Tony Romano
Member
Actually it seems to me you got a good deal, there is a ton of room in retail prices. I have LFS who will sell me anything special order for 10% over his cost. At first I was shocked at real cost....
ro/di--info sources?
- Thread starter jankyjameson
- Start date
AZDesertRat
In Memoriam
Test your RO only TDS, that number is how to tell quality. Any DI filter should be capable of 0 TDS.
The other indication of quality is the prefilters and carbon. Some vendors use cheap granular carbon which is exhausted in as little as 300 total gallons (thats 60 good RO/DI gallons and 240 gallons of waste) and others use cheap non sized carbon blocks which fail at less than 1000 total gallons. Good vendors use carbon blocks good for up to 20,000 gallons of normally chlorinated water.
Prefilters are another problem area, some are about as effective as a screen door. You want a prefilter that is capable of protecting the carbon block and membrane or you shorten the life of both of those more expensive components.
Its the whole package that makes a good RO/DI, prefilter, carbon block, membrane and DI. Scrimp on any piece and it affects the entire system.
The other indication of quality is the prefilters and carbon. Some vendors use cheap granular carbon which is exhausted in as little as 300 total gallons (thats 60 good RO/DI gallons and 240 gallons of waste) and others use cheap non sized carbon blocks which fail at less than 1000 total gallons. Good vendors use carbon blocks good for up to 20,000 gallons of normally chlorinated water.
Prefilters are another problem area, some are about as effective as a screen door. You want a prefilter that is capable of protecting the carbon block and membrane or you shorten the life of both of those more expensive components.
Its the whole package that makes a good RO/DI, prefilter, carbon block, membrane and DI. Scrimp on any piece and it affects the entire system.
abulgin
Premium Member
Here's another option that I found when I was researching that Bob Fenner indicated looked decent (although he admitted he's never used it).
http://www.melevsreef.com/ro_di.html
http://www.melevsreef.com/ro_di.html
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