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Old 12-09-2018, 11:00   #16
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Re: Watermaker: High pressure pump selection

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Originally Posted by billknny View Post
The Junior Puppy would be a very bad choice of feed pumps to use. Your feed pump must NOT be a positive displacement pump.

If at all possible, your plumbing should be set up so the feed pump is below water level and does not need to be self priming. If that is a requirement for some reason, you have a more complex problem....

A March magnetically coupled centrifugal pump matched to the overall flow rate of the system is far better choice than the Junior Puppy.
I learned something new
I actually have a MARCH AC-5C delivering water for our A/C. Max. head for the pump is 27feet so should be possible with the position I am considering.

Will see if possible to add an extra outlet.

Thanks
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Old 12-09-2018, 11:04   #17
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Re: Watermaker: High pressure pump selection

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If you're going to use a Danfoss you'll need to pay extra attention to the pre-filtration. Filtering down to 1 Micron is important.
Thanks Tellie. Worth an extra thought.
Am considering the Wanner Hydra-Cell G10 (EU version of the US D10).

Any thoughts on that one?
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Old 12-09-2018, 20:21   #18
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Re: Watermaker: High pressure pump selection

I had a water maker system that used a Kubota 1 cylinder diesel to belt drive a high pressure pump. The Kubota died so I replaced it and the pump with a Karcher pump. I had a 2kVa genset already so all it meant was I had to run the genset to run the water maker instead of run the diesel. This ran for 4 years and then I sold the boat. I bought a spare as the Karchet units were only $99 and stored this in a zip lock bag but never needed it.

The only disadvantage I saw was that the pump was noisy.
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Old 06-11-2018, 05:00   #19
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Re: Watermaker: High pressure pump selection

The water cooled Karcher pump is much quieter and Karcher says it Lasts twice as long as the Karcher standard pump.
Mine puts out a nice hum that is not irritating at all.
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Old 06-11-2018, 05:03   #20
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Re: Watermaker: High pressure pump selection

I ended up ordering a DANFOSS APP 0.8. Not cheap but quiet and good quality.

Will share details when up and running
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Old 06-11-2018, 11:29   #21
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Re: Watermaker: High pressure pump selection

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Originally Posted by Quadrille in JB View Post
The water cooled Karcher pump is much quieter and Karcher says it Lasts twice as long as the Karcher standard pump.
Mine puts out a nice hum that is not irritating at all.
Karcher say it can get up to 81 dBA. That is vacuum cleaner levels of noise.
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Old 06-11-2018, 13:26   #22
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Re: Watermaker: High pressure pump selection

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Karcher say it can get up to 81 dBA. That is vacuum cleaner levels of noise.
The Karcher K4 water cooled pump is certainly not as loud as a vacuum cleaner. The SeawaterPro video microphone picks up the noise much louder than it actually is.
Out of curiosity, I contacted the SeawaterPro manufacturer today and asked him about pump failures. He stated that in two years of production with over 300 units in service they have had zero failures on the Karcher K4 pumps.

I am in no way connected to SeawaterPro, Inc. All I am is a very satisfied customer whose interest is in an affordable, reliable water maker.
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Old 09-11-2018, 06:19   #23
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Re: Watermaker: High pressure pump selection

What size generator do you use on the K4?

Specs say it draws 1800w. that seems like a fair amount given that Cat pump typically needs 1hp to produce 800psi, meaning it can be run of a small Honda EU20i suitcase generator.
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Old 09-11-2018, 06:56   #24
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Re: Watermaker: High pressure pump selection

I am currently installing a seapro water maker. I pick my system up in person in Fort Lauderdale. I really did not like the Kartcher pump. So I opted to spend another thousand dollars to get the upgraded stainless pump and stainless 1 horsepower motor I am close to getting it completed will update at that time
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Old 09-11-2018, 06:59   #25
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Re: Watermaker: High pressure pump selection

This is the upgraded pump
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Old 09-11-2018, 16:33   #26
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Re: Watermaker: High pressure pump selection

[QUOTE=mikedefieslife;2758255]What size generator do you use on the K4?

Specs say it draws 1800w. that seems like a fair amount given that Cat pump typically needs 1hp to produce 800psi, meaning it can be run of a small Honda EU20i suitcase generator.[/QUOTE

The Karcher K4 pump and the upgraded raw water pump uses 9.9 amps @120vac. Thatís less than 1200w. I have a 3.5 kw NextGen generator but I usually run the watermaker on my 2000w Kisae pure sine wave inverter when the PV panels are maxing out. Nice and quiet operation while sailing.
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Old 09-11-2018, 16:35   #27
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Re: Watermaker: High pressure pump selection

[QUOTE=Quadrille in JB;2758770]
Quote:
Originally Posted by mikedefieslife View Post
What size generator do you use on the K4?

Specs say it draws 1800w. that seems like a fair amount given that Cat pump typically needs 1hp to produce 800psi, meaning it can be run of a small Honda EU20i suitcase generator.[/QUOTE

The Karcher K4 pump and the upgraded raw water pump uses 9.9 amps @120vac. Thatís less than 1200w. I have a 3.5 kw NextGen generator but I usually run the watermaker on my 2000w Kisae pure sine wave inverter when the PV panels are maxing out. Nice and quiet operation while sailing.
So does your inverter confirm that you're burning 10 amps or less to run this watermaker?
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Old 09-11-2018, 17:27   #28
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Re: Watermaker: High pressure pump selection

I use a high quality Fieldpiece DVM that measures AC amps to read the 9.9 amp AC current. My inverter readout also agrees. The DC current into the inverter is 10x the AC output or ~100 amps. I keep it pretty close to my 20c discharge rate by running the watermaker when my PV panels are putting out close to 60 amps.
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Old 09-11-2018, 17:33   #29
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Re: Watermaker: High pressure pump selection

100 amps is a lot. Most people can't make anywhere near 60 amps with their solar. I have an 8K westerbeke diesel generator. So at 20 gallons an hour I figure an hour either everyday or every other day should handle my needs.
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Old 09-11-2018, 17:47   #30
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Re: Watermaker: High pressure pump selection

Yes
We run it for less than an hour each day followed by a 10 minute freshwater flush. This doesnít really use that much fresh water. And you donít have to worry about pickling it.
I just looked at the specs for a K4 pump and itís speced at 1800 watts, but thatís at 1,88O psi, and weíre only using it at 800psi. Big difference.
I have 2-360w Sunpower panels with 2 victron 100/30 controllers that kicks butt! They have a built in blue tooth monitoring app for your phone that provides realt time output as well as 30 day history. I also verify the output using a Victron 702 battery monitor.
Attached is a screenshot of the output of one panel.
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