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K33 Post Carbon Filter
The Granular activated big post carbon filter is made of high-quality coconut shell activated carbon or nutshell activated carbon, therefore, it does not need any binding agent, and it directly fills the plastic housing. This kind of filter has a good seal performance and a large flow rate. Sintering activated carbon T33 filter uses nontoxic and tasteless efficient coconut shell activated carbon and coal activated carbon as the main body, supplemented by food grade adhesive material, after special craft processing molding, makes the filter both have adsorption effect and filtration effect.
- Estimated Delivery : Up to 4 business days
Big Post Carbon Filter – Final Polishing Stage for RO Water
The big post-carbon filter enhances the quality of water produced by domestic reverse osmosis (RO) systems rated 300, 400, or 800 GPD. It removes lingering tastes, odors, and residual chlorine after the RO membrane, producing fresh and smooth drinking water. Because it acts as the final stage, it ensures every glass tastes clean and pure.
How It Works
Water flows through the big post-carbon filter after passing the RO membrane. The granular activated carbon (GAC) inside adsorbs organic compounds and residual chlorine. As a result, the water becomes odor-free and tastes naturally clean. The filter’s high-quality carbon maintains a consistent flow, while its large size accommodates higher-capacity RO systems efficiently.
Technical Specifications
| Specification | Detail |
|---|---|
| Filter Medium | Coconut shell or coal GAC |
| Outside Diameter | ~2″ |
| Inlet/Outlet | 1/4″ FNPT |
| Length | 9.87″–10″ |
| End Caps | Polypropylene |
| Max Differential Pressure | 58 PSI (~4 bar) |
| Max Inflow Temperature | 52 °C (~125 °F) |
| Max Flow Rate | ~1.0 GPM (~3.8 L/min) |
| Residual Chlorine Removal | >96 % |
| Iodine Adsorption Rate | >950 mg/g |
| COD Removal Rate | >20 % |
Key Benefits
- Improves Taste & Odor: Removes chlorine and organic compounds efficiently.
- Supports High Flow: Large GAC area keeps water moving smoothly.
- Protects RO System: Reduces wear on downstream filters and membranes.
- Durable & Stable: The GAC stays in place for consistent performance.
- Wide Compatibility: Fits 300–800 GPD domestic RO systems.
Installation & Maintenance
Install the cartridge in the post-carbon housing as the final stage of your RO system. Flush with water before first use to remove loose carbon particles. Replace the filter every 6–12 months, depending on water quality and usage. Doing so maintains optimal taste, odor removal, and overall RO system performance.
| Weight | 12 kg |
|---|---|
| Dimensions | 63 × 52 × 49 cm |
Return And Refund Policy
INSTORE EXCHANGES AND REFUNDS
For your convenience, item(s) purchased online may be exchanged or refunded at any Puritech store within South Africa, provided all online return policy conditions are met. A refund will be provided to you by crediting your original method of payment. Please note that cash refunds will not be provided under any circumstances and courier charges cannot be refunded.
Item(s) purchased at any Of Our store within South Africa can only be returned at a Puritech store within South Africa.
Puritech Online Returns Policy
There may be times when you will need to return an item purchased from us. Our Returns Policy is designed to assist you with your return. The benefits given by our Returns Policy are in addition to other rights and remedies you may have as a consumer under the Consumer Protection Act (CPA), as well as any other applicable acts.
If you wish to return any item(s) you have purchased, you can either return the item(s) via courier to our online store or in-person to a Puritech store within South Africa (only) within 14 days from the date of purchase…
We encourage you to return your parcel via Fast Way, Courier Guy, FedEx, or ParcelIt traceable courier services as all returned parcels remain the responsibility of the purchaser until received by Puritech.
Store purchases cannot be returned or refunded online.
Returns Policy Conditions
At Puritech we want to ensure you love the items you purchase. If you have changed your mind on a purchase we will exchange your item or refund your original method of payment provided that:
- You return the item within 14 days (inclusive) from the date of purchase.
- You produce your original Puritech invoice (receipt) when you return the item
- The item is in original saleable condition:
- With all original tags still attached
- In an unopened and unused state
- A return form is completed and accompanies your item(s) being returned
- In original packaging
If you are not able to comply with these requirements, Puritech reserves the right to refuse an exchange or refund on change of mind items. Puritech will not accept a bank statement as proof of purchase.
We regret that we are unable to accept the exchange or return of the following items for change of mind for hygiene reasons:
- Open Filters
- Open Membranes
- Used Reverse Osmosis Systems
Online Exchanges and Refunds
Online Exchanges
If you would like to exchange an item(s) for an alternative item(s), please complete the online Return Request form that is located within My Account under ‘My Orders’ prior to sending the item(s) back.
Exchanges can only be exchanged for the same value of the purchase price of the item being returned.
Your item (s) that you wish to return needs to be sent back to our online returns address with the relevant return documents, duly completed, and a tax invoice (receipt).
If the alternative item is no longer available, provided all the Returns Policy Conditions are met, a refund will be provided to you crediting your original method of payment. All return courier costs will be for your own expense and this will be deducted from your refund amount.
Online Refunds
To obtain a refund please fill out the online Return Request (RMA) form that is located within My Account under ‘My Orders’ prior to sending the item(s) back.
A refund will be provided to you crediting your original method of payment, providing all the Returns Policy Conditions are met and our warehouse has received the original item that is being returned. Cash refunds will not be provided under any circumstances.
COMPLETING A RETURNS REQUEST FORM ONLINE
- Log into your Puritech “My Account” and go to “My Orders”.
- Click on the order that contains the item(s) that you wish to return or request an exchange for and click on the returns button.
- After you have submitted your return request, one of our friendly staff members will get in contact with you to organize a collection.
- Once you have sent your item(s) back to our warehouse, our warehouse will authorize the refund.
Before sending, please ensure all details on this form are correct. You will also need to write the returns number on the outside of the parcel. You will be notified by email of the status of your exchange or refund.
CFK Post Filter 
