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Go Back   SailNet Community > Out There > Cruising & Liveaboard Forum > Suggestions for Watermaker
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Topic Review (Newest First)
06-21-2012 05:16 PM
bvander66
Re: Suggestions for Watermaker

Quote:
Originally Posted by Brent Swain View Post
Go direct drive, with a V belt off the engine. Wolf said electric drive was the main source of problems with watermakers.
Great if you only want to make water when underway but otherwise your using main engine under a small load which is hard on it, as well not very efficient use of the expensive diesel. If you really want direct drive and do have a generator then look at coupling it to that, then you charge btys while making water.
In my research most watermaker problems were in order
-sensors for the fancy ones which have auto functions
-electronics for the auto controllers
-membranes from either not pickling or fuel contamination.
-HP pump from either corrosion or air intrusion.

A good quality electric motor (DC or AC) will perform and last well on a boat as long as its not in an overly wet environment (ie bilge).
06-21-2012 04:44 PM
Brent Swain
Re: Suggestions for Watermaker

Quote:
Originally Posted by bvander66 View Post
We worked with George at quality water works in NC and custom built our watermaker which uses common industrial components. Its a modular system which allowed us to scatter/fit in the components where they fit. George was great and his website shows good examples plus he will provide great diagrams and suggestions.
The big option is go with 12V system or a 120v system. A lot depends on if you have an onboard generator.
Go direct drive, with a V belt off the engine. Wolf said electric drive was the main source of problems with watermakers.
06-20-2012 10:07 PM
bvander66
Re: Suggestions for Watermaker

We worked with George at quality water works in NC and custom built our watermaker which uses common industrial components. Its a modular system which allowed us to scatter/fit in the components where they fit. George was great and his website shows good examples plus he will provide great diagrams and suggestions.
The big option is go with 12V system or a 120v system. A lot depends on if you have an onboard generator.
06-19-2012 08:19 PM
Dave Kiwi
Re: Suggestions for Watermaker

Southern Cross Marine Group in Auckland do locally made watermakers to spec. It's all about flushing out the system and maintaining the membranes - and don't forget the time and energy saved in not refilling tanks. A good quality pump and a good quality membrane with components you can get at it is what is required.
03-27-2012 07:28 PM
Brent Swain
Re: Suggestions for Watermaker

Check out wolfwatermakers.com .Wolf used his pressure washer pump in the South Pacific and its been running since 1998, no problems. He said they are far better built than the ones made for watermakers. Compare the wall thickness of sch 40 2 1/2 inch stainless pipe (.203 inches) with the wall thickness of most commercially made housings. They are flimsy by comparison. Home built watermakers are far more reliable than commercially made ones, as is the case with most home built gear.
The mere 24 inches of weld needed to build your own housing shouldn't cost much, if you cut out your own parts.
03-27-2012 03:48 PM
ncapener
Re: Suggestions for Watermaker

I bought and installed an Echotech water maker a year ago. I wanted a DC motor driven pump.
I also looked at buying the components and building my own. It sounds simple to get SS pipe from the scrap yard and weld up the pressure vessel if you are an experienced welder like Brent and have the equipment. Otherwise you spend time drawing out what you want , time on the road to find a shop that promises the part "next week" and a month later, you find another shop and the circle starts all over....
Also, if you are heading off shore and depend on your water maker, do you really trust the first one off the line????

Neal
03-15-2012 02:29 PM
misfits
Re: Suggestions for Watermaker

There was a very excellent 2 part article in Good Old Boat maybe a year, year & a half ago. The author went into great detail on how he put his engine driven watermaker together & it produced some serious water.

Bob
03-15-2012 01:47 PM
Brent Swain
Re: Suggestions for Watermaker

Any 3GPM presure washer pump with ceramic plungers will work , engine driven. Under $300 . A friend , in the watermaker business for many years , told me they are far more solidly built than the ones they make for watermakers. The mebrane housing can be welded up from 2 1/2 inch sch 40 stainless pipe from the scrapyard, $2 a pound. You do have to buy the mebrane and one pre filtre, as well as some hydraulic hoses and fittings. Watch them put the ends on the hydraulic hoses . Make sure they don't put a gob of grease on them, as some hydraulic shops like to do. That will kill your membrane.
$20 plus postage for my book will be one of the cheapest components. .
03-15-2012 01:39 PM
NCTim
Re: Suggestions for Watermaker

Check out Cruise RO Water and Power's watermakers. I am installing one now. It is very similar in design to the one in the article that was suggested in this posting. I am impressed with the quality of the materials and instructions that came with the kit.
03-15-2012 12:54 PM
ebs001
Re: Suggestions for Watermaker

I don't know if this will work for you but it seems the best deal around. WaterMakers
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