$272 $340

Amazon has the iSpring PH100 pH+ 6-Stage Under Sink Reverse Osmosis RO Drinking Water Filtration System for $272 with free shipping. Home Depot has it for the same price.

Has 100 GPD fast flow with 1:1 pure to waste ratio with Alkaline remineralization. 

$272 retail: $340
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Comments & Reviews (2)

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Rx7145
Ben's cred: 64
Posted 11/30/2021 at 11:03 AM PT
Posted 11/30/2021 at 11:03 AM PT
That one to one ratio is almost hard to believe.
limit_voodoo
Ben's cred: 12
Posted 11/30/2021 at 02:04 PM PT
Posted 11/30/2021 at 02:04 PM PT
The 1 to 1 could work, so long as your source water TDS is 200 ppm/.4 EC or less. It could be higher but at 1 to 1 the RO membrane is going to take a beating and will have a reduced amount of usability. Also, 100 gallons per day isn't really fast but adequate..