Finding ultra-pure water locally...

Guys, I have had a home RO filter for 30 years. It get replaced once a year. At the end of the year the water has about 300 non-water parts per million. After it is replaced this is 3 per million. Our chemistry department has a much higher quality RO device. They certainly were not impressed with my home results but did not mention what theirs yielded.

Hdm, assuming that you meant to add distillation to reagent water, I cannot imagine that adding salt back in as a softener would be used.

Cello, my tests also show that ultra pure water is superior at least as a final rinse to RO water.

Tbg: My comments regarding distillation were only with respect to the fact that distilled water is a far cry from ultrapure as the original poster intimated (ie. ultrapure, lab grade, triple distilled all essentially being the same).

With respect to softening, it can be and is often used as the very first stage (followed by 5 or 6 others) in producing ultrapure water.

Hdm, the reason we have a RO device is that the sodium content of our water is quite high, but it could not be softer or we would never get soap off our bodies. I would just imagine that even a home RO machine would easily get lime or other minerals out of the water as easily as it would get salts out.

The Rep for Peak Battery Water has said that their water has been de-ionized and de-mineralized. He also said the water had been subjected to RO and repeatly filtered. I purchase Peak @ Pep Boys Auto for $4.00 a Ga.Very little information on the water product beyond Battery Water is listed on the lable. Since I use Peak to Steam Cleaning LPs combo'ing with RCM and a fast acting record drying/destatic machine, used in that combination, I haven't had static problems w/ cleaned recordings.

Readers: A funny thing happen on the way to Super Pure Water.

Following suggestions made on a couple of Threads I set out with correct vinyl Gallon container in hand for Water from three recommended places Whole Foods, a Organic FoodStore and a Pet Fish Shop.

Firstly, the water sources available for people consumption had all been doused with minerals, and Fish Shops in my area say the source water in this part of Maryland is so clean out of the tap they only charcole filter before using in the fish tanks.

Well no brass ring, so the journey continues for cheap sources of SP Water .