Realistic sized desalinator (water-maker)

[newhaul]

Originally Posted by coopec43

I've got a vegetable garden, pot plants and mowed lawns where I live (but I don't intend having them on the yacht). I use scheme water in the toilet at home but at sea I'll either piddle over the side or use sea water to flush.

ok now we are getting somewhere . With what you have listed I would say use 1/3 of your current water usage as a base point . And work from there .

[newhaul]

Now on the Roberts Mauritius 43 you have plenty of room to mount a watermaker whenever you are ready to it doesn't need to be installed during the build and actually I would recommend not installing it until just prior to starting to use it.
For maintenance and lifecycle reasons

[Zai]

Originally Posted by coopec43

Would that unit run off the motor or can they realistically be battery powered? (this is all new to me)


Clive

My system is 12 volt and the one pump draws 15 amps, so with t

[Zai]

Originally Posted by coopec43

Would that unit run off the motor or can they realistically be battery powered? (this is all new to me)


Clive

My system is 12 volt and the one pump draws 15 amps, so with two pumps it would take 30 amps.

[mikedefieslife]

Originally Posted by Zai

My system is 12 volt and the one pump draws 15 amps, so with t

Which system do you have? What 12v electric motor or pump is it using?

[Zai]

I have a Purewater Whisper 30.
Don't know the brand of pump but it is a centrifugal pump.
The specs say 20 amps but I measure it quite often and have never seen it draw more than 15 amps.

[coopec43]

Originally Posted by Quadrille in JB

+1
I’ve used a SeawaterPro desalinator for over a year with great results. 20 gph with 1 membrane or 30 gph with the optional membrane. Both setups use under 10 amps @ 120vac. I ordered the water cooled pressure pump for an extra $100 and the optional seawater pump. All, including shipping and tax for under $2000. This is sold as an easily installed diy kit. Every fitting and hose is furnished and numbered.
We run it for an hour each day on our 2000 watt Kisae inverter powered by our 800 ah agm battery bank and 2 - 360 w sunpower PV panels. We rinse off every time we come out of the water and my wife likes a warm shower to wash her long hair each evening.

From what other people have posted on this thread this sounds like a very interesting option. Around 80 lph for a price of around $US2000: you can't beat that!

I like the fact it can run it off the battery bank although I am just doubling my battery bank to 600 ah. (My inverter should handle it as it is pure sine 3000/6000W)

I've book-marked the article for future reference and will be watching the video later this evening

Thank you

Clive

[Milko Berben]

Originally Posted by GeneM

Are you at all concerned about the PH of drinking water? I hear it's quite acidic unless treated.

Here in The Gambia the water is also very acidic the whole population drinks it untreated and there are no health complaints related to the water.


Then again Coca Cola is also very acidic.

[Zai]

We add a touch of Himalayan sea salt to the water we drink.

[coopec43]

Originally Posted by Cpt Mark

As an alternative you might check this guy out. His units start at $1600. Produces 21 GPH. Essentially the same as the DIY drawing above except he's sourced all the pieces for you.

https://seawaterpro.com

How much water do you need? .

I looked at the video of the unit being assembled and it is just so easy to follow having everything numbered. I am tremendously impressed!

They sell on eBay for $2200 AU plus postage $200. So easy!! (I will have to work out where to put it though)

How much water do I need? If I can manage it I don't want to have to ration it, I don't want to worry about it.......

Thanks

Clive

[Quadrille in JB]

Originally Posted by alctel

Could ya post your installation? I got the kit almost a year ago and still haven't installed it yet - I can't find space for the K2 water pressure pump or a way to mount it securely, and the same with the water filters. It's a pretty large unit.

After you remove the extraneous parts from the K2 pump, this unit, due to its modular design is much more compact than most comparable units. You can make the K2 a lot smaller by removing the wheels, storage basket, and handle, these are not needed. Just remove the screws and pull these extraneous parts off. The K2 pressure cleaner is available all over the world for ~$200 US. All of the parts used in the Seawaterpro are available off the shelf. Last year I saw the K2 pump in a Norwegian hardware store. None of the parts are proprietary.

Here are the pics that I have. I placed the K2 pump vertically next to my water heater and strapped it to the water heater with a ratcheting strap. I used a piece of plywood and cut 2 ~4" holes to hold the 20 and 5 micron filter housings. The carbon/chlorine filter is tucked in next to the pump (pic #2). I placed the 50" long membrane housing high up in the bilge, above my keel (pic #3). By adding a high pressure hose, and mounting the flow-meter, valve, pressure gauge, and switches to a panel I now have a nice looking remote panel (pic #1). The total dissolved solids meter that is calibrated for salt is not shown in the picture. The hoses are not all connected in these pics and the raw water pump is not shown.

Last weekend I changed the filters for the first time and it was a piece of cake. I simply disconnected the lines from the John Guest quick disconnect fittings, lifted the filter housings out, removed the filters and cleaned the housings, and reinstalled. It took less than 10 minutes.

By adding a second osmotic membrane to the system, the output is increased by 50% with no increase in power used. I plan on making this addition to my system soon. This will just decrease my daily run time while producing the same amount of water.

Note: I have no connections or monetary interests in SeawaterPro. I'm posting this information because I think that it's a great product available for a very fair price. I think that many of the other manufacturers are price gouging the boating community. I have contacted the company several times with questions regarding the watermaker and I am impressed with their customer service.

[Sailmonkey]

Originally Posted by Zai

I have a Purewater Whisper 30.
Don't know the brand of pump but it is a centrifugal pump.
The specs say 20 amps but I measure it quite often and have never seen it draw more than 15 amps.

It’s actually a vane pump



Centrifugal is unable to generate the pressure needed for RO.

[Zai]

Originally Posted by Sailmonkey

It’s actually a vane pump

Attachment 184612

Centrifugal is unable to generate the pressure needed for RO.

Thanks

[mikedefieslife]

Originally Posted by Sailmonkey

It’s actually a vane pump

Attachment 184612

Centrifugal is unable to generate the pressure needed for RO.

Reminds me of a rotary engine.

[Dolphin460]

Personally can make water at 55g/h and would not be happy will less. My unit is HRO Horizon Seafari SFM-900-2 50/60Hz, 2 tubes 230 Lts / 60 Gals per hour). I have to use my 9kg Onan to run my unit, but because it makes water so fast I do not have to run it very long.