JammyBirch
Aquaria Engineering
Can I still use the water until I get new filters? This one has the built in reader with a flush valve... can I just flush it and get the reading down?
Rodi reading 0.001
- Thread starter JammyBirch
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JammyBirch
Aquaria Engineering
February this year but I didn't start using it until June
dkeller_nc
New member
What Sk8r said, but also keep in mind that a lot of RODI systems will read a slightly higher TDS when the unit has been setting for a while. It takes a minute or so for the unit to "flush down".
You don't say how much water you use from the system, or what your water source is (municipal, well water, etc...). If you use water only occasionally, and your source is relatively low in dissolved solids (typical for East Coast municipal water), you shouldn't have exhausted your DI resin so quickly.
If it is truly exhausted (and you're on low TDS municipal water), you may need to do a bit of troubleshooting on your RODI system. A leaking or displaced seal around the RO membrane, for example, can rapidly exhaust the DI resin from untreated feed water mixing with the RO membrane's product water.
You don't say how much water you use from the system, or what your water source is (municipal, well water, etc...). If you use water only occasionally, and your source is relatively low in dissolved solids (typical for East Coast municipal water), you shouldn't have exhausted your DI resin so quickly.
If it is truly exhausted (and you're on low TDS municipal water), you may need to do a bit of troubleshooting on your RODI system. A leaking or displaced seal around the RO membrane, for example, can rapidly exhaust the DI resin from untreated feed water mixing with the RO membrane's product water.
That^^^ Give a better explanation of the system. Get a reading of tap, after RO, and after DI. Is this a new system that sat of did you buy it used and it sat? How was it sitting before bringing it into use? Was the membrane stored wet?
JammyBirch
Aquaria Engineering
New system...I started using it in May. Town water that is less than 100tds. I use it once a week for 5 gallons of water, used foe my ATO. I have it mounted to the wall where there is no signs of a leak in any way. I have not flushed it ever...
First, Sediment and carbon block filter should be replaced every six months. These protect the more expensive RO membrane. Now how it works.
1. Sediment filter - used to keep out sediment down to a specific micron. This won't effect the TDS.
2. Carbon Block - used to help with leftover sediment down to a specific micron. Also used to remove chemicals in the supply water. These can damage the membrane if allowed to reach it. Won't effect TDS either.
3. RO membrane - This is the workhorse. It removes the TDS from the tap water. It does this by forcing water through a film membrane. It will have a rejection rate listed on it.
So how this works. Water passes through the two pre-filters. These remove sediments and chemicals. If you look at a TDS meter, the tap and after the two pre-filters are pretty close to each other. Neither of the pre-filters are used to remove TDS, they're used to protect the membrane. Next the water hits the membrane. Like said earlier, the membrane has a rejection rate. We'll use round numbers to make it understandable. Say the tap TDS is 100, and the rejection rate of the membrane is 95%. This will leave a TDS of about 5 after the RO membrane.
4. DI canister - This removes what's left. In the case above the final 5 TDS. This leaves 0 TDS at the end of the system. When the DI becomes exhausted, it begins to pass and release some of the bound TDS.
HTH
1. Sediment filter - used to keep out sediment down to a specific micron. This won't effect the TDS.
2. Carbon Block - used to help with leftover sediment down to a specific micron. Also used to remove chemicals in the supply water. These can damage the membrane if allowed to reach it. Won't effect TDS either.
3. RO membrane - This is the workhorse. It removes the TDS from the tap water. It does this by forcing water through a film membrane. It will have a rejection rate listed on it.
So how this works. Water passes through the two pre-filters. These remove sediments and chemicals. If you look at a TDS meter, the tap and after the two pre-filters are pretty close to each other. Neither of the pre-filters are used to remove TDS, they're used to protect the membrane. Next the water hits the membrane. Like said earlier, the membrane has a rejection rate. We'll use round numbers to make it understandable. Say the tap TDS is 100, and the rejection rate of the membrane is 95%. This will leave a TDS of about 5 after the RO membrane.
4. DI canister - This removes what's left. In the case above the final 5 TDS. This leaves 0 TDS at the end of the system. When the DI becomes exhausted, it begins to pass and release some of the bound TDS.
HTH
