This filter is suitable for Coldstream systems installed on or under the countertop and is also compatible with your existing water filtration system. Capacity: 3000 liters, or 6 months. Cost price: 1 cent per liter.
The Coldstream CTO+ water purifier offers ultimate protection against water pollutants, nitrates, fluoride, PFAS, and provides delicious water – it is made up of 2 key elements.
- For good and safe drinking water
- Essential salts and electrolytes that contribute to good health remain in the filtered water.
- Maximum chemical protection, most effective against polluting products.
- No power supply required
- The inner carbon core protects against chemical contamination, including pesticides and herbicides.
- This outer ceramic layer is surrounded by maximum antibacterial protection and eliminates particles and microplastics.
The Coldstream CTO+ filter outperforms all Berkefeld gravity filters. It is manufactured in the United Kingdom by KLT Filtration Ltd.
TESTS AND VERIFICATION
Coldstream has been successfully tested according to the following standards and methods:
- NSF/ANSI 42 Aesthetic Effects
- NSF/ANSI 53 Health Effects
- NSF P231 Microbiological Purifier
- USA EPA Method 200.8 Determination of Metals and Trace Elements in Water and Waste
- U.S. EPA Method 505-2.1 Analysis of Organic Pesticides and Commercial Polychlorinated Biphenyl (PCB) Products in Water
- USA EPA Method 508.1-2 Chlorinated Pesticides, Herbicides, and Organohalides in Water by GCECD
- USA EPA Method 515-2 Chlorinated Acids
- USA EPA 524-2 Method for Measuring Purgeable Organic Compounds in Water
- USA EPA 525-2 Method: Organic Compounds in Drinking Water
- USA EPA Method MS301(a) A colorimetric test based on an indicator strip for nitrates (NO3) in water and soil.
The tests are performed according to NSF/ANSI standards 42, 53 and P231 by Envirotek Inc, New Jersey USA, EPA ID # NJ01298 NJ.
Their laboratory complies with all laboratory certification and quality control procedures and requirements set forth in NJAC 7:18; NYCRR Subpart 55-2; National Environmental Laboratory Accreditation Conference (NELAC) standards; and ISO 17025.
The filters were tested using a Coldstream system according to NSF/ANSI standards 42, 53 and P231 for the reduction of listed substances.
The reduction in the concentration of substances in the water was reduced to a value less than or equal to the limit for water leaving the system, as specified in NSF/ANSI standards 42, 53 and P231.
To ensure that our Coldstream products meet consistently high standards, Coldstream has implemented a series of strict quality control procedures.
The finished filters are regularly tested to determine pore size, flow rate, bubble point and compression strength, confirming that each batch will work perfectly.
In addition to this, the effluent water they produce is subjected to sensory evaluation and chemical testing to ensure that all contaminants have been removed.

Particles Elimination at 99.9% of class 1 particle reduction, including microplastics.
Bacteria 99.9999% elimination of bacteria and cysts* such as E. coli, Shigella, Cryptosporidium and Giardia.
Chemical products 99.9% removal of volatile organic chemicals*, nitrates, nitrites, chlorine and chloramine.
Heavy metals 99.9% for the removal of heavy metals, including lead and mercury. For arsenic removal*, see the performance data sheet.
Pesticides and herbicides 99.9% elimination of pesticides and herbicides, including DDT.
Medications 99.9% pharmaceutical product disposal.
Fluoride: 99.9% elimination