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View Full Version : Need some help selecting a SpectraPure RO/DI unit!


mbemount
08/30/2014, 01:46 AM
Looking at getting one of the 90 Gallon MaxCap systems but wasn't 100% sure which one yet. Dumb question but is the only difference between the 'MaxCap Standard' and the 'MaxCap 2:1 Manual Flush', the Flush Kit? What are the main benefits I'm going to see from having the flush kit? Extended membrane life?

Also I figure the sediment filter will be the one I replaced the most frequent? Whats the average life on those? I'm sure it depends on alot of things but I'm just trying to gauge the costs of maintaining the unit over the course of the year. Thanks!

azjohnny
08/30/2014, 04:27 AM
A flush kit helps more with harder water especially calcium. calcium is a "soft" mineral that like to bind and will clog up the membrane if not flushed, If you have a water softener the calcium ions are replaced by sodium which doesn't have the same issues as calcium. I would find it the hardness of your feed water, if it is soft a flush kit wouldn't be an issue.

With my Maxcap I change out the sediment and carbon filter every 12 months, some do it more often and I use the highest quality replacement filters Spectrapure sells

SpectraPure
09/12/2014, 03:12 PM
Looking at getting one of the 90 Gallon MaxCap systems but wasn't 100% sure which one yet. Dumb question but is the only difference between the 'MaxCap Standard' and the 'MaxCap 2:1 Manual Flush', the Flush Kit?

No such thing as a DQ.
The standard has smaller DI filters, and the "-MF" refers to manual flush kit, which comes with membrane flush assembly to extend the life of your membrane, and also comes included (not extra) with an ASO, float valve, larger "HC" longer life DI stages, and shut off valve.

What are the main benefits I'm going to see from having the flush kit? Extended membrane life?
Yes.

Also I figure the sediment filter will be the one I replaced the most frequent?
Depending on how much water you are making, how frequent you make the water, and the condition of that water, you will probably be changing your DI before your two pre filters (sediment and carbon).
An average may be pre filters every six months, DI as needed.

What's the average life on those?

http://spectrapure.com/frequently-asked-questions#carbonchange

and also
http://www.reefcentral.com/forums/showthread.php?t=2342795

http://www.reefcentral.com/forums/showthread.php?t=2124340

http://www.reefcentral.com/forums/showthread.php?t=929156

and
http://www.reefcentral.com/forums/showthread.php?t=1735396

There are others, but these will answer a few of your questions.


Lastly, the cost of RODI water pales in comparison to the cost of bad water, as you have a sizable investment in your aquatic environment.
bruce




I'm sure it depends on alot of things but I'm just trying to gauge the costs of maintaining the unit over the course of the year. Thanks!