Cruisers Forum
 


Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 28-06-2017, 09:24   #1
Registered User

Join Date: Nov 2010
Location: Southern California
Boat: Antares 44 catamaran
Posts: 105
How to maintain a dormant water maker?

How do folks maintain a dormant water maker, one that is not used for years?

I have received different advice from the manufacturer of my unit Parker (Village Marine Little wonder) from change preservative every 3-6 months to fresh water flush every week (that too much preservative can damage the unit).

Of course, I donít want to do anything on too frequent a basis!

I left preservative in my unit for last two years doing nothing, and have been told that my membrane is probably damaged as a result and that I should just wait until I recommission the unit for use and replace the membrane. In that case, should I just let the old preservative sit until I replace the membrane? Replace preservative every six months? Fresh water flush every week (not there every week so canít do that)Ö.
RickyEM is offline   Reply With Quote
Old 28-06-2017, 09:34   #2
Registered User

Join Date: Dec 2010
Location: W Carib
Boat: Wildcat 35, Hobie 33
Posts: 13,349
Re: How to maintain a dormant water maker?

At 2 years, I agree the membrane is probably shot. Some seals may be ruined too. No way to know except to fire it up and test it (purge it first of course). You need to refresh the pickling soluton anyway so I would go that route.

Propylene Glycol is becoming a favorite for picklng because it is easier on seals etc.
belizesailor is offline   Reply With Quote
Old 28-06-2017, 09:42   #3
Registered User

Join Date: Nov 2010
Location: Southern California
Boat: Antares 44 catamaran
Posts: 105
Re: How to maintain a dormant water maker?

Thanks

I am assuming I will have to replace the membrane when I want to use it again.

So I do a fresh water flush and put in new preservative now; what should I do in say 6 months. Continual cycles of new preservative for a membrane that is probably shot?

A tech guy at Village Marine told me

"I would recommend fresh water flushing once a week instead of preserving the unit. The preservative chemical is food based and safe, but if it is used numerous times it could do more harm to the unit. Fresh water flushing is the best option for a dormant system. "

But I can't always do a fresh water flush every week as sometimes I am away from the boat for months...
RickyEM is offline   Reply With Quote
Old 28-06-2017, 09:55   #4
Registered User
 
DeepFrz's Avatar

Cruisers Forum Supporter

Join Date: Mar 2006
Location: Winnipeg
Boat: None at this time
Posts: 8,462
Re: How to maintain a dormant water maker?

You may be interested in this video.
DeepFrz is offline   Reply With Quote
Old 28-06-2017, 12:20   #5
֍֎֍֎֍֎֍֎֍֎

Join Date: Apr 2006
Posts: 15,133
Re: How to maintain a dormant water maker?

Sounds like it would be less work and less money in the long run to decommission the unit and take it apart. Throw out the old membrane, clean and dry everything, close it up to prevent critters from nesting in it. Then when you want to put it back in use, buy a set of all new o-rings and a new membrane. Since o-rings degrade over time and probably will need to be replaced at some point regardless of the care...
Break it down, seal it up, then you can ignore it for however long is necessary, and start with a reliable unit when you re-commission it.
hellosailor is offline   Reply With Quote
Old 28-06-2017, 21:31   #6
Registered User
 
senormechanico's Avatar

Join Date: Aug 2003
Boat: Dragonfly 1000 trimaran
Posts: 6,978
Re: How to maintain a dormant water maker?

My Spectra is at least 17 yrs old.
I use it every summer in the PNW for several months.
I purge it with product water in the fall.
I refresh it in the spring with product water.
I use it every summer in the PNW for several months.

Rinse and repeat.
Original membrane and it puts out to spec.
TDS runs in decreasing numbers from 200 PPM after about 3 minutes from startup.
Then I save the water.
If I run it for an hour, I get down to around 120 PPM.

What's not to like about this scenario?
Granted, I'm not in the tropics, but...
__________________
There are now only two groups. Those who canít unsee and those who wonít look. All it takes is a tiny peek and the latter becomes the former.
senormechanico is offline   Reply With Quote
Old 28-06-2017, 23:45   #7
cruiser

Join Date: Jan 2012
Location: Pangaea
Posts: 10,856
Re: How to maintain a dormant water maker?

Quote:
Originally Posted by belizesailor View Post
At 2 years, I agree the membrane is probably shot. Some seals may be ruined too. No way to know except to fire it up and test it (purge it first of course). You need to refresh the pickling soluton anyway so I would go that route.

Propylene Glycol is becoming a favorite for picklng because it is easier on seals etc.
Ours was pickled with the Spectra preservative for six years continuously with no ill effect on the membrane. We unpickled it, and used it for 18 months without an issue with ppm tests in 300-500 range. Well within the acceptable range.

Eventually, we rebuilt that unit and changed the membrane at that time.
Kenomac is offline   Reply With Quote
Old 29-06-2017, 08:37   #8
Registered User
 
JDeachman's Avatar

Join Date: Oct 2016
Location: Tortola
Boat: Morgan 461
Posts: 31
Re: How to maintain a dormant water maker?

Senormechanico: What is "product water"? Is this different from pickling.
JDeachman is offline   Reply With Quote
Old 29-06-2017, 09:15   #9
Registered User

Join Date: Jul 2012
Location: North East USA
Boat: 1975 Tartan 41'
Posts: 1,044
Re: How to maintain a dormant water maker?

Quote:
Originally Posted by softdown View Post
....

I would try to flush it with chlorinated tap water before storage. If you don't have chlorinated water handy, use a little bleach in some clean water.....
NO BLEACH OR CHLORINE! The chlorine will destroy the membrane. You never run bleach/chlorine through an RO membrane and that is why most manufactures put a carbon filter on the water flush line. There's a chance yours is not dead. As others have said, sometimes a pickled unit can go years without a problem. You don't know until you test it. I'm no expert, but I would flush with fresh water, then re-pickle with either the manufacture's solution or 100% food grade propylene glycol... maybe run a test with some salt water and see if it is good before flush and pickling?
zstine is offline   Reply With Quote
Old 29-06-2017, 09:22   #10
cruiser

Join Date: Jan 2012
Location: Pangaea
Posts: 10,856
Re: How to maintain a dormant water maker?

Quote:
Originally Posted by softdown View Post
I would try to flush it with chlorinated tap water before storage. If you don't have chlorinated water handy, use a little bleach in some clean water. I would think iodine would also work.

You are trying to kill off a runaway bacterial explosion while it is stored. There are likely a number of products that would work. The question is what is safe for the membrane. Chlorine and mild bleach are ok with normal membranes.
NO, NO, NO!
A 100% sure way to kill your membrane.
Kenomac is offline   Reply With Quote
Old 29-06-2017, 09:27   #11
Registered User

Join Date: Apr 2017
Location: Alamosa, Colorado
Boat: S2.....7.9/26'
Posts: 379
Re: How to maintain a dormant water maker?

Quote:
Originally Posted by Kenomac View Post
NO, NO, NO!
A 100% sure way to kill your membrane.
Do tell........I have professionally installed many, many R/O systems and membranes. Adams Aquatics, thats me, has been running for 24 years now. Installing and maintaining R/O for 23 of those years.

And your professional water purification background is? Let me guess....
https://en.wikipedia.org/wiki/Desalination
softdown is offline   Reply With Quote
Old 29-06-2017, 09:31   #12
cruiser

Join Date: Jan 2012
Location: Pangaea
Posts: 10,856
Re: How to maintain a dormant water maker?

Quote:
Originally Posted by softdown View Post
Do tell........I have professionally installed many, many R/O systems and membranes. Adams Aquatics, thats me, has been running for 24 years now. Installing and maintaining R/O for 23 of those years.

And your professional water purification background is? Let me guess....
https://en.wikipedia.org/wiki/Desalination
I place my trust in the Spectra recommendations aka Tellie on this forum and Rich at RO on this forum.

Please explain why your recommendations differ from the other manufacturer's recommendations by 180 degrees? Why do you recommend the exact opposite?
Kenomac is offline   Reply With Quote
Old 29-06-2017, 09:48   #13
Registered User
 
Cheechako's Avatar

Join Date: Aug 2006
Location: Skagit City, WA
Posts: 24,782
Re: How to maintain a dormant water maker?

Your membrane may be shot, but often that's not a huge deal unless your manufacturer uses a proprietary one that they overcharge for. I worry a bit about leaving the pickling solution in the hi pressure pump. Will it corrode inside the piston pump?
If I were leaving a unit for a very long time I would consider removing the membrane, pickling it in a sealed bag, and flushing the system with fresh water or maybe even "safe" anti freeze left in for storage.
__________________
"I spent most of my money on Booze, Broads and Boats. The rest I wasted" - Elmore Leonard











Cheechako is offline   Reply With Quote
Old 29-06-2017, 10:01   #14
Registered User

Join Date: Mar 2007
Location: Santa Cruz
Boat: Boatless Again
Posts: 5,813
Re: How to maintain a dormant water maker?

Quote:
Originally Posted by softdown View Post
Do tell........I have professionally installed many, many R/O systems and membranes. Adams Aquatics, thats me, has been running for 24 years now. Installing and maintaining R/O for 23 of those years.

And your professional water purification background is? Let me guess....
https://en.wikipedia.org/wiki/Desalination
You may install R/O systems, but the rest of us can read.

From the Katadyn manual on preserving the membrane

(Caution: Never use chlorinated freshwater. This may damage the membrane.)

Those instructions weren't in the manual 20 years ago and it cost me a set of membranes.
donradcliffe is offline   Reply With Quote
Old 29-06-2017, 13:26   #15
Sponsoring Vendor
 
Tellie's Avatar

Community Sponsor

Join Date: Oct 2007
Location: Hollywood, Fl.
Boat: FP Athena 38' Poerava
Posts: 3,913
Re: How to maintain a dormant water maker?

opc orn: I'll let Rich, he loves this kind of stuff.opcorn :
Tellie is offline   Reply With Quote
Reply

Tags
water

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Water maker in (not so ) troubled water GALAWA Forum Tech Support & Site Help 1 14-05-2016 16:13
Engine Rpm For Water Maker HP Water Pump Burge Construction, Maintenance & Refit 3 21-11-2015 10:42
Innovative new kind of water maker - water from air avb3 Provisioning: Food & Drink 29 21-11-2014 17:27
Something I Thought was Long Dead was only Lying Dormant. Gaspee Meets & Greets 7 30-08-2014 19:31
Don't maintain it, win a brand new boat wrscmatt Construction, Maintenance & Refit 2 02-03-2006 11:45

Advertise Here


All times are GMT -7. The time now is 19:14.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2022, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2022, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.