Hi Gang
I got my RO/DI unit yesterday and started performing some tests on it. I hooked up the unit and flushed it for 1/2 hour then shut the flush valve and let it run for another hour as per the directions. The first test was checking the TDS value of the tap water. Connected the water feed directly to the DI unit which has the TDS meter mounted to it and turned the water on (I'll get a picture of this test on the next installment)and the reading was 035 PPM on the input and 000 PPM on the output (Also reversed the input and output sensors to check the validity of the meter, The 035 PPM remained on the output side whether the input or output sensor was on the ouput side ). The next step I connected the first 4 stages, then from the output of the 4th stage connected the 5th stage (DI unit with the TDS meter) and took some readings. After the 4th stage the TDS was knocked down to 004 PPM and the output of the 5th stage was also 000 PPM. Here are the pics for this test.
Input value after 4th stage
Output value after 5th Stage (DI Unit)
I'm going to perform 1st test again with photos, along with testing straight tap water, RO/DI waste water, and actual RO/DI water with the test kits we use and post the results. My question now is why is the output of all 5 stages the same as just going through the 5th stage only (DI unit with TDS meter)? Another question is according to the TDS meter what is your opinion about the quality of the water in Brooklyn?
I got my RO/DI unit yesterday and started performing some tests on it. I hooked up the unit and flushed it for 1/2 hour then shut the flush valve and let it run for another hour as per the directions. The first test was checking the TDS value of the tap water. Connected the water feed directly to the DI unit which has the TDS meter mounted to it and turned the water on (I'll get a picture of this test on the next installment)and the reading was 035 PPM on the input and 000 PPM on the output (Also reversed the input and output sensors to check the validity of the meter, The 035 PPM remained on the output side whether the input or output sensor was on the ouput side ). The next step I connected the first 4 stages, then from the output of the 4th stage connected the 5th stage (DI unit with the TDS meter) and took some readings. After the 4th stage the TDS was knocked down to 004 PPM and the output of the 5th stage was also 000 PPM. Here are the pics for this test.
Input value after 4th stage
Output value after 5th Stage (DI Unit)
I'm going to perform 1st test again with photos, along with testing straight tap water, RO/DI waste water, and actual RO/DI water with the test kits we use and post the results. My question now is why is the output of all 5 stages the same as just going through the 5th stage only (DI unit with TDS meter)? Another question is according to the TDS meter what is your opinion about the quality of the water in Brooklyn?