Does anyone have a source for water maker RO membranes? They all seem to
be made by DOW and the various water maker manufactures mark them up a LOT
as they're now a *marine* product. :-) A friend of mine says that he
bought some online for about 1/3 of what the water maker manufacturer was
asking, but he's off cruising and can't remember the web site.

-- Geoff

"Geoffrey W. Schultz" a écrit dans le message de
.17...
Does anyone have a source for water maker RO membranes? They all seem to
be made by DOW and the various water maker manufactures mark them up a LOT
as they're now a *marine* product. :-) A friend of mine says that he
bought some online for about 1/3 of what the water maker manufacturer was
asking, but he's off cruising and can't remember the web site.

-- Geoff

Ask to Mark Fruehauf
www.great-water.com

Best regards

DOMINIQUE ROUSSELON

Yes, the membranes are made by few manufacturers. The question is how
are you going to "pot" /encapsulate the 'ends' of the sprial with
molten polypropylene, etc. to make them seal and be dimensionally
correct for your housing? Its not ONLY the membranes; but, also the
endcaps, the side seals, the separators, the upstream and downstream
support materials. It also includes 'integrity' testing as the
membrane is not a consistant product that has a high manufacturing
yield .... much of this stuff has 'holes' and needs to be verified,
etc.

Go to www.osmonics.com etc. and see if you cant find a spiral wrapped
package that fits into your housing.

Better yet, if you have to ask these questions, better trust someone
other than yourself to construct the cartridge.


In article , D.Rousselon
wrote:

"Geoffrey W. Schultz" a écrit dans le message de
.17...
Does anyone have a source for water maker RO membranes? They all seem to
be made by DOW and the various water maker manufactures mark them up a LOT
as they're now a *marine* product. :-) A friend of mine says that he
bought some online for about 1/3 of what the water maker manufacturer was
asking, but he's off cruising and can't remember the web site.

-- Geoff

Ask to Mark Fruehauf
www.great-water.com

Best regards

DOMINIQUE ROUSSELON

99% of the recreational watermakers use one of two standard size
membranes. 2.5" diameter and either 20" or 40" nominal length. The
product nipples are all the same size and seal in the end of the vessel
with an O ring. No custom fitting should be required at all. Also, 90%
of the US assembled recreational systems use A&M pressure vessels.
(white with black end caps)

I do know that one of the more popular brand (I don't remember which)
uses a custom length Filmtec that is about 15" long as I recall. If you
have one of those you are screwed because they want 3 times the street
price of standard membranes.

Rich Hampel wrote:
Yes, the membranes are made by few manufacturers. The question is how
are you going to "pot" /encapsulate the 'ends' of the sprial with
molten polypropylene, etc. to make them seal and be dimensionally
correct for your housing? Its not ONLY the membranes; but, also the
endcaps, the side seals, the separators, the upstream and downstream
support materials. It also includes 'integrity' testing as the
membrane is not a consistant product that has a high manufacturing
yield .... much of this stuff has 'holes' and needs to be verified,
etc.

Go to www.osmonics.com etc. and see if you cant find a spiral wrapped
package that fits into your housing.

Better yet, if you have to ask these questions, better trust someone
other than yourself to construct the cartridge.


In article , D.Rousselon
wrote:


"Geoffrey W. Schultz" a écrit dans le message de
04.17...

Does anyone have a source for water maker RO membranes? They all seem to
be made by DOW and the various water maker manufactures mark them up a LOT
as they're now a *marine* product. :-) A friend of mine says that he
bought some online for about 1/3 of what the water maker manufacturer was
asking, but he's off cruising and can't remember the web site.

-- Geoff

Ask to Mark Fruehauf
www.great-water.com

Best regards

DOMINIQUE ROUSSELON



--
Glenn Ashmore

I'm building a 45' cutter in strip/composite. Watch my progress (or lack
there of) at: http://www.rutuonline.com
Shameless Commercial Division: http://www.spade-anchor-us.com

99% of the recreational watermakers use one of two standard size
membranes. 2.5" diameter and either 20" or 40" nominal length. The
product nipples are all the same size and seal in the end of the vessel
with an O ring. No custom fitting should be required at all. Also, 90%
of the US assembled recreational systems use A&M pressure vessels.
(white with black end caps)

I do know that one of the more popular brand (I don't remember which)
uses a custom length Filmtec that is about 15" long as I recall. If you
have one of those you are screwed because they want 3 times the street
price of standard membranes.

Rich Hampel wrote:
Yes, the membranes are made by few manufacturers. The question is how
are you going to "pot" /encapsulate the 'ends' of the sprial with
molten polypropylene, etc. to make them seal and be dimensionally
correct for your housing? Its not ONLY the membranes; but, also the
endcaps, the side seals, the separators, the upstream and downstream
support materials. It also includes 'integrity' testing as the
membrane is not a consistant product that has a high manufacturing
yield .... much of this stuff has 'holes' and needs to be verified,
etc.

Go to www.osmonics.com etc. and see if you cant find a spiral wrapped
package that fits into your housing.

Better yet, if you have to ask these questions, better trust someone
other than yourself to construct the cartridge.


In article , D.Rousselon
wrote:


"Geoffrey W. Schultz" a écrit dans le message de
04.17...

Does anyone have a source for water maker RO membranes? They all seem to
be made by DOW and the various water maker manufactures mark them up a LOT
as they're now a *marine* product. :-) A friend of mine says that he
bought some online for about 1/3 of what the water maker manufacturer was
asking, but he's off cruising and can't remember the web site.

-- Geoff

Ask to Mark Fruehauf
www.great-water.com

Best regards

DOMINIQUE ROUSSELON



--
Glenn Ashmore

I'm building a 45' cutter in strip/composite. Watch my progress (or lack
there of) at: http://www.rutuonline.com
Shameless Commercial Division: http://www.spade-anchor-us.com

Yes, the membranes are made by few manufacturers. The question is how
are you going to "pot" /encapsulate the 'ends' of the sprial with
molten polypropylene, etc. to make them seal and be dimensionally
correct for your housing? Its not ONLY the membranes; but, also the
endcaps, the side seals, the separators, the upstream and downstream
support materials. It also includes 'integrity' testing as the
membrane is not a consistant product that has a high manufacturing
yield .... much of this stuff has 'holes' and needs to be verified,
etc.

Go to www.osmonics.com etc. and see if you cant find a spiral wrapped
package that fits into your housing.

Better yet, if you have to ask these questions, better trust someone
other than yourself to construct the cartridge.


In article , D.Rousselon
wrote:

"Geoffrey W. Schultz" a écrit dans le message de
.17...
Does anyone have a source for water maker RO membranes? They all seem to
be made by DOW and the various water maker manufactures mark them up a LOT
as they're now a *marine* product. :-) A friend of mine says that he
bought some online for about 1/3 of what the water maker manufacturer was
asking, but he's off cruising and can't remember the web site.

-- Geoff

Ask to Mark Fruehauf
www.great-water.com

Best regards

DOMINIQUE ROUSSELON

"Geoffrey W. Schultz" a écrit dans le message de
.17...
Does anyone have a source for water maker RO membranes? They all seem to
be made by DOW and the various water maker manufactures mark them up a LOT
as they're now a *marine* product. :-) A friend of mine says that he
bought some online for about 1/3 of what the water maker manufacturer was
asking, but he's off cruising and can't remember the web site.

-- Geoff

Ask to Mark Fruehauf
www.great-water.com

Best regards

DOMINIQUE ROUSSELON

http://www.appliedmembranes.com/
"Geoffrey W. Schultz" wrote in message
.17...
Does anyone have a source for water maker RO membranes? They all seem to
be made by DOW and the various water maker manufactures mark them up a LOT
as they're now a *marine* product. :-) A friend of mine says that he
bought some online for about 1/3 of what the water maker manufacturer was
asking, but he's off cruising and can't remember the web site.

-- Geoff

http://www.appliedmembranes.com/
"Geoffrey W. Schultz" wrote in message
.17...
Does anyone have a source for water maker RO membranes? They all seem to
be made by DOW and the various water maker manufactures mark them up a LOT
as they're now a *marine* product. :-) A friend of mine says that he
bought some online for about 1/3 of what the water maker manufacturer was
asking, but he's off cruising and can't remember the web site.

-- Geoff