Ontap Water Filter Systems
- Solid Block Carbon+Ceramic Filters
- Removes Cryptosporidium+Giardia
- Removes Chemicals (Chlorine etc)
- Self-Install, no plumber required
- Fast Insured Royal Mail Delivery
- Free Filter Reminder Service
- Friendly Helpdesk Support
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System 1 - Complete System
System 2 - Complete System
System 1 - Conversion Kit
System 2 - Conversion Kit
System 1 - Replacement Water Filters
System 2 - Replacement Water Filters
What do System 1 Filters remove?
What do System 2 Filters remove?
How long do Filters last?
Can I fit the system myself?
Can I convert my tap to Ontap Filters?
How do I convert a Brita® Triflow tap?
Free Filter Reminder Service
Free Helpdesk for your enquiries
Fast Insured Delivery
Organic Filters & Ecological Design
Carbon Water Purification (Chlorine etc)
Ceramic Water Filtration (Bacteria/Cysts)
Chlorine: What the Experts say
Chlorine: The Risks
Water: Treatment
Water: Bacteria & Cysts
Water: 11 Amazing Secrets
Water: The Facts
Site Map

Drinking Water Filter Systems for Home & Office
- Complete Undersink Water Purification Systems (incl.tap)
- Replacement Water Filter Cartridges for Ontap Systems
- Kits to convert your Water Filter System to Ontap Filters
- Kits to convert Triflow taps & Fridges to Ontap Filters
- Drinking Water Filter Taps, Spare Parts & Fittings
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 System 1 Replacement Carbon Block Water Filters

These advanced Carbon Block water filters have a nominal 3 micron rating and offer maximum absorption of Chlorine and other chemicals due to the large surface area (within the pores of the filter) that is approximately 14 times greater than normal loose fill GAC water filters and not subject to channeling which is a common cause of failure for regular GAC filters.
This under sink purification system removes Chlorine plus Herbicides, Pesticides and many other dangerous   chemicals and all particles over 3 microns in our water such as sand, silt, rust etc.
Enjoy crystal clear water straight from your tap with this excellent fresh water filter system - like bottled water but at a fraction of the cost.

System 1 Replacement Carbon Block Water Filters (Part No: OTS1R)
This is a Carbon Block Replacement Filter Cartridge for use with:
- Ontap System1 Drinking Water Filter Systems
- Ontap System1 Conversion Kits
Filters last for 6 months or 2600 litres (whichever comes first) Running cost approx 0.5p / litre

Read more about System 1 Drinking Water Filters
System 1 - Replacement Carbon Block Water Filter
Select Quantity:
Carbon Block Water Filter.
Chemicals (Chlorine, Bad Tastes, Odours etc).   See what System 1 Filters remove (click the BACK button to return to this spot)
£3.50 - Any Qty.

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Our Water Filter Systems have a 1 year guarantee on all parts excluding filters.
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