90 GPD RO Membrane: Is It Right For Your Home Water Filter?

Okay, so the other day, I got this new RO membrane, a 90 GPD one. I needed to change out the old one in my reverse osmosis system because, you know, it wasn’t working so well anymore. Let me tell you, it was a bit of a process, but I got through it.

Getting Started

First off, I turned off the water supply to the system. No one wants a surprise shower, right? Then, I grabbed the housing wrench that came with my system. This thing is a lifesaver. I used it to loosen the housing that holds the membrane. It’s usually a bit tight, but with some elbow grease, it came off.

Taking Out the Old Membrane

Once the housing was off, I saw the old membrane sitting in there. It looked pretty worn out, so I was glad I decided to replace it. I used some pliers to pull it out. It’s a bit slippery, so you gotta get a good grip. I pulled it out and set it aside to throw away later.

Putting in the New Membrane

Now, for the new membrane. I took the 90 GPD membrane out of its packaging. I made sure to handle it carefully. I put some silicone grease on the O-rings, it came with it, that’s important to keep things sealed tight. Then, I slid the new membrane into the housing, making sure it went in the right way. There’s usually an arrow or some marking to show you which end goes in first.

Putting It All Back Together

After the new membrane was in place, I put the housing back on the system. I tightened it with the housing wrench, but not too tight, just enough to make sure it wouldn’t leak. Then, I turned the water supply back on and checked for any leaks. Everything looked good, no drips or anything.

Flushing the System

Now, you can’t just start using the water right away. I ran the system for about 24 hours to flush out any manufacturing residues or anything like that. I think the new membrane is supposed to handle 90 gallons per day, but that’s under ideal conditions. I read online that the GPD number is just a rating for how much water it can produce in 24 hours if it’s running non-stop.

Observations

From what I understand, a higher GPD doesn’t necessarily mean better water quality. It just means it can produce more water in a day. I also read that these higher GPD membranes can be more expensive, but I went with a 90 GPD one because that’s what my system originally had. I chose this 90 GPD membrane is that it was from DuPont. I heard they’re pretty good with water stuff, and this one supposedly has a 99% rejection ratio, which sounds impressive.

Final Thoughts

So yeah, that’s how I changed out my RO membrane. It wasn’t too hard, just took a bit of time and some basic tools. I learned that the size of the membrane and the housing is pretty standard for homes. Like, 12-inch housing and 1.5-1.8 inches in diameter for the membrane. I’m no expert, but it seems like as long as you get the right size and GPD for your system, you’re good to go. Oh, and I guess the 100 GPD ones let more water through, but I don’t need that much water. After a day of flushing, the water tasted great, and the system was working like new. Pretty satisfying, I gotta say!