Find Replacements
Tell Us What System You Have
System Type
RO System
UV System
Brand
Model
Search
Reverse Osmosis Systems
Rainsoft Ultrefiner II 3-Stage RO Conversion Kit Filters

Rainsoft Ultrefiner II 3-Stage RO Conversion Kit Filters

Rainsoft Ultrefiner II 3-Stage RO Conversion Kit Filters

The Rainsoft Ultrefiner II reverse osmosis drinking water system uses expensive proprietary filters that offer few benefits over traditional RO systems, and the filters can only be purchased directly from a Rainsoft authorized dealer. 


Alternative Option to Rainsoft Ultrefiner II Filters: To reduce costs, save water, and produce purified water faster, consider converting your Rainsoft system to the PuROTwist Retrofit Kit (PT4000T75-RK). This conversion kit allows you to use PuROTwist filters with your existing Rainsoft faucet, tank, and tubing. Start saving on replacement filters today!


IMPORTANT: The PuROTwist filter kits below only work if you convert your Rainsoft system with the PuROTwist Retrofit Kit (PT4000T75-RK).

PuROTwist RO Conversion Kit w/ Manifold and Filters Only PuROTwist 3-Stage 50 GPD TFC RO System PT3000T50-SS-RK PT3000T50-SS-RK
PuROTwist
RO System Conversion Kit with Filters 50 GPD PT3000T50-SS-RK
(31)
$329.00$389.00
Clean and simple filter replacements with quick twist connection
System made in the USA
1-Year Filter Replacement Kit for PuROTwist 3000 with 50 GPD TFC Reverse Osmosis Membrane YSM-PURO3T50
ESP Water
PuROTwist 3000 RO Filter Replacement Kit with 50 GPD Membrane
(13)
$127.01
PuROTwist 3000 Reverse Osmosis System Replacement Filter Change Bundle RO Membrane Sold Separately YS-PURO3T50
ESP Water
PuROTwist 3000 RO Replacement Filter Kit - No Membrane
(5)
$43.98
Omnipure Omnipure Q-Series 2.5 x 12 GAC T33 Carbon Filter Q5633 Q5633
Omnipure
Omnipure Q5633 Granular Carbon Filter GAC T33 2.5" x 12"
(31)
$22.99$30.65
NSF 42 Certified
Reduces chlorine, taste and odor
Omnipure Omnipure PuROTwist 50 GPD Q-Series TFC RO membrane with Flow Control TQ56-50FC Q5672-50FC
Omnipure
Omnipure Q5672-50FC RO membrane 50 GPD with Flow Control
(24)
$77.99$104.99
Thin Film Membrane (TFM)
Omnipure Omnipure Q5621 Q-Series Carbon Block Filter Replacement 10-Micron 2.5 x 12 Q5621
Omnipure
Omnipure Q5621 Carbon Block Filter 10 Micron 2.5 " x 12"
(18)
$20.99$26.65
Reduces chlorine, taste and odor
NSF 42 Certified
PAE PAE 4.4 Gallon Reverse Osmosis Water Storage Pressure Tank - White 1/4 Male Threads 2.8 Gal Capacity TKE-3200W
PAE
RO-132 RO Water Storage Pressure Tank 4.4 Gallon
(68)
$59.99$61.30
NSF Certified

Focused on What Matters

Team of Trained and
Experienced Specialists
Live US-Based
Support Team
Top Rated
Service
Free Fast Shipping
On Orders $99+
{"statementLink":"","footerHtml":"","hideMobile":true,"hideTrigger":true,"disableBgProcess":false,"language":"en","position":"left","leadColor":"#146ff8","triggerColor":"#146ff8","triggerRadius":"50%","triggerPositionX":"right","triggerPositionY":"bottom","triggerIcon":"people","triggerSize":"medium","triggerOffsetX":20,"triggerOffsetY":20,"mobile":{"triggerSize":"small","triggerPositionX":"right","triggerPositionY":"bottom","triggerOffsetX":10,"triggerOffsetY":10,"triggerRadius":"50%"}}