Rudy
Active member
The system pressure on my RO fell to the point where I could only maintain 140 psi. The quality of the water was still so-so....about 6 ppm...so I let it go for a while. Yesterday, I changed the membranes. The system pressure now will not go above 100psi, and the quality of the water is 3 ppm. Usually, when I put new membranes in, the quality goes to 0 or 1 ppm.
I CAN get the system pressure to hit 200psi, but only if I set the reject rate very low....which is not good for the membranes.
I'm wondering if there's an internal leak ???? When I replace the membranes, there are two "extenders" which fit on the ends of the membranes to connect the centers into the end plugs. There are O-rings involved. If these were to leak....wouldn't that cause a drop off in pressure, and also contaminate the output water?
It's my understanding that these "extenders" were used on pressure vessels a long time (15 years) ago, and that now.....modern pressure vessels seat the end plug directly onto the end of the membrane.
Am I on the right track here, or is there some other reason my system can't run enough pressure, while, at the same time there appears to be some contamination with brand new membranes??
I CAN get the system pressure to hit 200psi, but only if I set the reject rate very low....which is not good for the membranes.
I'm wondering if there's an internal leak ???? When I replace the membranes, there are two "extenders" which fit on the ends of the membranes to connect the centers into the end plugs. There are O-rings involved. If these were to leak....wouldn't that cause a drop off in pressure, and also contaminate the output water?
It's my understanding that these "extenders" were used on pressure vessels a long time (15 years) ago, and that now.....modern pressure vessels seat the end plug directly onto the end of the membrane.
Am I on the right track here, or is there some other reason my system can't run enough pressure, while, at the same time there appears to be some contamination with brand new membranes??