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 20-01-2021, 19:37   #1
Registered User
 
Madehn's Avatar

Join Date: Nov 2014
Location: Kemah Tx
Boat: Gulfstar 51
Posts: 280
Do It YOurself Distilled Water

So as i am installing my new watermaker--i got one of those "flashes" wither the result of hitting my head on the hatch- again or perhaps just a new idea - I would love to have a source of distilled water on board to service my bank of FLA batteries (no i dont want to change lets not turn this into a battery thread ). i am thinking that i can add a tap to my present system and install a DI filter cartridge in line with that tap and have a source of water for my batteries at a pretty minimal cost as i already have an extra set of filtration cannisters including a twin setup - one for carbon filter then one for DI filter- that way i never have to worry about finding/carrying distilled water for the batteries- for the number of gallons that i would need both the carbon and the DI filter should last for a LONG time. What am i missing, this seems too easy. Has anyone done this?
Madehn is offline   Reply With Quote
Old 21-01-2021, 08:57   #2
Senior Cruiser
 
GordMay's Avatar

Cruisers Forum Supporter

Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 40,335
Images: 241
Re: Do It YOurself Distilled Water

The most common types of water used in batteries is distilled water, then deionized water, and water from reverse osmosis (R/O).
The water used for battery electrolyte preparation should be distilled, demineralized, or R/O, and have an electrical conductivity less than 10-5 ohm-1 cm-1, and pH between 5 and 7.
RO water is considered mineral-free, like distilled water. The process of reverse osmosis removes all kinds of unwanted impurities, salts and ions from water, making it fit for human consumption. Regular service and maintenance of RO keeps the hardness, pH and TDS under permissible limits.

“Effects of Impurities on Lead-Acid Batteries” ~ Trojan Battery
http://www.trojanbattery.com/pdf/WP_...ities_0612.pdf
__________________
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"



GordMay is offline   Reply With Quote
Old 21-01-2021, 12:09   #3
Moderator
 
Adelie's Avatar

Join Date: Feb 2010
Location: La Ciudad de la Misión Didacus de Alcalá en Alta California, Virreinato de Nueva España
Boat: Cal 20
Posts: 12,936
Re: Do It YOurself Distilled Water

Quote:
Originally Posted by Madehn View Post
So as i am installing my new watermaker--i got one of those "flashes" wither the result of hitting my head on the hatch- again or perhaps just a new idea - I would love to have a source of distilled water on board to service my bank of FLA batteries (no i dont want to change lets not turn this into a battery thread ). i am thinking that i can add a tap to my present system and install a DI filter cartridge in line with that tap and have a source of water for my batteries at a pretty minimal cost as i already have an extra set of filtration cannisters including a twin setup - one for carbon filter then one for DI filter- that way i never have to worry about finding/carrying distilled water for the batteries- for the number of gallons that i would need both the carbon and the DI filter should last for a LONG time. What am i missing, this seems too easy. Has anyone done this?


If you filter it’s not really distilled.

You want distilled heat water to make steam then run that they a cooling tube so it condenses.
__________________
Num Me Vexo?
A house is but a boat so poorly built and so firmly run aground no one would think to try and refloat it.
Adelie is online now   Reply With Quote
Old 21-01-2021, 12:12   #4
S/V rubber ducky
 
sailorboy1's Avatar

Join Date: Jul 2007
Location: Bahamas cruising currently
Boat: Hunter 410
Posts: 17,637
Re: Do It YOurself Distilled Water

I used a DI filter to make battery water for years. It made 3 ppm tds water out of tap water.
__________________
jobless, houseless, clueless, living on a boat and cruising around somewhere
sailorboy1 is offline   Reply With Quote
Old 21-01-2021, 12:20   #5
Writing Full-Time Since 2014
 
thinwater's Avatar

Join Date: Nov 2008
Location: Deale, MD
Boat: PDQ Altair, 32/34
Posts: 7,802
Re: Do It YOurself Distilled Water

The challenge is that the battery water spec is 5ppm chloride, and seawater RO water TDS is largely chloride. This is considerably more difficult than starting with typical tap water, but doable.


You can also get suitable water by carefully collecting rainwater. Also dehumidifier condensate.
__________________
Gear Testing--Engineering--Sailing
https://sail-delmarva.blogspot.com/
thinwater is offline   Reply With Quote
Old 21-01-2021, 12:55   #6
Registered User

Join Date: Jun 2019
Location: Bay of Islands New Zealand
Boat: Morgan 44 CC
Posts: 1,023
Re: Do It YOurself Distilled Water

Quote:
Originally Posted by thinwater View Post
The challenge is that the battery water spec is 5ppm chloride, and seawater RO water TDS is largely chloride. This is considerably more difficult than starting with typical tap water, but doable.


You can also get suitable water by carefully collecting rainwater. Also dehumidifier condensate.
That’s what I use mostly - dehumidifier condensate. My watermaker water generally has 250ppm which I don’t think is clean enough for my batteries. The condensate off my dehumidifier reads less than 75ppm and on a humid day I get up to 10litres in 24 hours.

In a pinch I take water off the watermaker after a 10 minute fresh water flush - ppm can easily drop below 100.
CassidyNZ is offline   Reply With Quote
Old 21-01-2021, 13:20   #7
Writing Full-Time Since 2014
 
thinwater's Avatar

Join Date: Nov 2008
Location: Deale, MD
Boat: PDQ Altair, 32/34
Posts: 7,802
Re: Do It YOurself Distilled Water

Quote:
Originally Posted by CassidyNZ View Post
That’s what I use mostly - dehumidifier condensate. My watermaker water generally has 250ppm which I don’t think is clean enough for my batteries. The condensate off my dehumidifier reads less than 75ppm and on a humid day I get up to 10litres in 24 hours.

In a pinch I take water off the watermaker after a 10 minute fresh water flush - ppm can easily drop below 100.

Battery water is NOT as simple as TDS. Chloride is much more harmful than calcium or carbonate, for example. The dehumidifier water will contain different ions than seawater RO water, which is nearly all NaCl. The seawater RO, on a good day, is most likely 10 times the limit, and is more typically 20-40 times the limit. Ordinary tap water is probably several times better (and still is bad).


75 TDS is quite high for a dehumidifier. 20s is more typical, so I'm guessing the chloride in the dehumidifier is probably too high. Rainwater should be ~ 10 ppm TDS.
__________________
Gear Testing--Engineering--Sailing
https://sail-delmarva.blogspot.com/
thinwater is offline   Reply With Quote
Old 21-01-2021, 13:30   #8
Senior Cruiser
 
GordMay's Avatar

Cruisers Forum Supporter

Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 40,335
Images: 241
Re: Do It YOurself Distilled Water

The previously linked, Trojan Battery White Paper, “Effects of Impurities on Lead-Acid Batteries”, includes Table 1, “Recommended Maximum Allowable Impurities in Water for Battery Use”. No need to guess, what’s acceptable.
Here ➥ http://www.trojanbattery.com/pdf/WP_...ities_0612.pdf
__________________
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"



GordMay is offline   Reply With Quote
Old 21-01-2021, 13:35   #9
Registered User

Join Date: Jun 2019
Location: Bay of Islands New Zealand
Boat: Morgan 44 CC
Posts: 1,023
Re: Do It YOurself Distilled Water

Quote:
Originally Posted by thinwater View Post
Battery water is NOT as simple as TDS. Chloride is much more harmful than calcium or carbonate, for example. The dehumidifier water will contain different ions than seawater RO water, which is nearly all NaCl. The seawater RO, on a good day, is most likely 10 times the limit, and is more typically 20-40 times the limit. Ordinary tap water is probably several times better (and still is bad).


75 TDS is quite high for a dehumidifier. 20s is more typical, so I'm guessing the chloride in the dehumidifier is probably too high. Rainwater should be ~ 10 ppm TDS.
When you say “tap water”, are you talking if municipal water? Because municipal tap water in our local town is chlorinated to a point where it smells of the stuff. Surely chlorine in batteries is not clever.

In my homes (past 3) we live on rain water. I must test again one day because IIRC our water is up around 50 or 60ppm, can’t remember it ever being anywhere near 10. Perhaps that has something to to do with our roofing.

How does one eliminate/reduce chloride in dehumidifier condensate? How do you even test for it? Maybe the condensate I use is no good for my batteries. Although I used it exclusively in my last bank which lasted nearly 10 years and included two or three “run dry abuses”.
CassidyNZ is offline   Reply With Quote
Old 21-01-2021, 16:12   #10
Registered User
 
Madehn's Avatar

Join Date: Nov 2014
Location: Kemah Tx
Boat: Gulfstar 51
Posts: 280
Re: Do It YOurself Distilled Water

Thanks for all of the replies- from reading Gord's article and Sailorboy1's response i am thinking that running my RO water through a DI filter cartridge should give me water suitable for my batteries. Thanks to all.
Madehn is offline   Reply With Quote
Old 22-01-2021, 02:42   #11
Sponsoring Vendor
 
Tellie's Avatar

Community Sponsor

Join Date: Oct 2007
Location: Hollywood, Fl.
Boat: FP Athena 38' Poerava
Posts: 3,579
Re: Do It YOurself Distilled Water

Shirly, it's much easier to store a gallon of distilled water on your boat.
Tellie is offline   Reply With Quote
Old 22-01-2021, 09:35   #12
Registered User

Join Date: Feb 2012
Location: SF Bay Area
Boat: Freedom 28 Cat Ketch
Posts: 100
Re: Do It YOurself Distilled Water

Quote:
Originally Posted by Tellie View Post
Shirly, it's much easier to store a gallon of distilled water on your boat.


My late dad would haunt me if I let that one pass. Happy Friday!
Jdeuel is offline   Reply With Quote
Old 22-01-2021, 10:51   #13
Registered User

Join Date: Jul 2020
Location: Coastal Maine
Boat: Quickstep 24
Posts: 27
Re: Do It YOurself Distilled Water

Quote:
Originally Posted by thinwater View Post
The challenge is that the battery water spec is 5ppm chloride, and seawater RO water TDS is largely chloride. This is considerably more difficult than starting with typical tap water, but doable.


You can also get suitable water by carefully collecting rainwater. Also dehumidifier condensate.
I'd be careful with "just rainwater". It travels thru the atmosphere, which these days can be loaded with lots of particulate matter not to mention the thought of "acid rain".
Dehumidifiers collect their condensation on cold pipes -- what are the pipes made of? Can they pass metallic 'stuff' along to the water? Like copper corrosion. And they need cleaning from time to time because they collect 'stuff' from the air too.

Why not go to local grocery store and buy a gallon of "distilled water"?
RiverRat37 is offline   Reply With Quote
Old 22-01-2021, 11:47   #14
Registered User
 
bailsout's Avatar

Join Date: May 2013
Location: Morro Bay, CA
Boat: Herreshoff 28 modified ketch- wood
Posts: 302
Re: Do It YOurself Distilled Water

I don’t see the downside to carrying a bottle of distilled water. Just in case something happens to your primary water system you have back up.
bailsout is offline   Reply With Quote
Old 22-01-2021, 12:33   #15
S/V rubber ducky
 
sailorboy1's Avatar

Join Date: Jul 2007
Location: Bahamas cruising currently
Boat: Hunter 410
Posts: 17,637
Re: Do It YOurself Distilled Water

Quote:
Originally Posted by Tellie View Post
Shirly, it's much easier to store a gallon of distilled water on your boat.
I found that Shirley had a hard time finding distilled water when needed
__________________
jobless, houseless, clueless, living on a boat and cruising around somewhere
sailorboy1 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
Battery Water; Distilled Drinking Water vs. Deionized Battery Water ErikFinn Electrical: Batteries, Generators & Solar 42 18-09-2019 00:27
distilled water cooling how long? er9 Engines and Propulsion Systems 13 16-06-2019 18:39
Rain vs RO vs distilled water rwells36 Electrical: Batteries, Generators & Solar 20 09-06-2017 07:24
Adding distilled water to batteries GalaxyGirl Powered Boats 22 22-07-2014 17:30
distilled water beau Provisioning: Food & Drink 2 19-02-2007 15:55

Advertise Here


All times are GMT -7. The time now is 00:50.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.