|
|
 
Posts: 12924
Member Since:
9/25/2003
Location: Mexico | Any comments on these, do they work, how much work are they to operate, total H2O per cartridge using sea water to fresh, etc?
http://www.jandhproducts.com/product.asp?pf_id=12600 |
|
| |
|
| |
|
Posts: 787
Member Since:
7/12/2006
Location: nhills area. N.C. | I could not find the cartridge volume max but surprisingly West Marine had the best price I could find and says it does require annual maintenance.
http://www.westmarine.com/webapp/wcs/stores/servlet/producte/10001/... |
|
| |
|
 
Posts: 4105
Member Since:
1/2/2006
Location: Way out west | Bull: The 06's do work, but remarkably slowly. You have to develop pretty high pressure to force the water through the RO membrane and the short handle on the PUR 06 can make that a real bear to do. It comes with a strap so you can tie it to your leg, but it still is marginal. The PUR 35 is quite a bit bigger, but also has a longer handle and while it will make 1.2 gallons of water an hour, it also has to be pumped constantly to do it. I don't look forward to being in a raft in the hot sun and sweating out as much water as I am making. I think that is exactly what will happen with the PUR 06. You can pick the 35's up pretty cheap on eBay. New or used, you still have to hit them with biocide to kill anything growing in them once a year. West carries it and it is not expensive.
Bottom line: The 06 is great in the forest or in Alaska, but the 35 is the tropical duty version. |
|
| |
|
Posts: 4105
Member Since:
1/2/2006
Location: Way out west | More data: These are reverse osmosis units, so the cartridges will make hundreds or thousands of gallons before they need to be replaced. They are not like resin based deionizing systems. The water will get less pure over time, but if the unit is in good shape, it will make 15 ppm water. The PUR 06 will make a quart an hour when pumped constantly - and you'll earn every drop. |
|
| |
|
Posts: 12924
Member Since:
9/25/2003
Location: Mexico | kerno - 7/1/2008 4:19 PM
More data: These are reverse osmosis units, so the cartridges will make hundreds or thousands of gallons before they need to be replaced. They are not like resin based deionizing systems. The water will get less pure over time, but if the unit is in good shape, it will make 15 ppm water. The PUR 06 will make a quart an hour when pumped constantly - and you'll earn every drop.
Thanks Kerno.
I have a lot of experience with RO units, and they will clog themselves if a prefilter does not remove a los of the solids upstream from the osmotic membrane, and
an acid wash is not applied to kill bactria and help control pH to nuetral.
Also, the units produce a % of product and and % of flush that carries away the solids. So when it says it will produce x ounces of potable water, that will be much higher with fresh water as its feed, and much lower per stoke when feed brackish saltwater.
|
|
| |
|
Posts: 4105
Member Since:
1/2/2006
Location: Way out west | I first met hand pump units for camping, when the bacteria scares hit. Supposedly you could make drinkable water out of a mud puddle, since the membrane pores are smaller than bacteria. Are they smaller than a virus? I don't know. Being as strange as I am, I've tried both the PUR 06 and the PUR 35 in seawater. You have to make a fair amount of water to purge the biocide and then you get water that tastes pretty good and will keep you alive. I tried 'em in pretty clear tropical seawater. Obviously the more plankton and other life you are filtering out, the faster they will plug up. On board systems do have decent prefilters, but I figure for raft usage, if I can get 30 gallons, I am in good shape. Me? I have a 35 in my ditch bag.
Edit: I wonder if plankton will actually plug them up. They sure work well and don't plug up in a DE swimming pool filter!
Edited by kerno 7/1/2008 10:56 PM
|
|
| |
|
Posts: 1557
Member Since:
9/2/2003
Location: New Port Richey, Florida | While I understand the need to have one one of these in a ditch bag "back in the day", unless you're doing an ocean crossing are they still necessary?
Assuming there's a GPS EPIRB/PLB aboard, wouldn't one anticipate rescue before one of these would become necessary in most cases?
I keep a 12 pack of bottled water aboard next to the where the raft and ditch bag are stowed. |
|
| |
|
Posts: 6556
Member Since:
6/6/2001
| Can't you somehow use iodine or chlorine or some chemical or pre filter to neutralize or get the bad stuff out first then use the RO just to remove the salt?
In fresh water - crap, just use iodine tabs - one if clear 2 if cloudy. Seemed to work for me. |
|
| |
Survival watermakers
