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Home > Water Filter Brands > Rainsoft Water Filters > 21173

Rainsoft 21173 Reverse Osmosis System Water Filters

Rainsoft 21173 Ultrafiner RO System and Rainsoft 21173 Reverse Osmosis Water Filters

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Product Code: 21173

Features
Replacements

Rainsoft Ultrefiner 21173 Reverse Osmosis System Replacement Water Filters:
We distribute compatible water filters for the Rainsoft 21173 Ultrefiner Reverse Osmosis System.
The Rainsoft 21173 RO System has three separate filtration stages.

Rainsoft 21173 Reverse Osmosis System Stages:
Stage 1: The P5 5 Micron Sediment Water Filter is used in the first housing. The Stage 1 filter should be changed every 2-6 months. Rainsoft Part # 13110 & 17367 Compatible.
Stage 2: The CTA-RS9-10 reverse osmosis membrane is the 2nd stage. The Stage 2 membrane should be changed every 1-3 years. Rainsoft Part # 12446 & 17376 Compatible.
Stage 3: The EPM-10 10 Micron Carbon Block water filter is the 3rd stage. The Stage 3 filter should be changed every 6-12 months. Rainsoft Part # 12464, 13119, 17368, 18557 Compatible.

Rainsoft 21173 Reverse Osmosis System Parts & Accessories:
Order the OR-38 replacement o-rings for the three slim line reverse osmosis housing sumps.

Rainsoft 21173 Water Filter Change Intervals:
The filter change interval will vary due to your water quality and the amount of water used.

We distribute compatible filters for the Rainsoft 21173 Reverse Osmosis System.

Stage 1: P5
Stage 2: CTA-RS9-10
Stage 3: EPM-10

See the Replacements tab above for more information on each stage and the compatible filters for each stage.

These filters can be purchased below.

Replacement Filters and Parts