LFS says Ok to fill new tank without RO

[Robf]

here is a link to a 60gpd flow restrictor. A picture is worth a thousand words. Ten-thousand if I'm describing it

http://www.coralreefsupply.com/detail.p ... m=KM_FR_60

 

[Anonymous]

I usually start out with tap water. I figure all the crap from the new live rock is going to muck up the water plenty, and into the cycle somewhere I change all the water anyway. Has worked out fine for me. My water comes from my well, if that matters.

 

[Osama]

Thanks Rob & All.
Nothing has helped yet. Three observations:
The second canister remains totally free of any iron residue which usually accumulates there.
Water flow flow the two membrane cartridges into the DI is slow
The LFS sold me two cartridges good for 75GPD each (150gpd total) wherby my original units were good with two cartridges for a total of 100gpd.
From Rob's statement it seems that I should try: either change the restrictors or buy new cartridges 50gpd each.
I tend to go for the dial in restrictors Do I call Kent for those or are there any local supplier in Chicago area ?? My system is from Kent..

 

[Robf]

Osama:

I'm guessing that 75gpd membranes would need more pressure than a 50gpd membrane in order to force more product water through the membrane...

I'd have to say that you need 2 new flow restrictors. The good news is that they typically cost <$4 each.

Do you have a competant LFS in the area?

Otherwise, I have tracked one down for $3... http://www.marinedepot.com/md_viewItem. ... uct=RO1215

It is interchangeable with the Kent Marine units. There is a toll-free number on the page that you may wish to call if you have any questions as to whether or not this will help. I patronize Marine Depot all the time, and I have had nothing but a great experince every time.

I know we got a little off-topic, but I'd really like to see you get your RO unit working. Best of luck!

-Rob

 

[Osama]

Thanks Rob. I also use Marine depot and have been satisfied with their service . Thanks

 

[Robf]

Anytime!

-R.

 

[Anonymous]

When I replaced the 24 gpd membrane in my Kent Maxxim RO/DI systems, I removed the original flow restrictor and replaced it with an adjustable one. I check and adjust the restrictor at least once per month to make sure that I have a waste to product flow ratio of about 3.5 to 1. At this ratio, my RO membrane will take the tap water from ~160 ppm down to ~5-7 ppm.

Your existing restrictor, particularly if you did not change it when you change the type of membrane in your system, could very likely be the problem behind your poor output levels.

I would also check for other water pressure or flow problems:

1) Dirty pre-filter cartridges can reduce flow rates to the point of decreasing pressure.

2) Water pressure problems can also be a problem. Is there anything restricting the flow into your RO system? Your plumbing could have hard water deposits that are causing a problem. A booster pump will also help.

You can check pressure/flow problems by measuring the flow rate of water produced by the membrane, and then comparing this with the stated flow capacity. Most users get about 1/2 of the stated values because the input water is usually cold.