RODI Pressure

[rmillay1974]

If i have 82 lbs coming in do i need to run a booster?

 

[JoshH]

What system do you have? Although you could run pretty much any system with 82 PSI.

 

[rmillay1974]

marine depot 6 stage

 

[JoshH]

82 PSI is plenty for that IMO

 

[K. Steven]

Is it 82 psi going into the prefilters or into the membrane? There can be a drop in pressure between the prefilters and the membrane. 82 psi into the membrane is more than sufficient.

 

[rmillay1974]

going to add a gauge before membrane soon.

 

[K. Steven]

going to add a gauge before membrane soon.

Just move the gauge you have now. A pressure gauge before the prefilters is not really necessary because all you care about is the pressure going into the membrane.

 

[KSReefing]

I believe they recommend you have a pressure of 50 PSI. You have more than enough pressure. No booster pump needed.

 

[KSReefing]

So no booster pump needed!

 

[rmillay1974]

Thanks Guys will move gauge

 

[Gene Ashton]

I am considering a 5 stage RODI unit from BRS. Is your system working as it should with 82psi?

 

[JoshH]

I am considering a 5 stage RODI unit from BRS. Is your system working as it should with 82psi?

Mines a 4 stage with dual RO membranes running with 85 PSI with no issues whatsoever :)

 

[rmillay1974]

I am considering a 5 stage RODI unit from BRS. Is your system working as it should with 82psi?

working fine

 

[levi83]

My pressure dropped over time. Will prefilters affect pressure into the membrane?

 

[chipmunkofdoom2]

My pressure dropped over time. Will prefilters affect pressure into the membrane?

Yes. As prefilters catch the particulate matter in the source water, they clog. This is normal and to be expected. This is part of the reason why you should change your prefilters every 6 months on a schedule, or when you observe a pressure drop. The other reason is because carbon loses its ability to handle chlorine/chloriamine over time. Both chlorine and chloramine will ruin a RO membrane pretty quickly.

 

[levi83]

Thanks for the info. My pressure dropped in about two months but I was doing a lot of waterchanges on my 210. Good to know. I never had a pressure gauge so I never really knew what to look for.

 

[chipmunkofdoom2]

Thanks for the info. My pressure dropped in about two months but I was doing a lot of waterchanges on my 210. Good to know. I never had a pressure gauge so I never really knew what to look for.

It could be that you just have a lot of particulate matter in your water. Try using a small sediment filter (1 micron) and replacing just the sediment filter when the pressure drops. If your sediment filter is protecting your carbon blocks adequately, it's possible they can be changed out much less frequently.