Doby M Replacement Cartridge

This is our replacement water filter cartridge for our Doby M.

Our heavy metals and chlorine reduction water filter for your mains cold water tap, or even a small whole house supply.

Cartridge details:

• Contains GAC/KDF filter medium (GAC10N/KDF-BOM)
• 4.5" x 20"
• 5 micron
• 24,000 gallons @ 2.0gpm or 12 months; whichever comes first
• Certified NSF/ANSI standard 42 NSF
• 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.