Quote:
	
	
		
			
				
					Originally Posted by  globaldesigns
					 
				 
				That is a neat little unit, it doesn't say the GPD (Gallons per day) or how to replace the internals (or can you?) 
 
Is this a disposable unit? Very neat. 
			
		 | 
	
	
 You can replace the DI cartridge which is about 85% of the price anyway.  It is essentially a DI filter and it works great on our low TDS Vancouver water.  It is perfect for the smaller tank around the Lower Mainland.  I used one for years on my 46 gallon.  You'll need a bit of patience for anything larger.
Be aware, however, that unlike a full out RO/DI unit this thing cannot deal with turbidity and particulate matter very well.  I often found that its output slowed even before the DI beads were exhausted because its small foam filter pad was clogged.  And unlike a modular RO/DI unit everything is in one single cartridge that you have to replace in one shot.  
I was also wary of the city injecting extra chlorine into the water after a heavy storm since it can ruin DI beads.  On a full RO/DI unit you've got multiple layers of protection to deal with extra chlorine before it gets to the DI.  On this unit all you've got is a thin layer of carbon, I think.  
I know that OA used only DI filtration for quite a while when they started up, so this is a good way to go until you upgrade to a bigger tank.