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Thread: Water filtration request

  1. #1
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    Default Water filtration request

    I would like to prevent unclean / "contaminated" water to get into my water tank from a shore supply. I am thus looking for a water filtration system which I can fit to my own water hose which then gets linked to the supply tap.

    I did come across such a system for sale in Germany but have lost the info - any leads? Thanks
    Roger

    ------------------
    I look to the future, because that's where I am going to spend the rest of my life - George Burns

  2. #2
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    Default Re: Water filtration request

    Hi
    I have just bought a three stage one to do just that job.
    Its made here in the UK and is based on the filter on the Majika video.
    Two particle filters and a carbon filter - connects with standard hose fittings.

    Cost about £250 or so.

    If this sounds right I will dig out the contact.
    Safe Sailing
    Paul
    Blog: www.suliere.com

  3. #3
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    Default Re: Water filtration request

    I have well water at the dock and have made do with a charcoal filter for the last two seasons. There is a variation that has garden hose threads, but I just figured out that I need to use drinking-water-safe hose to avoid that garden hose flavor.

  4. #4
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    Default Re: Water filtration request

    i use 2 of these with a 5 micron and a carbon filter.
    buy the bits sepratly much cheeper and use food safe hose on the output side.
    http://www.emwc.uk.com/Details.asp?ProductID=204
    majika

  5. #5
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    Default Re: Water filtration request

    What size hose fits this system? Mine is in SA so I cannot find out.

    Do you know a supplier of the food safe hose?
    Safe Sailing
    Paul
    Blog: www.suliere.com

  6. #6
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    Default Re: Water filtration request

    Paul,
    I take it your system is also an emwc then?

    Paul and Majika,
    What is the water flow rate per minute exiting your filtration systems?

    I have now come across this water filter:
    http://www.yachticon.de/Water-Filter...barbs::82.html
    Am awaiting information on the flow rate.
    Roger

    ------------------
    I look to the future, because that's where I am going to spend the rest of my life - George Burns

  7. #7
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    Default Re: Water filtration request

    Yes both are from emwc
    I use a 50 micron a 5 micron and a carbon on a frame so that its easy to hang up and stow but this is more expensive that just buying the 3 filters and screwing them together.
    I have forgotten the water flow rate ( I am specing so much these days its a blur) but I do know that it was high and more than adequate.
    Safe Sailing
    Paul
    Blog: www.suliere.com

  8. #8
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    Default Re: Water filtration request

    thred size is 3/4bsp which is same as europian washing machin hose etc also same size as garden tap and quick lock hose conection.
    any blue colour water filling hose is normaly food grade and will say on packing, or clear hose used for air lines/fish tanks
    home brew etc will be food grade.
    flow rate i think is on the web page i linked
    but will not be a problem with most 1/2" pontoon supplys
    have only had problem when using supplys ment for big ships who take on several tones at a time.
    majika

  9. #9
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    Default Re: Water filtration request

    Quote Originally Posted by majika View Post
    or clear hose used for air lines/fish tanks
    home brew etc will be food grade.
    Not a good idea to use clear hose, as this allows light inside and is thus more prone to algae drowth.
    Insanity is continuing to do the same thing and expecting different results

  10. #10
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    Default Re: Water filtration request

    Quote Originally Posted by Talbot View Post
    Not a good idea to use clear hose, as this allows light inside and is thus more prone to algae drowth.
    dont be silly its only 1m neded to go from the out side of the filter to the filler on the boat and its only in the day light when in use.
    it does not hold water when put away and you should never store a hose with water in it.
    also you can see any problems in the hose.
    majika

  11. #11
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    Default Re: Water filtration request

    Quote Originally Posted by majika View Post
    dont be silly .
    only read the last post, and forgot that you were using this for the filling of the tank.

    The PO in my boat had used clear hose for some of his permanent water hose, and it was disgusting. So thought it was worth mentioning.
    Insanity is continuing to do the same thing and expecting different results

  12. #12
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    Default Re: Water filtration request

    i agree be verry carefull with the onboard water pipes.
    in the uk most boats use the household plastic systems
    speedfit and hep2o.
    hope i wasent to strict
    majika

  13. #13
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    Default Re: Water filtration request

    This is the water filter I purchased.
    Attached Images Attached Images
    Safe Sailing
    Paul
    Blog: www.suliere.com

  14. #14
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    Default Re: Water filtration request

    I have been advised that the flow rate on Yachticon's filter is 10 l/min.
    Roger

    ------------------
    I look to the future, because that's where I am going to spend the rest of my life - George Burns

  15. #15
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    Default Re: Water filtration request

    Quote Originally Posted by ForumAdmin View Post
    This is the water filter I purchased.
    Looks like it is designed to hang on a wall. I would look carefully at the security of the attachment onboard as it may not be strong enough .
    Insanity is continuing to do the same thing and expecting different results

  16. #16
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    Default Re: Water filtration request

    Just wanna remind folks that this kind of filtration takes care of solids and some metal and organic contaminants, but it does nothing about bacteria or viruses. To remove bacteria you would need <0.5 micron filter, which would slow your fill rate to about a liter per minute. Furthermore, the carbon filter removes residual chlorine from the water before it goes into your tank. In a temperate climate you should maintain residual chlorine in your onboard tanks between 1 and 5 mg/l (PPM) to prevent bacterial growth unless the residence time of the water is just a few days. I have no experience in the tropics yet, but expect that bacterial growth is significantly accelerated by the higher temperatures.

  17. #17
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    Default Re: Water filtration request

    my system is based on the fact that the water you are taking on is drinkable
    but you could try this
    http://www.emwc.uk.com/Details.asp?ProductID=751

    and or uv but that means power!
    majika

  18. #18
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    Default Re: Water filtration request

    Quote Originally Posted by majika View Post
    my system is based on the fact that the water you are taking on is drinkable
    but you could try this
    http://www.emwc.uk.com/Details.asp?ProductID=751

    and or uv but that means power!
    Phillip:
    I am unfamiliar with this product but will ask an engineer friend who is involved with certifying such devices. I think that UV is still in the R&D stage as far as devices employed at the point of use.
    Of course, municipal water supplies are dependable under normal circumstances. They put water into the distribution systems with residual chlorine as a precaution, not expecting chlorine removal or a long residence time in the system. When we violate those expectations, we just need to take some additional precautions.
    Cheers,
    Larry

  19. #19
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    Default Re: Water filtration request

    A bank of three filters when filling the tanks seems a bit excessive, particularly as has been pointed out that the carbon filter will remove any chlorine. We use a single filter (much like one of Paul's housings) just to remove sediment during filling with a hose, but filter our drinking water from our tanks through a Nature Pure filter and a dedicated tap. This means we're only filtering the water we drink (and cooking with etc.), saving on filters and removing any "tank taste" at the same time. We've been using this method for a few years now and it works well, our drinking water tastes great (often watermaker product mind you) and neither of us has suffered any ill effects from dodgy water. Good enough for me!

  20. #20
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    Default Re: Water filtration request

    Phillip:

    My friend said "I would not consider a device unless there was at least testing available from a recognized lab. If they listed a lab, you would be able to google and find information about their certification credentials."

    No evidence of testing is mentioned on the website. Without certifications tests this device cannot be sold legally in California. I've attached a table showing sizes of common waterborn bacteria. (I donít know the reference from which this is taken.) As you can see from the table, many pathogenic bacteria are smaller than the filter size of this unit. Without test data to show otherwise, it would be reasonable to presume that the device does not function as advertised. Unfortunately this appears to be one of many devices on the market today that make such unsubstantiated claims.
    Attached Files Attached Files
    Last edited by lhsmith; 29th October 2009 at 09:41 PM.

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