Im looking at RODI filters from a couple of sources new / used and most of them are rated at their output … 80GPD etc. How long does a RO/DI last for before I have to change filters? and since this depends on how often you use it, the better quesiton is how many gallons can I product before my TDS starts reading more than 0-5?
I’d only pay a couple dollars for used. Take a look at pricing replacement membranes and filter cartridges and consider you’ll probably need to clean it out. The majority of the price is with this parts so used often isn’t worth it unless it is dirt cheap.
Length of time is tough to say. The prefilters and DI may last you 6 months, but the membrane should last a couple years. Really depends though and don’t take my word alone I would read up more and look for others opinions. Take a look at airwaterice.com thefilterguys.biz bulkreefsupply.com and buckeyefieldsupply. Those four are often the best price and support.
I’ve been happy with my unit from airwaterice, 75gpd unit. had it for about a year and a half making about 120g a month. I’ve replacd the first pre filter twice, and the di resin twice. I should replace the two carbon filters also by now, they’re on my xmas list.
def get a tds meter also, i use a $15 handheld, a necessity imo…
I gotta do more research for sure. I don’t quite understand how much benefit an extra membrane adds to the unit, for example does that increase GPD or just quality , or how long the unit goes without replacement.
As for the second post by saltcreep, which unit did you get on airwaterice?
[quote=“snupa, post:4, topic:4784”]
I gotta do more research for sure. I don’t quite understand how much benefit an extra membrane adds to the unit, for example does that increase GPD or just quality , or how long the unit goes without replacement.
As for the second post by saltcreep, which unit did you get on airwaterice?[/quote]
getin touch with russ at buckeye. he’s an honest guy, very lknowledgable.
this is the one i have…
I’m happy with it, the di resin i bought from BRS lasted a lot longer then what came with it. The unit seems pretty close to all others in that price range ( +/- $30-$50), i chose 75gpd because it had the best rejection rates in that price range… I decided on this one because i liked that it was all mounted on one rail, and comes with a tds meter, and they offer a club discount, and they also send the parts to hookup to whatever type water connection you have. Good customer service quickly via email, and it was shipped quick, and packed nicely with very thorough instructions.
My neighbor is getting ready to buy one, and wants my best opinion… i just say i’m very happy with mine and would buy the same one again… Is it the best? cheapest? i dunno, but i have zero complaints and zero tds :
:
i dunno, but i have zero complaints and zero tds ::
zero zero is exactly what u want in a rodi, john.
brs is the only way to go for refillable di resin!
are there any articles you guys recommend to read that cover RO/DI filters?
[quote=“dunk, post:8, topic:4784”]
brs is the only way to go for refillable di resin![/quote]
All the parts on RODI are standard and exchangeable. Can by any brand and use any other brands replacement parts. Makes it easy that way. I purchased the RO I am using now from thefilterguys, but all the parts, but the membrane were replaced with parts from bulkreefsupply.
Don’t really need an in depth article and I am not aware of one. You want to have at least 2-3 prefilters and it would be best to have two DI. Two DI will keep you from tossing one of them before it is fully exhausted. You replace one DI at a time as needed when your TDS appears above 0 or if it’s been 6 months and you think it is done from physical appearance.
I completely agree with John, RODI can be no help at all with out a TDS meter. It will tell you if a mistake was made in install and something wasn’t seated properly. Your TDS after RO should be below 10(and more like below 4) and after DI should ALWAYS be 0. Note on TDS there is often a 1-2 minutes period where you’ll get high TDS each time the unit is first turned on. Also the first time it is run you should discard the first ~4-5 gallons or so.(check with manufacturers for specifics)
I’d recommend and inline TDS meters, two stage DI, and a flush valve for optimum performance. That being said if the budget does not permit for all of the above stick with two prefilters(ro membrane and a TDS meter as the bare minimums and add on later. VERY easy to add onto an RODI, you’ll be shocked at how simple.
Oh and booster pumps in my opinion waste more electric then they save on water in my opinion. Would be great if someone crunched the numbers again, but in this area water isn’t scarce and water bills are not as high as electrical bills. Either looking at things from a long term budget point or ecofriendly, the last I looked booster pumps were a waste of money unless you have REALLY REALLY low PSI.
[quote=“Gordonious, post:11, topic:4784”]
Oh and booster pumps in my opinion waste more electric then they save on water in my opinion. Would be great if someone crunched the numbers again, but in this area water isn’t scarce and water bills are not as high as electrical bills. Either looking at things from a long term budget point or ecofriendly, the last I looked booster pumps were a waste of money unless you have REALLY REALLY low PSI. [/quote]
and of course you can’t tell that without a pressure gauge, which easily hooks into your… rodi.
mine never gets below 50 and is freq’ly at 60 psi. +1 on the inline tds.
i agree with john the tds creep frequent on off will have very high tds with the first 1-2 cups then high a while after that then should be 1-6 depending on how bad the incoming water is and temp. so turning it on and off on and off making frequent small waterchanges will kill the di faster. but fill a large sealed container once a month and discard a few gallons first before it hits the di will give best results and longer life
useful info! does the RO/Di have to be connected to the water supply constantly or can I pack it up and put it away when i dont use it… or does it hurt the filters when they dry out
if you put it away keep it full of water don’t let it dry out
[quote=“snupa, post:14, topic:4784”]
useful info! does the RO/Di have to be connected to the water supply constantly or can I pack it up and put it away when i dont use it… or does it hurt the filters when they dry out[/quote]
much easier to be connected right to house plumbing and more convenient. very very simple to do.
I hooked my RO up to the clothes Washer cold water spigot. I got one of those brass Y splitters with a ball valve for each outlet. hook the washer to one and the RO to the other. then i can turn off just the RO when the barrel is full, or overflowing on the floor.