This is the annual pack is specifically for the Nimbus 4-Stage. This pack includes the membrane filter.
This is the replacement filters for the original Sierra system.
You can determine if you have the 4 stage by looking at your system and seeing if you have 1 blue capped filter, 1 green capped filter, and 1 white capped filter.
The recommended annual replacement filters for the Nimbus 4-Stage are:
Every 2-5 Years the membrane should be replaced (white capped filter); or when the TDS falls below 85% of the raw water.
- 1 Green Cap Filter
- 1 Blue Cap Filter
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