RO Filter replace
"Filters are replaced and working fine thanks"
RainSoft 21179 Compatible RO Filter Kit - Membrane Sold Separately
Q&As
RainSoft 21179 Compatible RO Filter Kit - Membrane Sold Separately
Q&As
Part Number:
YS-RS21179
RO filter replacement kit for RainSoft 21179, reverse osmosis membrane not included
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IN STOCK
Description
1-Year Filter Replacement Kit for RainSoft 21179 Reverse Osmosis System (RO Membrane Sold Separately)
INCLUDES:
- STAGE 1 - 1x Carbon Block Pre Filter (OMB934-5M) - Replace Every 12 Months
- STAGE 2 - 0x (RO Membrane TFC-RS9-50 Sold Separately or Included with Replacement Kit YSM-RS21179) - Replace Every 24 Months
- STAGE 3 - 1x Carbon Block Post Filter (OMB934-1M) - Replace Every 12 Months
Note these filters are high-quality replacement filters for the Rainsoft 21179 RO system and not genuine Rainsoft parts.
Note: If your Rainsoft reverse osmosis system is from 2013 or newer, it most likely is the Ultrefiner II. The Ultrefiner II requires proprietary filters that must be purchased from a Rainsoft dealer. Conversion kits to generic non-OEM replacement filters are available.
We offer two replacement filter kits so you can get exactly what you need — and avoid paying for filters you don’t.
-
Year 1 Kit (Includes RO Membrane):
Ideal for your first full replacement, this kit includes all filters plus the RO membrane, which typically lasts up to 24 months. -
Year 2 Kit found on this page (Without RO Membrane):
After the first year, you only need to replace the pre- and post-filters, since the RO membrane is still good for another year. This kit helps you save money while keeping your system performing like new.
*Filters may need to be replaced more often than indicated, depending on incoming water contaminant levels and volume of water being treated
This Item Fits These Select Systems
Replacements & Add Ons
Replacements for This Item
View All System Parts
Stage 1
Omnipure OMB934-5m Carbon Block Filter 5 Micron 2.5" x 10"
Replace Every 12 Months
See Details
Stage 3
Omnipure OMB934-1m Carbon Block Filter 1 Micron 2.5" x 10"
Replace Every 12 Months
See Details
Add Ons for This Item
Overall rating: 5.0 / 5 from 7 reviews.
AI Generated Review Summary
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Review highlights
Reviews
RO Filter replace
"Filters are replaced and working fine thanks"
Great price!
"Great price!"
Great
"Great"
Two carbon filters
"Great product, but comes with no instructions, or guidelines. My rainsoft technician puts the blue filter in the stage 1 filter position, and swears that is the way they are supposed to go. I have no way to argue with the tech when your filters come with no instalation instructions."
Like the filters for my RainSoft reverse osmosis
"Great product no complaints"
Best Product and Price around
"Best Product and Price around"
Best out there
"Fast Shipping Very Good Product"
Q&A
Q:
What is included in the RainSoft 21179 compatible kit?
A:
OMB934-5M carbon prefilter and OMB934-1M carbon post-filter.
Q:
Which RO system does this kit fit?
A:
The catalog lists: 21179. Confirm the exact model or part number on your equipment before ordering RainSoft 21179 compatible kit.
Q:
Does this kit include the RO membrane?
A:
No. The TFC-RS9-50 membrane is sold separately; choose YSM-RS21179 when the membrane is also due. These are compatible replacements, not RainSoft-manufactured parts.
Q:
How often should the filters be replaced?
A:
Prefilters and post-filters are commonly changed every 6 to 12 months. RO membranes commonly last about 24 months, although water quality and use can shorten either interval.
Q:
What should I verify before ordering?
A:
Match the system model, individual filter part numbers, membrane capacity, and connection style. Stage count alone does not establish compatibility.
Q:
What should I do after replacing the filters?
A:
Restore water slowly, inspect all housings and tubing for leaks, and flush according to the system instructions before using product water.
