Gravity filters achieve extraordinary filtration due to the high amount of contact time the water has with the filter media.
These units are intended for use in situations where a reliable supply of safe drinking water is unavailable. Ideal for outdoor travelers, hikers, expeditions, missionaries, etc. Due to their effectiveness at eliminating water-born diseases such as cholera and typhoid, they are being specified for field operations by many of the worlds major aid and emergency relief organizations.
All portable water filtration systems are fitted with genuine Doulton® ceramic candles. Wing nut and gasket are included with every ceramic replacement element.
GSS Series - Stainless steel portable gravity water filters.
Made from high quality surgical grade stainless steel for maximum corrosion resistance. Telescopes for easy transport, it is lightweight, durable and easy to clean. Systems supplied complete, ready to use, including SuperSterasyl self-sterilizing ceramic elements and tap.
GSS Series Stainless steel portable gravity water filters with two Doulton® Imperial SuperSterasyl™ 7 inch filtration elements (candles) can produce over 20 gallons per day (GPD) of safe delicious drinking water.
Each filter chamber holds 2.25 gal.(9 L). GSS2-4 portable gravity filter specifications>.
Used by many of the world's leading relief organizations
including US Military.
A recent study by a leading UK University showed that use
of Doulton/British Berkefeld drinking water filters
in a community in Zimbabwe slashed cases of potentially
fatal diarrhea (a common problem in Africa caused by pathogenic
bacteria and cysts in the water supply) to virtually zero. Doulton/British
Berkefeld filters have been proven to work in the most demanding conditions.
Gravity SS assembling, operating and servicing instructions>>
Water filtration efficiency:
0.2 microns silver impregnated ceramic shell of SuperSterasyl™ candle
(Sterasyl™) effectively remove pathogenic bacteria such
as E.coli, cholera, salmonella, shigella, typhoid etc with greater
than 99.99% efficiency, 100% removal of pathogenic cysts such
as cryptosporidium parvum, giardia lamblia, guinea worm etc.
Inside the ceramic shell is packed bed of coconut shell granular
activated carbon ( GAC) for removal of chlorine, VOC's, industrial
solvents, bad taste and odor etc. For microbiologically effectiveness
the ceramic shell is self-sterilized (no need for boiling) and
can be cleaned up to 60 times before is worn off. For more information
on Doulton's world class ceramic filtration technology visit >>
| Absolute filtration rating >99.9999% |
0.9 microns absolute |
| Effective filtration rating >99.9% |
0.5 - 0.8 microns |
| >99.7% |
0.3 - 0.5 microns |
| >98% | 0.2 - 0.3 microns |
| E.coli bacteria |
>99.99% |
| Fecal bacteria |
>99.99% |
| Salmonella typhi |
>99.999% |
| Vibrio cholerae |
>99.99% |
| Klebsiella Terrigena |
>99.999% |
| Shigella disinteriae |
>99.999% |
| Serratia marcescenes |
>99.99% |
| Cryptosporidium cysts |
100% |
| Giardia cysts |
100% |
NOTE: It should be clearly understood that during tests performances the
concentration of bacteria fed to the filtration element is artificially
high in order to simulate a challenging test for the ceramic element.
The most aggressive "real life" condition would normally
be at least 1000 times less severe. |
Lightweight, durable, portable gravity water filter constructed of a high density polypropylene material.
(coming soon)
