Next message: Alan Lewis: "Re: lv-ab: binoculars"
At 08:33 PM 11/29/2005, Andina Marie Foster wrote:
>You can stick with a salt water membrane but you have to have an
>adjustable pressure regulator so you can drop the pressure as the
>salinity goes down. The aim is to keep the product water rate
>equivalent to the membrane design. For example if the manufacturer
>recommends 5% product water and 95% water flowing over the membrane
>then although it will put out much more than this is brackish water
>you must drop the pressure to get back to the same ratio. This makes
>sure there is enough flow and turbulence over the dirty side of the
>membrane to keep it clean. Too high a production rate will clog up
>the membrane.
>
>This can take some vigilance in places like the ICW where the
>salinity can change rapidly and frequently in some areas.
I used a PUR 40E watermaker almost every day for two years in salty,
brackish and fresh water. I never had a problem with the membrane nor
noticed any difference in production (I always checked on the first
bit to fill a jug for shutdown water). Could it be because the 40E is
low production? I honestly didn't know and didn't see anything in the
manual about it.
Is this like the air thing? To explain, West Marine (or BoatUS) info
stated that air would "explode" through the membrane and damage it,
but PUR stated in the manual, and when I called them, that air would
just cut down on production.
????????
Rick
------------------------------------------------
Absolute safety is a concept promoted by those
without the guts to live in the real world.
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