Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 18-04-2014, 13:11   #1
Registered User
 
SV Windrush II's Avatar

Join Date: Dec 2013
Location: Somewhere in the Philippines
Boat: Mariner 40 Ketch
Posts: 452
Images: 18
Anyone Tried Making your own Watermaker?

I was reading this article about how to make your own watermaker and seams pretty straight forward. Has anyone tried this? if so, how successful was it?

http://www.westward-ii.com/PDF%27s/H...watermaker.pdf
__________________

__________________
Mariner 40 Ketch
SV Windrush II is offline   Reply With Quote
Old 18-04-2014, 13:34   #2
Registered User

Join Date: Feb 2013
Location: NH
Boat: sabre 28
Posts: 127
Re: Anyone tried making your own watermaker?

There was a 2 part article in Good Old Boat about 3 years ago for a do it yourself watermaker using OTC parts. May be worth looking up.

Bob
__________________

__________________
misfits is offline   Reply With Quote
Old 18-04-2014, 14:09   #3
cruiser

Join Date: May 2010
Location: SF Bay Area; Former Annapolis and MA Liveaboard.
Boat: Looking and saving for my next...mid-atlantic coast
Posts: 6,197
Re: Anyone tried making your own watermaker?

Be aware:

The Limitations of Water Filters and Water Purification | Section Hikers Backpacking Blog
Water Purification

It might not be the same for sailing situations, but I would consider additional "purifier" if you want to be extra careful
__________________
SaltyMonkey is offline   Reply With Quote
Old 18-04-2014, 14:29   #4
Registered User
 
Zanshin's Avatar

Join Date: Feb 2007
Location: Caribbean
Boat: Jeanneau 57
Posts: 1,621
Re: Anyone tried making your own watermaker?

That link to water purification is somewhat disingenuous and doesn't apply to water made by reverse osmosis watermakers at all.

Watermaker particle size filtration goes down further than bacteria size, down to between 0.0001 and 0.001 microns. See Particle Size Chart for an example. This particle size is smaller than the Hep A, rotavirus and Norwalk virus mentioned in the article.

In addition, the rotavirus transmission is from unsanitary conditions and infected feces. While it survives a long time in fresh water, salt water is a different matter altogether.
While Hep A can be present in salt water, it's diameter of 0.027 microns is much larger than the particle size that any watermaker lets through.
The Norwalk Virus (more correctly, the Norovirus) is 0.038, so almost 4 times larger than the largest particles that go through a watermaker.

The water coming out of a reverse osmosis watermaker is about as pure as you can get outside of a lab. Contamination might come from the tank and tubing - but certainly none of those nasty viruses will come from your on-board water.
__________________
-Zanshin (SV Zanshin)
Zanshin is offline   Reply With Quote
Old 18-04-2014, 19:25   #5
Senior Cruiser
 
s/v Beth's Avatar

Cruisers Forum Supporter

Join Date: Oct 2008
Location: Coos Bay, Oregon
Boat: Valiant 40 (1975)
Posts: 4,066
Re: Anyone tried making your own watermaker?

I would like to make one that is operated by your feet. The legs are much more powerful than the arms, yet any compact one I see out there is powered by the arms.
Also, I have a R/O system under my sink that only uses water pressure. Just 60 psi, yet I get tasteless water from it, and it drains just like a R/O system should.
Am I getting fooled? Because most of these R/O systems say you need this incredible pressure to produce water.
__________________
s/v Beth is offline   Reply With Quote
Old 18-04-2014, 19:46   #6
Registered User

Join Date: Aug 2012
Location: Cruising the Gulf of Mexico.
Boat: 1980 Morgan 415
Posts: 1,439
Re: Anyone tried making your own watermaker?

Evaporation at less than 1 bar utilizing waste engine heat will eventually make it to the small boat world.

Build it and we will come.
__________________
Working on spending my children's inheritance.
Cap Erict3 is offline   Reply With Quote
Old 18-04-2014, 19:51   #7
Registered User

Join Date: Jul 2013
Location: San Diego, CA
Posts: 3,157
Re: Anyone tried making your own watermaker?

Quote:
Originally Posted by s/v Beth View Post
I would like to make one that is operated by your feet. The legs are much more powerful than the arms, yet any compact one I see out there is powered by the arms.
Also, I have a R/O system under my sink that only uses water pressure. Just 60 psi, yet I get tasteless water from it, and it drains just like a R/O system should.
Am I getting fooled? Because most of these R/O systems say you need this incredible pressure to produce water.
I asked myself the same question. Maybe it's a matter of higher pressure = greater volume of water. I know my 60 psi system at home only makes like 10 or 15 gal/day, while these high pressure ones make that in an hour or less.

I'd like to have an RO system powered by a stairstepper. Get your exercise while making water!
__________________
socaldmax is offline   Reply With Quote
Old 18-04-2014, 20:11   #8
Registered User
 
SV Windrush II's Avatar

Join Date: Dec 2013
Location: Somewhere in the Philippines
Boat: Mariner 40 Ketch
Posts: 452
Images: 18
Re: Anyone tried making your own watermaker?

Hummmm, ok I will design a foot powered concept and post it later. You guys can help me brainstorm. I think if I connected a bicycle machine to a reduction gearbox that is mounted on the pump then the person could crank up the RPMs. It could even have a flywheel like a exercise bike so that you could keep up the momentum.

I am also thinking of the same thing to run a small generator to charge the batteries. So you could have a lever to switch from watermaker to charger
__________________
Mariner 40 Ketch
SV Windrush II is offline   Reply With Quote
Old 18-04-2014, 20:23   #9
Senior Cruiser
 
s/v Beth's Avatar

Cruisers Forum Supporter

Join Date: Oct 2008
Location: Coos Bay, Oregon
Boat: Valiant 40 (1975)
Posts: 4,066
Re: Anyone tried making your own watermaker?

A bike is kinda boring and cumbersome (Ha! from someone who made bikes for a few years!) I have seen a stair stepper however that is 10 by 14 inches and easily portable. What if we could attach one of those to a flywheel and power up our water maker/or generator.
__________________
s/v Beth is offline   Reply With Quote
Old 18-04-2014, 20:34   #10
Registered User
 
SV Windrush II's Avatar

Join Date: Dec 2013
Location: Somewhere in the Philippines
Boat: Mariner 40 Ketch
Posts: 452
Images: 18
Re: Anyone tried making your own watermaker?

Quote:
Originally Posted by s/v Beth View Post
A bike is kinda boring and cumbersome (Ha! from someone who made bikes for a few years!) I have seen a stair stepper however that is 10 by 14 inches and easily portable. What if we could attach one of those to a flywheel and power up our water maker/or generator.
Newt, can you post a link or pic? I will also do some research on compact stair steppers.

Sent from my SGH-T999L using Cruisers Sailing Forum mobile app
__________________
Mariner 40 Ketch
SV Windrush II is offline   Reply With Quote
Old 18-04-2014, 20:46   #11
Moderator
 
a64pilot's Avatar

Cruisers Forum Supporter

Join Date: Oct 2013
Location: Albany Ga.
Boat: Island Packet 38
Posts: 17,068
Re: Anyone tried making your own watermaker?

Look up how few watts a human can make and you'll be surprised
__________________
a64pilot is online now   Reply With Quote
Old 18-04-2014, 20:52   #12
Registered User
 
motaman9's Avatar

Join Date: Mar 2011
Posts: 151
Re: Anyone tried making your own watermaker?

The boat we recently bought has a "home made" water maker.....it seems to work more reliably and more productively than any mass produced one I have seen.....for what that's worth....
__________________
motaman9 is offline   Reply With Quote
Old 18-04-2014, 20:52   #13
cruiser

Join Date: May 2010
Location: SF Bay Area; Former Annapolis and MA Liveaboard.
Boat: Looking and saving for my next...mid-atlantic coast
Posts: 6,197
Re: Anyone tried making your own watermaker?

Quote:
Originally Posted by Zanshin View Post
Watermaker particle size filtration goes down further than bacteria size, down to between 0.0001 and 0.001 microns. See Particle Size Chart for an example. This particle size is smaller than the Hep A, rotavirus and Norwalk virus mentioned in the article.
Thanks Zanshin!
__________________
SaltyMonkey is offline   Reply With Quote
Old 18-04-2014, 21:20   #14
Senior Cruiser
 
StuM's Avatar

Cruisers Forum Supporter

Join Date: Nov 2013
Location: Port Moresby,Papua New Guinea
Boat: FP Belize Maestro 43
Posts: 6,714
Re: Anyone tried making your own watermaker?

Quote:
Originally Posted by a64pilot View Post
Look up how few watts a human can make and you'll be surprised
A top pro cyclist can sustain around 300 watts (5 or 6 times as much in a short burst). Figure your average sailing cruiser would be lucky to do 1/3 of that for any reasonable length of time. So about 8 amps @12v

That might be enoough for a low powered watermaker making around 10 l/hr (Half of which would possibly go in replacing what you sweated out making it! )
__________________
StuM is offline   Reply With Quote
Old 18-04-2014, 21:27   #15
Registered User
 
SV Windrush II's Avatar

Join Date: Dec 2013
Location: Somewhere in the Philippines
Boat: Mariner 40 Ketch
Posts: 452
Images: 18
Re: Anyone tried making your own watermaker?

Quote:
Originally Posted by StuM View Post
A top pro cyclist can sustain around 300 watts (5 or 6 times as much in a short burst). Figure your average sailing cruiser would be lucky to do 1/3 of that for any reasonable length of time. So about 8 amps @12v

That might be enoough for a low powered watermaker making around 10 l/hr (Half of which would possibly go in replacing what you sweated out making it! )
Hahaha, but just think how fit you would be after an ocean crossing

Sent from my SGH-T999L using Cruisers Sailing Forum mobile app
__________________

__________________
Mariner 40 Ketch
SV Windrush II is offline   Reply With Quote
Reply

Tags
water, watermaker

Thread Tools
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
For Sale: VHS: MAKING YOUR OWN EYE SPLICES silversailor Classifieds Archive 0 16-09-2013 14:45
Making Your Own Rugs. gmcairns Liveaboard's Forum 0 15-03-2012 10:06
Making Your Own Cradle k8ekotzel Monohull Sailboats 9 17-12-2011 11:30
Making Your Own Deadeyes boat_alexandra Deck hardware: Rigging, Sails & Hoisting 26 07-03-2011 14:45
Making Your Own Soft Shackles boat_alexandra Deck hardware: Rigging, Sails & Hoisting 12 31-01-2011 18:48



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 21:12.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.