What do u think about this unit compare to 139.99? Is it worth play 60 dollar? what the difference?
$ 199.00 - OCEAN REEF + 1 FIVE STAGE 75 GPD RO/DI
also what difference between this two units? the other company is 30 dollar cheaper since is free shipping.
http://www.bulkreefsupply.com/store/75-gpd-ro-di-5-stage-plus-system.html
Do you mean the $129 system? I cant find a $139 system at BRS.
If its the $129 system here are the features that the $199 system has over it.
-5 stage unit v 4 stage unit that includes the filter I describe below.
-It has a finer pre-fiter that is specifically for removing very fine sediments and chlorine before water hits the RO membrane or DI chamber.
-comes with an auto shut off valve
-has the dual TDS meter built in. This is a great feature and I constantly go back and forth about purchasing one to put on my system (~$30 to purchase from here, BRS) as it gives you instant readings on the water where you choose to set the probes at. You could set one before the filter to get a tap water TDS reading then put one on the product water line to see what the TDS is after complete filtration. You could also put one pre RO membrane and one after to see how effective your RO membrane is performing (since it actually removes ~90% of all water contaminants). The possibilities are endless but it would be a very valuable tool that would allow you to constantly measure your systems effectiveness and also let you know when you should replace filters.
- has a flush kit for the RO membrane. I have never used one but this could extend the useful life of your ro membrane (most expensive single filter) 3-4 times then without one.
- has a pressure gauge which you put inline. This is also a good tool to help decide when filters need to be changed as a pressure drop from whatever the pressure reads when first hooked up would denote clogged filters (normally just the pre filters, not the RO membrane or DI resin chamber).
Do you have any idea what the TDS ppm your tap water contains? If its below 400ppm the 4 stage system would be fine (it would be fine with higher ppm tap water but you may have to replace pre filters every 4 months instead of every 6-8 months, which is what I do).
You can increase the GPD of any unit but you just need to make sure that the membrane you have is rated for close to whatever the flow restriction module you put on it is.