Moby Hard Water Filter Cartridge

This is our water filter replacement cartridge for our Moby H.

Our hardness reduction water filter for your mains cold water tap, or even a small whole house supply. This water filter cartridge reduces scale but does NOT filter out chlorine, chloramines and other chemicals or organic compounds. Choose the Moby TH if you want to do this.

• One 10" x 4.5" carbon block filter cartridge (WCBFF975) with siliphos crystal inserts to reduce hardness.

Cartridge details:

• Watts WCBFF975 coconut shell carbon block filter cartridge for chlorine, taste, odour and sediment reduction with siliphos crystal inserts to reduce hardness.
• 5 micron / 4.5 x 10"
• Outperforms GAC cartridges as it has superior chlorine reduction (up to 99%), lower pressure drop, will not channel and costs less than a GAC cartridge.
• Media wrap between centre tube and carbon block to reduce carbon fines.
• 100% coconut shell carbon.
• FDA grade components and materials.
• Recommended flow rate - 4 gpm
• Maximum operating pressure: 125 PSIG
• Operating temperature: 10°C - 52°C / 50°F - 125°F
• Chlorine reduction - >10,000 Gal @ 2 gpm
• Tested and certified under NSF / ANSI standard 42 for materials only.

or on some occasions a Pure CTO 4510-05 cartridge may be sent. This does the same job as the Watts WCBFF975. They're just different brands.

• Pure CTO 4510-05 with siliphos crystal inserts to reduce hardness.
• 4.5 x 10
• 5 micron
• 12,000 gallons @ 2.0gpm or 12 months; whichever comes first
• Certified NSF/ANSI standard 42 for materials only
• Certified by ISO 9001
• Performance tested and verified by independent laboratory testing

We send out an email every 6 months to remind you to check your filter performance.

Why do I need to change the o-ring?

You can tell if the seals start leaking, which is obvious, I know.

Even if there are no leaks you may find that the profile of the O ring becomes flattened because of prolonged time under compression. The cross section should be round and if it's not it may not seal easily.

However, I recommend that you replace the O rings every two or three years as a precautionary measure.

One of the main reasons for changing O rings periodically is that as they age and compress, the housing bowl needs to be tightened excessively. That leads to difficulty loosening the bowl from the cap next time the cartridge needs to be replaced.