Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 19-02-2015, 19:05   #16
Registered User

Join Date: May 2012
Location: Central California
Boat: Catalina 30
Posts: 873
Re: Water maker versus catching rain

If you have cooking fuel, fresh water can easily
be made from saltwater. As simple as taking
the condensate from a pot lid and cooling the
lid back down over and over. Or a crude still
can be made from a pressure cooker and some
copper tubing. Run the coil through seawater
in the sink for cooling.

Creativity is the answer.

I remember a story of a man and his son who
ran out of water in 1991 and were licking the
headliner for moisture.
__________________

__________________
Bill
...........................................
You can't buy happiness, but you can buy ribeye.
jongleur is offline   Reply With Quote
Old 20-02-2015, 00:15   #17
Marine Service Provider
 
NornaBiron's Avatar

Join Date: Feb 2009
Location: Greece
Boat: Custom steel cutter, 15m
Posts: 644
Re: Water maker versus catching rain

Quote:
Originally Posted by jongleur View Post
If you have cooking fuel, fresh water can easily
be made from saltwater. As simple as taking
the condensate from a pot lid and cooling the
lid back down over and over. Or a crude still
can be made from a pressure cooker and some
copper tubing. Run the coil through seawater
in the sink for cooling.

Creativity is the answer.

I remember a story of a man and his son who
ran out of water in 1991 and were licking the
headliner for moisture.
Extreme measures - I'd rather catch rain or run a watermaker. You'd probably use tons of propane to produce a cup of potable water.
__________________

__________________
Sail repairs by cruisers for cruisers
NornaBiron is offline   Reply With Quote
Old 20-02-2015, 12:36   #18
Registered User
 
Cadence's Avatar

Join Date: Dec 2008
Location: SC
Boat: None,build the one shown of glass, had many from 6' to 48'.
Posts: 6,051
Re: Water maker versus catching rain

It may sound like a dumb question? If not at anchor how salt free is the water being caught just given normal spray in only moderate seas?
__________________
Cadence is offline   Reply With Quote
Old 20-02-2015, 13:53   #19
Moderator
 
JPA Cate's Avatar

Join Date: Nov 2011
Location: aboard, cruising in Australia
Boat: Sayer 46' Solent rig sloop
Posts: 10,655
Re: Water maker versus catching rain

Quote:
Originally Posted by RDW View Post
I have a 46 foot sloop with 150 gal of water tanks (3). I plan to do the World ARC. My boat had a water maker that has given up the ghost. Previous owner used it. I think I have read that boats with water makers used 7 liters per person per day while boats without did well with 3 liters pppd ( recent world arc) I can easily see that having a water maker would be nice. I can also see that it is one more thing to maintain. I have a large shade cloth that I am tempted to adapt to catching rain water.
Anybody done both?
Thoughts?
RDW
Yes, we did both, but on a smaller scale, water-maker wise. It was only a small Power Survivor, that had a big handle for manual operation, working on the batteries, it actually would make a bit over 4 liters/hr. We used it at sea, where the water is relatively clean, and pickled it before going in port. The boat had only two 25 gallon tanks, and the watermaker was plumbed into the port settee tank.

We had a loose-footed mainsail that we put a through hull fitting into, so we could catch rain water under way, as well as converting our cockpit awning for rain catchment. Our usage was roughly 1/2 gal per person per day. We used a sun shower for our showers, and they are easy to use frugally, used salt water to pre-wash our dishes. Lived on that boat for 18 yrs.

In addition, we carried a 5 gallon jug "for emergencies", but never ran out of water.

We never have had a problem with water going foul, but were always careful to use household bleach to kill possible contaminants. I agree with Steady Hand, that foul water could be a serious problem, another CF member (Boatman 61) had such a problem on a cross Atlantic delivery of a vessel from Florida. You would be well advised, to flush your whole system with a strong bleach solution, even the vent lines, and start fresh. weavis has posted somewhere here a complete description of how to do it. 1 Tbsp to 10 gal is enough to prevent bad stuff growing if you start with clean tanks. We then ran it through a charcoal filter to remove the chlorine.

Ann
__________________
Ann, with Jim, aboard US s/v Insatiable II, in Oz, very long term cruisers
JPA Cate is online now   Reply With Quote
Old 20-02-2015, 13:56   #20
Marine Service Provider
 
SV THIRD DAY's Avatar

Cruisers Forum Supporter

Join Date: Aug 2006
Location: La Paz, Mexico
Boat: 1978 Hudson Force 50 Ketch
Posts: 3,653
Re: Water maker versus catching rain

Quote:
Originally Posted by roverhi View Post
Don't water makers need to be used regularly or 'pickled' if they aren't. That would seem to be a bit of a hassle and possibly expensive replacing membranes if you didn't use enough water.
Many of the "water makers are hard to maintain" stories come from the first generation systems that were installed in boats without easy ways to introduce pickling reagent or do a fresh water flush. So the old units were a PITA.....but that was then when cruisers still learned how to use a Sextant.

Modern water makers almost all have an easy "turn the valve" fresh water flush option that you can do every 5-7 days or that process can be automated for those that don't want to mess with remembering.

Pickling is probably one of the most hyped and scary sounding things until you realize that all pickling does is pull a preservative into the system to kill bacteria and biological growth. It's not rocket science and takes maybe 5 minutes to do if you are going to leave the boat or not use your water maker for weeks or months.

I can list lots of boat systems that I think are harder to run and maintain than one of today's modern water makers. Add in the benefit of fresh water desk rinse downs, showers when you want...and baby...it's Cruising and not Camping when you have a water maker.
__________________
Rich Boren Goodbye Morro Bay...Hello La Paz, Mexico and the owner of:
Cruise RO Water High Output Water
Technautic CoolBlue Refrigeration
SV THIRD DAY is offline   Reply With Quote
Old 20-02-2015, 14:12   #21
Moderator
 
JPA Cate's Avatar

Join Date: Nov 2011
Location: aboard, cruising in Australia
Boat: Sayer 46' Solent rig sloop
Posts: 10,655
Re: Water maker versus catching rain

Rich,

I never felt like I was camping on our first Insatiable. YMMV, and so may the OP's.

Ann
__________________
Ann, with Jim, aboard US s/v Insatiable II, in Oz, very long term cruisers
JPA Cate is online now   Reply With Quote
Old 20-02-2015, 14:14   #22
RDW
Registered User

Join Date: Dec 2009
Location: Lexington, Kentucky
Boat: Morris 1996 46' Lexington
Posts: 378
Re: Water maker versus catching rain

Quote:
Originally Posted by Cadence View Post
It may sound like a dumb question? If not at anchor how salt free is the water being caught just given normal spray in only moderate seas?
I have never done it but you would let it rain and rinse off for several minutes before starting to collect. If you were taking it off the main sail, less rinsing.
rdw
__________________
RDW is offline   Reply With Quote
Old 20-02-2015, 14:16   #23
Marine Service Provider
 
SV THIRD DAY's Avatar

Cruisers Forum Supporter

Join Date: Aug 2006
Location: La Paz, Mexico
Boat: 1978 Hudson Force 50 Ketch
Posts: 3,653
Re: Water maker versus catching rain

That's the beauty of having freedom and options.
We wouldn't have lasted a year without a water maker in Mexico and the Sea of Cortez where I was known to take 3 showers a day when I was hot...because I could....

I gave a water maker presentation at the Miami Boat Show and Here's a copy of my first Slide:

Do You Need a Water Maker
to go Cruising?
Of course Not!
You also don’t
Need:
Refrigeration, Chart Plotter, Radar, Fast RIB Dinghy, Ipad, WiFi Antenna, DVD Players, Espresso and Soda stream Machines
BUT…..
__________________
Rich Boren Goodbye Morro Bay...Hello La Paz, Mexico and the owner of:
Cruise RO Water High Output Water
Technautic CoolBlue Refrigeration
SV THIRD DAY is offline   Reply With Quote
Old 20-02-2015, 16:30   #24
Registered User
 
Cadence's Avatar

Join Date: Dec 2008
Location: SC
Boat: None,build the one shown of glass, had many from 6' to 48'.
Posts: 6,051
Re: Water maker versus catching rain

Just out of curiousity, Is a water maker similar to the system I had on my well. I believe they called it a resin exchange system. I had to put salt into it for a back flush. ???
__________________
Cadence is offline   Reply With Quote
Old 20-02-2015, 16:45   #25
Marine Service Provider
 
SV THIRD DAY's Avatar

Cruisers Forum Supporter

Join Date: Aug 2006
Location: La Paz, Mexico
Boat: 1978 Hudson Force 50 Ketch
Posts: 3,653
Re: Water maker versus catching rain

Quote:
Originally Posted by Cadence View Post
Just out of curiousity, Is a water maker similar to the system I had on my well. I believe they called it a resin exchange system. I had to put salt into it for a back flush. ???
The resin exchange system is capturing the ions as they flow past, where the RO Membrane passes fresh water molecules through the surface of the membrane while rejecting 99.4% of the salt, which is carried away by the brine stream. The brine is a fancy words just meaning the rejected sea water flow that is now more "salty".

Here is a good video that shows how a RO Membrane is made and how they work.


I have some videos on my site that are also worth watching as general educational videos on RO. Not a lot of "sales hype" just good information.
Watermaker How-To Videos | Cruise RO Water & Power
__________________
Rich Boren Goodbye Morro Bay...Hello La Paz, Mexico and the owner of:
Cruise RO Water High Output Water
Technautic CoolBlue Refrigeration
SV THIRD DAY is offline   Reply With Quote
Old 20-02-2015, 16:57   #26
Registered User
 
Ironman162's Avatar

Join Date: Oct 2012
Location: Sydney Harbour
Boat: Coronet Oceanfarer30
Posts: 157
Re: Water maker versus catching rain

I can feel your experience and also had similar. It's the psychological aspect that got us down too.
Can only agree with you and feel lucky we all made it albeit only just!
__________________
Ironman162 is offline   Reply With Quote
Old 20-02-2015, 16:59   #27
Registered User
 
Cadence's Avatar

Join Date: Dec 2008
Location: SC
Boat: None,build the one shown of glass, had many from 6' to 48'.
Posts: 6,051
Re: Water maker versus catching rain

Quote:
Originally Posted by SV THIRD DAY View Post
The resin exchange system is capturing the ions as they flow past, where the RO Membrane passes fresh water molecules through the surface of the membrane while rejecting 99.4% of the salt, which is carried away by the brine stream. The brine is a fancy words just meaning the rejected sea water flow that is now more "salty".

Here is a good video that shows how a RO Membrane is made and how they work.


I have some videos on my site that are also worth watching as general educational videos on RO. Not a lot of "sales hype" just good information.
Watermaker How-To Videos | Cruise RO Water & Power
So I guess the answer is yes or similar. Just down sized and you don't need to buy salt. I'll watch the video tomorrow.
__________________
Cadence is offline   Reply With Quote
Old 20-02-2015, 17:13   #28
Registered User

Join Date: Mar 2013
Location: Annapolis, MD
Boat: Sail any boats from 28 to 60 ft
Posts: 530
Re: Water maker versus catching rain

Quote:
Originally Posted by newhaul View Post
A catchment trough on the boom to catch rain off mainsail seems to be the best way to catch rain while underway
Quote:
Originally Posted by a64pilot View Post
I have a Profurl in boom furling system, just by it's design it catches all the water coming off the main and funnels it to the mast where it pours out, I've thought to use it for a rain catchment, but wondered how effective it would be.
Have you used a catchment system like you describe?
I would like to see how the catchment system looks like or constructed.
__________________
rockDAWG is offline   Reply With Quote
Old 20-02-2015, 17:32   #29
Registered User

Join Date: May 2012
Location: Central California
Boat: Catalina 30
Posts: 873
Re: Water maker versus catching rain

You'd probably use tons of propane to produce a cup of potable water.

True, but it would have alleviated the suffering
reported by Stead Hand in this thread.

After using up the propane, one could cannibalize
the woodwork for fuel.

Anyway, don't die of thirst.
__________________
Bill
...........................................
You can't buy happiness, but you can buy ribeye.
jongleur is offline   Reply With Quote
Old 20-02-2015, 17:51   #30
Registered User

Join Date: Mar 2013
Location: Annapolis, MD
Boat: Sail any boats from 28 to 60 ft
Posts: 530
Re: Water maker versus catching rain

Quote:
Originally Posted by Cadence View Post
Just out of curiousity, Is a water maker similar to the system I had on my well. I believe they called it a resin exchange system. I had to put salt into it for a back flush. ???
The one you have in you house is a water softener. Water maker is totally difference from a water softener.
__________________

__________________
rockDAWG is offline   Reply With Quote
Reply

Tags
water

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
Boston Whaler versus Albury versus ??? Magor Powered Boats 3 26-02-2014 12:43
water catching canvas thingy rebel heart Construction, Maintenance & Refit 11 28-12-2011 09:29
Catching Fish alexleclainche Families, Kids and Pets Afloat 54 05-12-2009 12:19



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 19:54.


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.