water comeing from RO higher then going into the RO

What is your well/tap water TDS? RO only TDS before the DI? and final RO/DI TDS?
this is 182x10, 81, 65, 24 from left to right entering the system to exit
What is your water pressure and water temperature?
115-120 psi temp varies, since it come from external source outside temp is around 68 right according to my thermometer i can try running a little hot water on with it.
What is your exact measured waste ratio?
its at what it should be a 3:1 ratio tested the other day
as for CO2 never thought of it since its getting aerated to remove the sulfur. but it is 14.39
other info is PH 7.2 ( i address this with crush coral and argonite rock in my tank) and my DKH is 7.6

 

Way too much PSI. It needs to be set at 80

 

i put it at 100 now

 

Membranes work better at higher pressures so 115-120 is good as long as you have quality housings and fittings. I run at 100 psi myself and get 99.43% rejection.

So 182 down to 10 means your rejection rate is 94.5%. Not great but you can live with that. Your DI is definitely shot though. CO2 has a huge impact on DI life and since you can't detect it with a TDS meter it is often overlooked. There are methods for lowering CO2 as well as certain DI resins that perform better in the presence of CO2. Talk to the folks at Spectrapure, try to get to Bruce or Charles if possible and discuss it with them. They have helped me tremendously.

 

Interest. Manufacturer didn't recommend that but I guess I'll crank mine up.

 

so should i replace the RO membrane and di resin?

 

ok email was shot to spectrapure asking for Bruce or Charles explaining sitrap, i guess my tank can live with 20tds right now till i can get new DI resin in its not like there is anything in there right now its still cycling and from i read ro membranes should last 2+ years

 

ok i was wrong i did the Waste ratio agian and now i have 650:260 which is a 2.5 ratio

 

Vendors recommend lower pressures for liability reasons. Quality vendors carry membranes and components meet that ANSI and UPC codes and standards of 125 psi working pressure and test pressures are like 3x that much.

Spectrapure guarantees their systems and components but they will want all the same information I asked for to determine your conditions. Things that obviously help a membranes life are softened water, low dissolved solids which you seem to have at 180+/- (national average is more like 250) and good sediment and carbon filtration which if you are using their stuff is a given. If you know the carbonate hardness of the water, its pH and the CO2 levels it also helps.

Colder water actually treats better than warm water so never ever try to blend hot and cold, this is the quickest way there is to ruin a membrane. Remember being in the shower and someone flushes the stool or srats the washing machine? You got your tush scalded and the same thing happens to a membrane. They acnnot take anything over 113 degrees and thats not really all that hot. You will get lower TDS out of colder water than you will warmer water at the same pressure due to its viscosity or density.

 

Thanks for that. While reading through it i discovered my city is the fifth one in the list of "worst case areas". Sucks for me.