Replacement Oyster TMF Cartridge Set

Cartridge details

• 1 x GAC10N/KDF-BOM cartridge which contains 0.75lbs of KDF and 0.75 litres of GAC.
• 2.5 x 10".
• Fits standard 10" housing.
• 20 micron.
• 2,500 gallons/11,365 litres cartridge lifespan, or 12 months; whichever comes first.

And

• 1 x activated alumina fluoride removal filter cartridge
• 10 micron
• Temperature range 40°F (4°C) to 100°F (38°C)
• Pressure range 25 psi (1.7 bar) to 100 psi (6.9 bar)
• Capacity 5,000 mg/l
• Flow rate - 0.38 lpm / 0.25 gpm
• Reduction ability - 10ppm to <0.2ppm

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.