Ebay RO/DI Units...

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Sadly, the three stooges can't read. :rolleyes: That was a joke and not a personal attack either, so laugh and continue reading (preferably the entire piece of what I said, not picking and choosing random quotes out of context).

Yet you have not explained what the problem is or why the math is wrong....

I did, you just conveniently passed over it.

You do NOT pay $200 to just get a better membrane. That is a misleading comment and why these threads are as long as they are. DO we really have to rehash this whole thing again? Filter quality?, Component quality?, Resin configuration, Resin Quality, Customer service?, etc. You are free to buy what you want, but please do not insult the rest of us who understand or find VALUE in quality built systems.

All of which are replaceable for less than $200. The increase in initial cost does not justify the purchase, plain and simple. I seem to remember and you failing to provide details on these supposed higher quality components. When you can do that, maybe your statement will have some validity. Until then, it's the equivalent of saying your "good" system is better than our "fine" systems.

A $38 membrane does not get you 99.25% rejection unless you are very lucky. Yes an occasional one comes out in excess of 98% but its very rare and is not guaranteed to do so.

So, what does get you a guaranteed accurate rejection percentage? I'm sure that for the more expensive RO systems out there, you send them a sample of your source water and they test it against that, right? Or no? Because if not, then even a "high-end" dealer's claims are suspect.

Firstly MOST users would not even know to change the membrane. Secondly, MOST users would not know what kind of membrane to buy. Thirdly, MOST of the "eBay" vendors peddle lesser membranes but advertise them in a manner that portrays them as superior to the DOW FILMTECS. Nothing like buying from a dishonest vendor! Moreover, it is not a simple $38 difference. You are ignoring all of the OTHER problems with the units.

Funny, my Ebay unit for $92 has a Dow membrane. Considering there are very few membrance manufacturers out there, there aren't many options to choose from. What OTHER problems? I've never experiences a one of them. I've seem high-$ SpectraPure units that put out crap water. What about THOSE problems? Or do they not matter in your little world?

BTW, there are lots of non-Ebay seller where you can get nice RO unit cheaper than some big names with the exact same equipment. I don't begrudge them for selling them more (they've got advertising costs, etc.), so I wonder why you begrudge cheaper units? You've yet to provide any substantial evidence that more expensive units are better. Until you can do that, then I don't think anyone is impressed or convinced.

What he was trying to say was that the better filters have more surface area. Therefore, used under the same conditions as a SMALLER filter or one with LESS surface area, the better filter will show less visible signs of use.

And he, or you, would know this how? I have no clue what's in his water, and I'd guess that everyone's prefilters will look mighty different. Concluding yours are "better" based on visual observations isn't a really good basis for the assumption it's better. It says to me that for sure, the one guy's whose is dirty is filtering stuff out. How can I be sure about the other one? What if it's leaching things into the unit and destroying the membrane faster? Of course, it couldn't be doing that, oh no, because it "looks good". Good call there.

The PROBLEM is that it does equal out. There are masses of people out there paying out the nose to refill their DI chambers because they purchased junk from eBay. If you do not believe that, then I have a bridge for sale CHEAP.

Fair enough, but who's fault is that? If you're not bright enough to wonder why your DI cartridges don't last very long, then this likely isn't the hobby for you. My unit has made me about 300g of 1-2 TDS water so far with no discoloration so far. When it gets worn down to the point things need replacing, I'll likely upgrade a part or two. $92 well-spent. Still works just "fine" in my books.

BTW Mr. Scientist did you Mean "Micron Rate" or "Micron Size"

Micron rating would have been more accurate. Sorry if I made that difficult for you to decipher. Here I thought with all your other insightful thoughts a smart guy like yourself would be able to figure that one out. My apologies. :rolleyes:
 
<a href=showthread.php?s=&postid=9758578#post9758578 target=_blank>Originally posted</a> by rubikcube

My point(that you keep ignoring) is that you can take the ebay unit and replace the filters with new ones from thefilterguys and still come out way ahead on cost in the long run.

I think your the one who keeps missing the point.
It's not just the RO filter that makes the difference, it's the whole package. My ebay unit was constantly developing small leaks, because of the cheap connectors they used. The white Prefilter housings made it impossible to know the condition of the filters without opening them, the DI canister was small, horizontal and not refillable. All these things add up to why we say get the good unit at the start and you will be better off.
 
<a href=showthread.php?s=&postid=9758679#post9758679 target=_blank>Originally posted</a> by RobbyG
I think your the one who keeps missing the point.
It's not just the RO filter that makes the difference, it's the whole package. My ebay unit was constantly developing small leaks, because of the cheap connectors they used. The white Prefilter housings made it impossible to know the condition of the filters without opening them, the DI canister was small, horizontal and not refillable. All these things add up to why we say get the good unit at the start and you will be better off.

My eBay unit uses teflon tape, a clear housing for the sediment filter and a refillable DI. I would have complained about the leaks to your CC company or Paypal.
 
Wow! I just got done reading all the posts on this thread.

In 1999 I went out and bought a brand new Honda Shadow 750 motorcyle. I loved that bike. It had liquid cooling and could sit in New York City traffic for hours. The heckling from, the more expensive, Harley Davidson crowd drove me to sell my little Honda and buy a factory custom HD Deuce 100th anniversary editon no less. Cost of the Honda $6,999.00 plus tax. Cost of the Harley $17,250 plus tax.

The differance? I don't get heckled by the Harley crowd anymore but the bike goes through some serious girations when I sit in traffic. Darn air cooled engine. I miss liquid cooling. Now when I pass someone on a Honda and they wave to me I wave back. When I pass someone on a Harley I give them the finger.

I too bought a Devoneb from ebay. TDS reading before DI, 4 ppm. Changed out to a Dow tec 75 gpd and 1 micron sediment filter, .5 micron carbon block, and Chloramin buster, with a vertical 10 inch di canister. TDS reading before di? 2 ppm. I'm dieing to give somone the bird.........

Ride safe
Ordy
 
Dow Tech Membrane

$38: http://cgi.ebay.com/Dow-Filmtec-Rev...ryZ20684QQrdZ1QQssPageNameZWD1VQQcmdZViewItem


Clear Prefilter Canisters that are twice the size and made out of plastic twice as thick

$16-17: http://www.customaquatic.com/customaquatic/subsubcategorypage.asp?subcatindexid=ro-fih-sm

Hose connections that are vastly superior

These should all be John Guest fittings. If you got something else, then you've got a REALLY cheap RO unit. Either way, $10-12 should replace pretty much all your fittings on a unit, with the possible exception of the flow restrictor.

Vertical Refillable DI cartridge that 3 times the Size of the EBay unit.

$25: http://www.customaquatic.com/customaquatic/subsubcategorypage.asp?subcatindexid=ro-rfi-di

Okay, so assuming you replace ALL your filter housings with clearn, your RO membrane with a 75gpd >98% rejection rate and added a filter housing for your new DI medi, your total cost would be $111, for almost a completely new unit...
 
RCS your whole post is so long that very few people are going to read it, much less respond.
If your trying to win a argument by creating a posts so long that no one will respond, you may just have succeeded.
 
<a href=showthread.php?s=&postid=9758813#post9758813 target=_blank>Originally posted</a> by RobbyG
RCS your whole post is so long that very few people are going to read it, much less respond.
If your trying to win a argument by creating a posts so long that no one will respond, you may just have succeeded.

Best retort ever.
 
Last I checked JG fittings were a few bucks each, valves even more. Last I checked, you have to pay for shipping when you order items. What about high quality poly hose? The cheap stuff brittles and bursts after a few years of service.

What about the filters? Accessories? DI resin quality.

Why by something, just to dismantle it, order new parts and have to rebuild it. Why do it when in reality you will save little or nothing? Why do so and end up with something that is no better than what you could buy already put together.

Notice that with each passing post, you (the peole who pose this arguement) concede a little more. So all of the ranting and raving about hundreds of dollars of difference and brainwashed big spenders is now about difference of a few bucks.

Bean
 
The statement is made over and over again that you will spend more in the long run with the eBay units than you will with a "quality" unit from thefilterguys or Spectrapure. I'm trying to show why this just plain isn't true.
Then why in the world are you comparing SpectraPure to TheFilterguys. Honestly... this is absurd...
 
<a href=showthread.php?s=&postid=9758918#post9758918 target=_blank>Originally posted</a> by BeanAnimal
Then why in the world are you comparing SpectraPure to TheFilterguys. Honestly... this is absurd...


Mostly to show that AZDesertRat is flat out wrong about his claims regarding the MaxCap unit. He still hasn't posted the numbers he promised. I'd also like to know how much he paid, including shipping and whether he upgraded to the Spectraselect membrane.
 
Yes, a Win by Boring your opponent to death

Is still a win nonetheless.

I guess I generally try and be complete and thorough in my readings and responses. Maybe that's asking too much of some other people though, hence the half-witted, half-finished responses that seem to come from the "smart guys" here.

I can see how these threads can get to be many pages long, judging by the adherence of some people to flawed math and belief theories. I've had my say, you guys enjoy your snide remarks and suspended reality. Hopefully someone can read through the BS and be a little better off for it.
 
I think AZ took off ages ago because he found this thread to be pointless. So I doubt you are going to see him posting back to this thread.

This whole Ebay stuff has been proven over and over and over, it's really now become a waste of time. In future I will just point people to the dozens of threads on the subject and let them decide if they still want to waste their money on a Ebay filter.
 
This whole Ebay stuff has been proven over and over and over, it's really now become a waste of time.

Proven??? Your definition of proven must be different from mine, since proof is infallible and cannot be discredited. A few anecdotal examples and flawed math does not constitute proof.
 
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