You definitely need at least a di tank. A carbon prefilter should be helpful to preserve the resin a bit longer as well. 72 in generally in the range where you could get by w/o reverse osmosis. If you go with just di, I’d suggest you consider getting a 3/4 or 1 cu. ft. tank. It will not just last longer, but the regen. cost is more economical as well.
Also make sure to spot check different areas. The TDS at your home may be 72, but a mile down the road it may be 400. It all varies on different water systems.
Should the decision of whether or not to buy or rent a DI tank also factor in how much water you would anticipate using?
According to the WCR charts for a 1 cubic ft tank at 75ppm you should get about 4000gals of water. Assuming you rent the same size tank you would get the same amount of water. If you have to pay a monthly fee on top of the cost to recharge the filter, you may want to figure out how long it would take you to use 4000gal.
If you figure it may take you several months or more, then you will pay three months of rental fees along with the cost of the recharge. Or you could buy a DI tank and pay no rental fees at all but instead only pay for new resin when you use it all up.
So I would think about how much water you might need and then call around and see if the tank rental places charge a monthly fee (mine doesn’t, they only charge to replace the tank).
Ok that’s my two pennys. But I don’t have any experience with WFPs yet, so this is all just theoretical conjecture on my part.
@Warrens Window Cleaning… I bought a tank and pole from WCR a few weeks ago… they absolutely know what they’re talking about, took good care of me, and are on top of their game. Better to go with the pros that know their way around window cleaning than with the local guys that know drinking water.
Hey Chris, did that WCR DI tank come with resin when you bought it, or did you have to buy the tank and some resin the first time? I’m still debating renting the 1.5 cubic ft tank or just buying a smaller one for the portability.
I do believe all WCR tanks come with virgin resin. Although I have a .75 cubic foot tank I’m kinda wishing I went with the .5 cubic foot… the thing is HEAVY when its full. I’m a pretty strong guy, but I don’t think I’d be able to get a loaded 1.5 into my truck alone, honestly.
Yeah that’s kind of my thinking as well. I’m sure I could manage it, but my back would probably give out halfway through the work day. I’m really thinking that I would prefer ease of use over less regen times.