Reply
 
Thread Tools Search this Thread Display Modes
 
Old 10-30-2019, 06:44 PM   #1
Guru
 
Woodland Hills's Avatar
 
City: Jacksonville
Country: USA
Vessel Name: Alzero
Vessel Model: Hatteras 63' CPMY
Join Date: Apr 2017
Posts: 833
Shelf life of watermaker membrane

How long can I store an unopened membrane? My current membranes are at least 5 years old and while they still worked fine a couple of months ago when I last used the unit. Iíll be in the Bahamas for the winter and am considering taking replacements for spare parts. My intention is to use the current pair until they fail and replace, I just donít want to spend a boatbuck on something that is perishable in storage.

The unit is a Sea Recovery Aquamatic 30 gph/720 gpd system.
__________________
Advertisement

Woodland Hills is offline   Reply With Quote
Old 10-30-2019, 06:59 PM   #2
TF Site Team
 
Larry M's Avatar
 
City: JAX, FL
Country: USA
Vessel Name: Hobo
Vessel Model: Krogen 42-120
Join Date: Nov 2008
Posts: 7,925
I’ve stored a membrane for 3 years. I’ve also lost one that was 2 months old when I chafed a pin hole in the packaging. The membrane dried out and was destined for the dumpster.

You could use the new membranes and pickle/package the old ones and enjoy the higher performance.
__________________

Larry M is offline   Reply With Quote
Old 10-30-2019, 07:37 PM   #3
Guru
 
Ken E.'s Avatar
 
City: Bellingham WA
Country: United States
Vessel Name: Hatt Trick
Vessel Model: 45' Hatteras Convertible
Join Date: Nov 2016
Posts: 964
Larry is probably right on the shelf life and the manufacturer could confirm it.

A question on changing the membrane in the boat...you mentioned you were headed for the Bahamas. I have a Village modular unit and changed the membrane a couple years ago. I removed the pressure vessel from the boat and took it home to my shop so I'd have the benefit of a work bench. Even then, the end caps are a very tight fit and must be precisely aligned on reassembly. Your Hatt is much bigger than mine, so you must have the access/ room to do it on the boat?
__________________
Ken on Hatt Trick
Ken E. is online now   Reply With Quote
Old 10-30-2019, 08:54 PM   #4
Guru
 
Woodland Hills's Avatar
 
City: Jacksonville
Country: USA
Vessel Name: Alzero
Vessel Model: Hatteras 63' CPMY
Join Date: Apr 2017
Posts: 833
Good question. I’ll take a closer look and see what I’ll need for the job. I have a couple of chain type strap wrenches and a small vise that I hoped would do the trick. If not I’ll have time to get what I need.
Woodland Hills is offline   Reply With Quote
Old 10-30-2019, 09:04 PM   #5
Guru
 
Ken E.'s Avatar
 
City: Bellingham WA
Country: United States
Vessel Name: Hatt Trick
Vessel Model: 45' Hatteras Convertible
Join Date: Nov 2016
Posts: 964
It's mostly access and room to work. In my case, no special tools were required. But realizing that the pressure vessel has to withstand 850 psi, the fits are very tight and precise. Hard to get the end caps off, no picnic to get them back on and aligned, keeping the O rings positioned right. None of the foregoing is impossible, just not easy at least for me.
__________________
Ken on Hatt Trick
Ken E. is online now   Reply With Quote
Old 10-30-2019, 09:52 PM   #6
Guru
 
Woodland Hills's Avatar
 
City: Jacksonville
Country: USA
Vessel Name: Alzero
Vessel Model: Hatteras 63' CPMY
Join Date: Apr 2017
Posts: 833
Thanks for the tips. I have a work bench with vise in the stb engine room to do the work. I was a motorcycle fork and shock tech in another lifetime revalving racing suspension so I’m not unfamiliar with that kind of thing. I’ll check my documentation for service instructions or a parts diagram. I assume I’ll need an o-ring kit too or do they come with the membranes like they do with Racors?
Woodland Hills is offline   Reply With Quote
Old 10-30-2019, 09:59 PM   #7
Guru
 
Ken E.'s Avatar
 
City: Bellingham WA
Country: United States
Vessel Name: Hatt Trick
Vessel Model: 45' Hatteras Convertible
Join Date: Nov 2016
Posts: 964
With my membrane, the O rings were included along with a tube of lube.
__________________

__________________
Ken on Hatt Trick
Ken E. is online now   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





All times are GMT -5. The time now is 10:04 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012
×