PRISTINE FILTRATION, INC. - Spring Roll FAQs - Montrose, CO
PRISTINE FILTRATION, INC. - Making clean water possible for Anyone, Anywhere

1.  I realize that it will depend upon the initial sediment in the water, but what do you estimate the average number of gallons filtered before the filter components need to be cleaned?

If the water being filtered is reasonably clear, but from a source such as a river or lake or otherwise unregulated source, I would recommend cleaning the components after about ten uses, and no more than thirty from any source.  This would just prevent build-up of materials that would clog the filter or severely reduce flow rate, especially if the filter is allowed to dry out between uses.  For the best performance, I recommend cleaning the filter or at least wiping it down and drying it between uses to prevent mold, bacterial growth and mineral build-up, etc...

2. Can you estimate the total number of gallons that can pass through the ceramic filter before it has to be replaced as opposed to cleaned?

The ceramic filters can really last a long time, as the surface, which will catch the most sediment and pollutants can be completely renewed when it is lightly sanded.  If proper care is taken with the filters, including occasional sanding, they can last through a hundred gallons or more.  It really depends on the quality of water, mineral contents, and maintenance.  With proper maintenance, a filter can be used regularly for up to six months.  When the flow is reduced to an unsatisfactory rate it will be time to replace the ceramic component.

3. Can you supply the flow rate for the filter? It would be helpful to know what the estimated maximum rate would be.

Flow rate increases with saturation of the filter, so the first hour will be the slowest.  It may depend on elevation too, as they seem to flow faster in lower elevations.  I have a flow rate of about one gallon/hour here in Colorado Springs, though near Dallas, Texas, where our shipping and receiving headquarters are, they have put out ten gallons/hour. 

If people are camping, it is ideal to hang a full Spring Roll in the evening, and by morning, there will be three gallons of clean water waiting for them!  They are not the fastest filters, but they are as effortless as they get for the quantity, portability and price!

4. How does this filter conform with the EPA Guidelines?

We have not yet had our filters tested to EPA standards, though they have been tested for bacterial removal and have consistently removed four logs (99.99%) of environmental and laboratory bacterial samples.  Bacteria such as Ecoli, and protozoa such as Cryptosporidium and Giardia should effectively be removed.  In an emergency or outdoors situation, microbiologicals are the most important contaminants to be prepared against. Our products have been used for years in disaster situations and remote locations with no reports of illness from water that has been filtered by them.

5. With regard to the micron size limit for filtration, you state that it is 0.7 when the filter is new. At what point does this begin to diminish?

I am glad you asked about the initial pore size!  A very appealing aspect of the ceramic technology that we use is that with use, the pore size is reduced.  This is due to the fact that filtrates build up and block portions of the interior of the ceramic. They essentially line the walls of the pores, which are tiny and labyrinthine to begin with.  So with use, only smaller and smaller particles will be able to penetrate the ceramic of the filter, making the water cleaner than when the filter was brand-new.  Eventually, this is what leads to reduced flow rate, but again, sanding the surface of the ceramic prolongs the life of the filter dramatically.

*If your questions were not answered here, PLEASE feel free to contact Jillyn Soong for more information.
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