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Old 16-09-2019, 08:12   #1
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watermakers

Looking to install a water maker on board, I have read and seen displays at shows for most of them even Practical Sailor had an article about the most used water makers but that was from 2005, since then other manufacturers have entered the field. I think that Spectra is the favorite with world racers, but I'm just a cruiser. I have been reading about the Railman/Sea Task water maker, any experiences with the system or recommendations of others.
I intend to do the installation my self as with all the equipment on my boat. Normal crew on the boat is my wife (admiral) myself and the trusted waterdog.
Thanks in advance
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Old 16-09-2019, 08:57   #2
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Re: watermakers

We have a Rainman V2 portable on our Beneteau 423 and a friend bought and installed a Rainman Naked in his FP Lipari catamaran. Both are the 120V high output models. I am very happy with our portable and will be installing this fall after using it in the Keys, Bahamas, Dominican Republic, Puerto Rico and the Virgin Islands. It is a game changer for us.

The Rainman is a manual watermaker. It does not have automated backflush and other complexities. We tend to 100+ gallons at a time at ~37gph and less than 200ppm TDS. I tend to pickle the watermaker after each use as we only use 50 gallons per week. We run ours off of a Honda EU2000i.

We were changing the particulate filter every 6 hours in Boot Key Harbor with lots of sediment. In the Virgin Islands where we had great water flow and clarity it was more like 20 hours. The filters are cheap and I have not tried to clean them.

SeaTask Group is a great company. We get email reminders about changing the pump oil after 50 hours. I have called with a question and had Chris the owner answer after 5PM and answer my question as well ask more detailed questions about how we are using the unit.

Would I buy this again? Yep. Best deal I could find. The manual nature is not a problem for us.

Cheers, RickG
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Old 16-09-2019, 09:33   #3
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watermakers

Generally two schools of thought on a watermaker.
Believe it or not but the decision generally revolves over whether or not you will have a generator, or at least how often you motor.

If you are determined to not have a generator, well then you want an extremely efficient power wise watermaker, that often means a Spectra, and thatís one reason you find them on race boats, cause power is precious and pressurizing water to a high PSI takes a lot of power, a Spectra recovers energy and therefore is extremely energy efficient. However this comes at a cost of course, as itís not just a simple pressure washer type of pump.

Now if your cruising plans include a generator, then you donít so much care about energy efficiency, but as you do want to likely reduce the hours you run the generator, you want a high output watermaker.
You can run a high output watermaker off of an inverter and a large alternator.
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Old 16-09-2019, 14:25   #4
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Re: watermakers

I have decided on a 110V Cruise RO system for our 47 ft. Cat. While we would likely have enough solar installed to go with a 12V unit, since we have a 13KW genset on board, the 110V model makes sense to me. I like that most of the Cruise RO parts are not proprietary and easily ( I know, a very relative term ) sourced. We carry roughly 175 gallons when full, so going with the HP 40 GPH model should more than cover our needs. Run the genset 3 to 4 hours at a time to fill up.
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Old 16-09-2019, 16:21   #5
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Re: watermakers

Quote:
Originally Posted by a64pilot View Post
Generally two schools of thought on a watermaker.
Believe it or not but the decision generally revolves over whether or not you will have a generator, or at least how often you motor.

If you are determined to not have a generator, well then you want an extremely efficient power wise watermaker, that often means a Spectra, and thatís one reason you find them on race boats, cause power is precious and pressurizing water to a high PSI takes a lot of power, a Spectra recovers energy and therefore is extremely energy efficient. However this comes at a cost of course, as itís not just a simple pressure washer type of pump.

Now if your cruising plans include a generator, then you donít so much care about energy efficiency, but as you do want to likely reduce the hours you run the generator, you want a high output watermaker.
You can run a high output watermaker off of an inverter and a large alternator.
I see this price argument stated fairly often about watermakers and AC vs Spectra units. The cost for the two typical units is not that different.
A 15 gph Spectra Cape Horn will cost you about usd$6,500.
A 20 gph CruiseRO unit will cost you about usd$4,400 plus $1,000 for a Honda 2000, usd$5,400.

That's a boat buck apart.
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Old 16-09-2019, 23:27   #6
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Re: watermakers

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Originally Posted by RickG View Post
The Rainman is a manual watermaker. It does not have automated backflush and other complexities.
While this is true, we are about to launch an autoflush option for those people that want a weekly flush cycle. It will be out before the 2019 Annapolis boat show in a few weeks and will be backward compatible for any installed Rainman systems.

It consists of a small timer that is one button programmable with a motorised valve. We had our pre-production version at the recent Sydney boat show and it was well received.
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Old 17-09-2019, 04:10   #7
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Re: watermakers

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Originally Posted by Rainman View Post
While this is true, we are about to launch an autoflush option for those people that want a weekly flush cycle. It will be out before the 2019 Annapolis boat show in a few weeks and will be backward compatible for any installed Rainman systems.

It consists of a small timer that is one button programmable with a motorised valve. We had our pre-production version at the recent Sydney boat show and it was well received.
Nice, weíll see you in Annapolis.

Cheers, RickG
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