





💧 Pure Power, Made in the USA — Don’t Let Your Water System Fall Behind!
The APPLIED MEMBRANE INC 4x40 Reverse Osmosis Membrane is a premium commercial-grade filtration element designed for high flow (3,000 GPD) and exceptional salt rejection (99.5%). Manufactured in the USA under ISO 9001:2015 standards, this thin film composite membrane fits standard housings and delivers reliable, long-lasting purification for tap or brackish water systems, making it the go-to replacement for small commercial RO setups.
| Best Sellers Rank | #415,065 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #2,659 in Replacement Under-Sink Water Filters |
| Brand | APPLIED MEMBRANES INC. |
| Customer Reviews | 3.9 out of 5 stars 22 Reviews |
| External Testing Certification | ISO |
| Material | Thin Film Composite Membrane |
| Product Benefits | Produces 3,000 gallons per day of purified water at 99.5% salt rejection (stabilized) |
| Product Dimensions | 4"D x 4"W x 40"H |
| Set Name | 4x40 |
C**E
Works as good as the originals so far
They fit perfect and so far are doing a great job. Brought our output ppm from 500+ to basically immeasurable again. We have had it in for several months now and still doing well
K**Y
Good quality
On time
F**D
Does not reject 99% Poor quality filter
This filter is pretty low quality if you are looking for an RO filter than actually takes out most of the TDS. Even with a pump, this does a poor job. If you are using DI after the filter, expect this to cost you a lot more in DI costs. I usually use Axeon HF5 filters and get rid of them when the TDS hits 30+ after a long period of use. These filters will not filter water that low brand new. The 99% rejection claim is a gross mis-statement. I would steer clear of this filter if the rejection rate is important to your usage. This was a huge waste of money for me. Straight to the dumpster.
G**S
Súper importante es lo mejor
Esto me sirvió en mi negocio
R**H
great little ro filter
these work well for our ro water system for our cnc machines
E**O
Work about a month and gets clogged
I'm professional water filtration system company owner never got so bad membrane so poor quality
L**Z
Mala calidad
Las membranas fueron sometidas a 60 psi, presión por debajo del rango de trabajo y no funcionaron, dejan pasar muchos disueltos
J**S
No funciona al 100%
No cumple con lo publicitado.
Trustpilot
1 month ago
2 months ago