Membrane Solutions Reverse Osmosis Membrane 50 GPD 11.75"x1.75" RO Membrane Water Filter Replacement Fits Under Sink RO Drinking Water Purifier System 1-Pack

But I'm already back up to 137ppm after only a month. My water is filtered through a softener, sediment, and carbon filter. Before entering this RO filter, the water is filtered to a size of 5 microns. I'm not sure what I'm missing here. The majority of people believe that RO filters should last a year or two. I use well water, but every couple of months I flush the sediment out of the pressure tank, and everything is fine. br>NOTE: THIS PAGE HAS BEEN UPDATED. br>This update is primarily about the seller's response to my issues; it's difficult to say whether it was a faulty filter or if the design was simply not appropriate for the housing I have, but I must say that the seller has been extremely accommodating to my needs. He's stayed in touch and offered a variety of solutions.

Ryleigh Patel

| Nov 08, 2021

On a tankless RO system with a 75 psi booster pump (measured by an inline gauge right in front of the membranes), I'm running two of these membranes in series (wastewater staging configuration). br>br>I have two permanent inline TDS meters installed, one before and one after the membranes. The input was approximately 250 TDS, while the output was approximately 9 TDS. That seems to be 96% to 97% consistent rejection rate. Particularly when meter error margin is taken into account, this rate is very close to the advertised rate. You can expect slightly better performance if you use a single membrane system. br>br> Running membranes in series, as I am, increases output flow and reduces waste water, but it slightly increases final TDS output because concentrated wastewater from the first membrane is fed into the second. br>br>I don't have anything to measure flow rates with, but based on appearances, these membranes appear to be slightly faster than my previous membranes, which were 200GPD membranes, whereas these are 300GPD membranes. They do not feel 33% faster, but that might change as the filters break in more completely. For the time being, they'll suffice in the kitchen sink. br>br>I usually use iSpring membranes, which I found to produce nearly identical results. I reached out to iSpring to inquire about the differences between their membranes and this one, but they refused to respond. These membranes cost more than twice as much as iSpring membranes. I had the impression that I was a nobody. I decided enough was enough and took a chance on this brand, which has proven to be successful thus far. br>br>I'll update this review if anything goes wrong with long-term use. I'm pretty sure that most membranes are manufactured by Dow Chemical and then white-labeled for resale by other companies, so similar performance is likely.

Alexander BUTCHER

| Dec 20, 2020

It isn't their fault that I am incapable of plumbing plastic tubing.

Myra Fischer

| Mar 05, 2021

It's a good RO membrane that does what it's supposed to do. You'd think they'd all work equally well, but this is one of the best I've had in recent years. Even with hard well water on the input, it feels a little slower than 50 gpd, but it's fast enough for what I need and keeps the TDS consistent.

Frances Bennet

| Mar 23, 2021

My TDS went from the 340s to the 20s to the low 30s. This was never the case with my previous Watts membrane. Despite my current system having four filters compared to iSpring's five, I think it's better than the iSpring brand/system. I'm hoping for long-term results.

Leighton Randolph

| Nov 15, 2021

Although the unit appears to be operating normally, floe continues to be slow. I'm going to buy new filters to go with the RO cartridge to see if that solves the problem.

Andi Jennings

| Mar 15, 2021

Every six months or so, it should be replaced.

Gustavo Andersen

| Mar 12, 2021

It was purchased to replace the membranes in a hydrologic R/O 200 system that had failed. It was comfortable to wear and lasted for quite some time.

Anya HUSSAIN

| Mar 27, 2021