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Pentek GS10-CAL/RO Alkaline Filter
₺2,171.76
VAT included · In stock · Free shipping
Installation is a service · plumbing is the customer’s responsibility
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Across Türkiye
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Across Türkiye · 1–3 business days
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- SKU
- WP-SF-007
- Category
- Water Filters, Water Treatment Spare Parts
Pentek · Calcite + Coconut Carbon · Final Stage
Pentek GS10-CAL/RO Alkaline Filter
The Pentek GS10-CAL/RO Alkaline Filter is an inline final-stage cartridge that raises the pH of water after reverse osmosis and remineralises it; its blend of calcite and coconut shell granular activated carbon brings the pH back towards neutral while markedly improving the taste.
- Contents
- Calcite + GAC
- Size
- 10" × 2"
- Its Role
- pH & Minerals
01Problem & Solution
Why Does Treated Water Turn Acidic?
Problem
Low pH and a Flat Taste After RO
A reverse osmosis membrane holds back most of the minerals in the water as well. That can lower the pH and leave the water soft, acidic and flat on the palate.
Solution
Balancing pH with Calcite
The Pentek GS10-CAL/RO Alkaline Filter raises the pH towards neutral as calcite, a natural mineral, dissolves in the acidic water. At the same time the carbon stage improves taste and odour.
02Key Features
Balanced pH, Better Taste
The Pentek GS10-CAL/RO Alkaline Filter is designed to put the finishing touch to treated water.
pH Balancing
Calcite dissolves in acidic water and raises the pH towards neutral.
Remineralisation
Adding minerals back to soft, low-pH water restores its character.
Coconut Activated Carbon
Coconut shell granular activated carbon reduces any remaining traces of taste, odour and chlorine.
Better on the Palate
It markedly improves the taste of the water for making coffee, tea and other drinks.
Easy Inline Fitting
Fitted in the line, it integrates easily into existing reverse osmosis units.
Certified Manufacture
Made by Pentek, a long-established name in filtration, and NSF certified.
03Technical Specifications
Filter Specifications
| Feature | Value | What it does |
|---|---|---|
| Model | Pentek GS-10CAL/RO | The manufacturer’s model code. Spares and service are matched by this code. |
| Type | Inline Final Stage | The product sub-class. When buying a spare it has to match the one you already have. |
| Filter Bed | Calcite + Coconut GAC | The treatment media in the vessel. This is the bed the water passes through. |
| Size | 10" × 2" | The physical size. If a spare does not match this, it will not go into the housing. |
| Flow Rate | ~3.8 L/min (1.0 gpm) | How much water passes through per unit of time. A low flow rate drops the pressure when more than one tap is open. |
| Max. Pressure | 125 psi (~8.6 bar) | |
| Weight | 1 kg | Product weight. For wall mounting, the supporting surface is chosen accordingly. |
| Dimensions | 5 × 5 × 26 cm | The outer dimensions of the unit. The cabinet or plant room has to be wider than this. |
04Applications
Where Is It Used?
The Pentek GS10-CAL/RO Alkaline Filter is used wherever the pH and taste balance of treated water matters.
- Reverse Osmosis Units
- Homes
- Offices
- Coffee & Espresso Machines
- Tea Machines
- Cafés
- Water Dispensers
- Filter Renewal
05How It Works
How Does the Pentek GS10-CAL/RO Alkaline Filter Work?
Fitting in the Line
The cartridge is fitted inline on the reverse osmosis unit’s outlet, between the tank and the tap.
Treated Water Enters
The soft, low-pH water leaving the reverse osmosis unit is directed into the cartridge.
The pH Rises on the Calcite
Calcite, a natural mineral, dissolves in the acidic water in a controlled way and raises the pH towards neutral.
The Carbon’s Finishing Touch
The coconut activated carbon stage takes out any remaining traces of taste and odour, improving the water one last time.
On to the Tap
The water, now pH-balanced and better tasting, goes to the tap; the cartridge is replaced at the end of its life.
06Making the Right Choice
What Determines the Right Cartridge
When choosing the Pentek GS10-CAL/RO Alkaline Filter, the connection size and its position in the system must be established correctly.
Connection Size
The connection type varies by model variant; your unit’s fitting size should be confirmed.
Position in the System
This is a final-stage cartridge and should be fitted at the reverse osmosis outlet, before the tap.
What You Expect of pH and Taste
If your treated water tastes flat or acidic, this calcite cartridge makes a clear difference.
How Heavily It Is Used
Heavy use shortens cartridge life, and a drop in flow is the clearest sign that it is time to change.
07Maintenance and Use
Notes That Keep It Performing
- The cartridge should generally be changed every 3-6 months, and sooner than that if the flow drops noticeably.
- Running the first water off for a while after a change is recommended, to flush out any fine dust in the cartridge.
- Fit the cartridge the way the flow arrows indicate; fitted the wrong way round, it will not do what it should.
- The connections should be checked for leaks, and fitting is best carried out by a technical service engineer.
08Frequently Asked Questions
Common Questions
What does the Pentek GS10-CAL/RO Alkaline Filter do?
It raises the pH of water after reverse osmosis and remineralises it. The calcite inside dissolves in the acidic water and brings the pH back towards neutral, while the coconut activated carbon takes out remaining traces of taste and odour to improve how the water drinks.
What is calcite and how does it work?
Calcite is a natural mineral. In contact with acidic water it dissolves in a controlled way and raises the pH towards neutral, balancing out the drop that reverse osmosis causes.
Does it treat water on its own?
No. This is a final-stage (post-filter) cartridge fitted at the outlet of a reverse osmosis system to improve the pH and taste of the treated water. The main treatment is done by the pre-filters and the membrane.
When is it changed?
It is generally changed every 3-6 months. The interval varies with water quality and how heavily the unit is used, and a noticeable drop in flow is another sign that it is time.
Will it fit my unit?
This 10″×2″ inline cartridge suits most reverse osmosis and under-sink systems. The connection type varies by model variant, though, so your unit’s fitting size should be confirmed in advance.
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Questions & Answers
Questions asked about this product
Questions on compatibility, capacity and installation are answered by our technical team. The answers stay public — so the next person with the same question can see them too.
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Installation and commissioning
Installation is a service · plumbing is the customer’s responsibilityThe system is delivered ready to install; it only needs to be connected to the inlet and outlet lines. If valve setup is required, we provide free support over a video call. Installation and commissioning fall under our service work and are subject to a service fee. Plumbing labour and any pipes, valves and fittings are not included in the price; these items are the customer’s responsibility.
Warranty
ConsumableThis product is classed as a consumable or spare part; because its life depends on use, it is not covered by warranty. Faulty or incorrectly shipped items are replaced — just get in touch with us.
Withdrawal and returns
Distance sales agreementThe right of withdrawal and the return terms are set out in detail in the distance sales agreement. Systems that have been installed and commissioned, and made-to-order products, are outside its scope.
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