C-Max MAXCL-FF975 Water Filter Cartridge

C Max carbon block water filter cartridge for longer life and high chlorine reduction.

The best choice when a “super chlorine guzzler” is needed!"

Here's some details on the Watts MAXCL-FF975...

• Solid block activated carbon for long life
• Reduction of certain VOC's
• Thick wall for greater chlorine, taste and odour reduction
• Highly effective chlorine, taste and odour reduction at 25,000 litres at 11.2 litres per minute flow rate. It will also be effective at higher flow rates e.g. 17,500 gallons at 15 litres per minute.
• Reduces fine sediment and rust particles
• 1 micron nominal filtration
• Temperature range 40-165°F (4.4-73.8°C)
• Fits standard full flow & BB filter housings 4.5 x 10"

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.