiency | Yes | Not Applicable |
| Bluetooth and Mobile App | Yes | Not Applicable |
INCLUDED PARTS
Carbon & Softener Tanks
ZEE Pro Pre-filter Housing
ZEE Pro Sediment Filter
Sediment Filter Wrench
Bypass Valve (2)
1" MNPT PVC Elbow Fittings (4)
Hose Bib Assembly
Mounting Kit for Pre-filter Housing
OPTIONAL SUPER FLEX KIT FOR 50% FASTER INSTALLATION
Optional RKIN Super Flex Kit makes installation faster and easier.
Eliminates the need to perfectly measure, cut, and glue pipes.
Just place the water system next to the main water line and connect it using quick connects. Some plumbing may be required to ensure the water main is adapted for the water system connection.
- High Flow Capacity
- Made with long-lasting stainless steel
- Quick Connects suitable for 1-inch PEX, CPVC, and Copper
Includes:
- 2 Stainless Steel 24" x 1" Quick Connect Supply Flex Hose
- 2 Stainless Steel 18" x 1" Water Tank Connector Hose
- 2 Zee Pro Filter Housing 1" Nipples
VIDEO REVIEWS
RKIN OnliSoft Pro Saltless Water Softener Combo is featured in the videos below. The salt-based softener combo installation will be very similar, with additional drain and electrical outlet required.
STEP BY STEP INSTALLATION
STEP BY STEP INSTALLATION & WATER TEST
FREQUENTLY ASKED QUESTIONS
Who installs my RKIN water system?
RKIN ships direct from factory, saving you over 60% of the standard retail cost. Our products' user-friendly design makes installation easy with or without professional help. However, if you're not mechanically-inclined, we do recommend hiring a plumber to help with installation. To download the product Manual, please click here.
When I move, can I take my RKIN whole house water system with me?
The RKIN easy-install design makes moving the system between houses a breeze. Just put the system into bypass mode, disconnect it, and take the system with you. The system can be re-installed in your new home with or without professional help.
How often does the RKIN salt-based water softener require salt replenishment?
RKIN CS series salt-based water softeners proactively monitor water usage and regenerate when needed. This "metered" approach ensures maximum efficiency for salt and water usage.
The exact regeneration schedule and salt replenishment requirement will depend on your water hardness and total household water use.
The water softener will regenerate at least once every seven days to keep the media within the system in a top-performing state.
What can I do with the mobile app?
Legacy View mobile app makes setting up and monitoring your RKIN Water Softener easier than ever. A free download of the phone app is available for your iPhone or Android device.
- - Conveniently view all valve settings and status
- - Easily change valve settings
- - View current water usage information
- - Graphically view water usage history
- - Start a regeneration or backwash cycle from your phone or tablet
- - Better understand how your system is working and understand what settings are for
Do I have to use the mobile app?
No, the mobile app is not required. All the settings can be updated directly from the Water System's control board.
The mobile app does make the setup quick and easy.
The bluetooth module on the valve can be disabled and the mobile app can be deleted from the phone after the initial setup.
What is your BBB rating?
We at RKIN are proud to say that we currently have an excellent rating with the Better Business Bureau.
Do you have a technical service help desk?
Yes, RKIN's technical support staff is available by phone at 1-800-803-4551, via contact form, and through live chat, Monday to Friday from 9 am to 5 pm EST. You can also reach us at any time by e-mail with any questions or concerns. Product-specific technical information is also available on each product page, which includes Installation Guides Product FAQ, and Specifications.
Why should I get my water filter system from you?
RKIN specializes in well-built, user-friendly filtration systems made in Florida. Backed by guarantees that go above an beyond industry standards, each of our products comes with an industry-leading lifetime warranty and an unmatched one-year money-back guarantee.
Another factor that separates us from the competitors is our renowned customer service. Conveniently placed in Fort Myers, FL, our home office allows us to provide our customers with reliable and easily accessible help if needed.
How long will it take for me to receive my order?
We provide tracking numbers for all orders via email. All orders usually ship on the same business day. But, sometimes it might take us up to 3 business days to ship your order. Depending on where you are located, the product may take up to 5 business days to be delivered to your home.
What if I have more questions or need support?
Please call us at 1-800-803-4551 Monday to Friday: 9AM-5PM EST or submit a request here.
What is the warranty on the RKIN combo water treatment system?
Lifetime Warranty included on Tanks and Parts. Free shipping on warranty replacements.
For more information on our warranty, please visit www.rkin.com/onlisoft-pro-warranty/
The Electronic and Mechanical Control Valves are warrantied for 7 years.
You get an unconditional one-year money back guarantee with every RKIN whole house water treatment system.
-
SPECS
-
REPLACEMENT COMPONENTS
-
SHIPPING & DELIVERY
-
PRICE MATCH GUARANTEE
-
RETURN POLICY
Whole House Combo Water System Models: CS9WS9, CS10WS10
Download the RKIN Salt Based Water Softener Carbon Filter Combo Manual Here.
| Specification Description | CS9 Carbon Filter | WS9 Water Softener | CS10 Carbon Filter | WS10 Water Softener |
|---|---|---|---|---|
| Bathrooms | 1-3 | 1-3 | 4+ | 4+ |
| Carbon / Grain Capacity | 1 Million Gallons or 10 Years | 32K | 1 Million Gallons or 10 Years | 48K |
| Pre-Filter Replacement | 12 Months | - | 12 Months | - |
| Tank Width | 9” | 9” | 10” | 10” |
| Tank Height with Head | 52” | 57” | 58” | 63” |
| Connection Size | 1” | 1” | 1” | 1” |
| Flow Rate | 11 GPM Service | 11 GPM Service | 15 GPM Service | 13 GPM Service |
Click Here To Expand Specs Table
| Specification Description | CS9 Carbon Filter | CS10 Carbon Filter | WS9 Water Softener | WS10 Water Softener |
|---|---|---|---|---|
| Bathrooms | 1-3 | 4+ | 1-3 | 4+ |
| Carbon Capacity / Grain | 1 Million Gallons or 10 Years | 1 Million Gallons or 10 Years | 32K | 48K |
| Pre-Filter Replacement | 12 Months | 9-12 Months | - | - |
| Tank Width | 9” | 10” | 9” | 10” |
| Tank Height with Head | 52” | 58” | 57” | 63” |
| Connection Size | 1” | 1” | 1” | 1” |
| Flow Rate | 11 GPM Service | 15 GPM Service | 11 GPM Service | 13 GPM Service |
| OPERATING TEMPERATURES | OPERATING PRESSURE | PH RANGE |
|---|---|---|
| 36°F-120°F | 25-80 PSI | 6.5-10 |
| OPERATING TEMPERATURES | OPERATING PRESSURE | PH RANGE |
|---|---|---|
| 36°F-120°F | 25-80 PSI | 6.5-10 |
⚠ IMPORTANT: Before installation, the carbon media inside the tank needs to be soaked in water for a MINIMUM of 2 days.
⚠ CAUTION: Do not install on well water without checking with RKIN customer service representative first.
If the water being filtered is from a public water supply, it will comply with requirements and your RKIN Water Treatment System will substantially improve the water quality.
Your water quality may affect the longevity and replacement frequency of the filters.
ZEE PRO Pre-Filter - Recommended replacement every 6-12 months or as needed.
Carbon Media Replacement - Please refer to the specs for carbon media capacity.
Free standard shipping within US and Canada.
Orders are usually shipped the same or the next business day and delivered within 2-5 business days. Subject to in-region item availability and seasonal carrier shipping performance.
Order tracking numbers are emailed as soon as they become available. If you do not receive your tracking number within 24 business hours, please check your spam folder.
We work diligently to make sure that we offer the best prices for our products online. If you come across another retailer offering a lower price for our products than we are within 12 months of your purchase date, please let us know and we will refund you the difference in price.
We want you to feel confident that you are getting the absolute best price for the product you are ordering from us. If you find that our own website, www.rkin.com, has lowered the price for the same item you ordered within 12 months of your purchase date, please let us know and we will refund the difference in price.
You get an unconditional one-year money back guarantee with every RKIN whole house water treatment system.
Lifetime Warranty included on Tanks and Parts. Free shipping on warranty replacements.
For more information on our warranty, please visit www.rkin.com/onlisoft-pro-warranty/
The Electronic and Mechanical Control Valves are warrantied for 7 years.
TRANSFORM ORDINARY TAP WATER INTO FILTERED, SOFT AND HEALTHY WATER
THROUGHOUT YOUR ENTIRE HOME
Efficient - Usage Based Regeneration, Bluetooth and App enabled.
✔️ Filtered water throughout your entire home
✔️ Showers & baths without chlorine & other disinfection by-products
✔️ Softer skin & healthier hair
✔️ Better tasting water & food
✔️ Protection against hardness build-up
✔️ Ships the same or the next business day
✔️ 1-year money-back guarantee
✔️ Lifetime warranty on tanks & parts
✔️ Made in the USA with certified components
OVER 50% IN FACTORY
DIRECT SAVINGS
100% BEST PRICE
GUARANTEE
EXPERT STAFF
SUPPORT
DESIGNED & BUILT WITH
LOVE IN USA
NEED HELP CHOOSING A WHOLE HOUSE WATER TREATMENT SYSTEM?
NEED HELP CHOOSING A WHOLE HOUSE WATER TREATMENT SYSTEM?
OR
Call us 1-800-803-4551 Monday-Friday 9am-5pm EST
Call us 1-800-803-4551
Monday-Friday 9am-5pm EST
REVIEWS
- Reviews
- Questions
United StatesI'm still in the process of getting it set up
- Choosing a selection results in a full page refresh.
- Press the space key then arrow keys to make a selection.