Light gravity feed water filter DIY

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gear-report
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Light gravity feed water filter DIY

Postby gear-report » Tue Mar 22, 2011 2:43 pm

Howdy folks.
I went on a group hike and hang a few weeks ago with a bunch of folks from hammockforums.net. Found that many of the faster hikers were carrying water filters instead of carrying jugs of water.
Back in the day I used a First Need filter on AT hikes, and it worked great, but was a lot of work to maintain and to pump water through.
So, I went looking for ideas on a better way to get water on the trail... and found ideas on a gravity filter.

The concept is pretty simple:
Fill the bag with unfiltered water, it drains down a tube to an inline water filter, then either out a tube to a container, or directly into a hydration pack.
Pretty cool, huh.
I've made 2, with some differences in features.
Really happy with the results so far.

Can't wait for the scale I ordered to come in so I'll know what they weigh, but I'm guessing they are about 8-10 oz at the most.

Complete directions, pictures, and even links to some videos are here:
http://gear-report.com/how-to-make-a-di ... ency-myog/
(link fixed...sorry)

Making each filter setup took maybe an hour. Documenting and writing it up took several hours. Gotta love when the project is so quick and simple.
Last edited by gear-report on Wed Mar 23, 2011 8:28 am, edited 1 time in total.

realityguy
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Re: Light gravity feed water filter DIY

Postby realityguy » Tue Mar 22, 2011 2:54 pm

it might take you longer than an hour to make one with your link: :lol:
Error 404 - Not Found

Dang! I hate to be the bearer of bad news, but the page you just looked for... well... it doesn't exist (or maybe it has just been moved).
Don't lose hope! Why don't you check the URL. I'm sure you typed it perfectly... but just in case. :)

If you still can't find what you're looking for, try using the search form below.

I found that Walmart had a water bottle with a good lightweight filter in it and made myself one last year that was super simple and could easily be done at a kitchen table...see if I can find the thread..

Here it is!..miscatagorized with other stuff,of course.See the third post...
viewtopic.php?f=4&t=4725 It was a nice easy setup to make..The sawyer bottle makes it simple.
The views and opinions expressed by this person are his own and not the general consensus of others on this website.Realityguy

sudden
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Re: Light gravity feed water filter DIY

Postby sudden » Tue Mar 22, 2011 4:11 pm

He has it on his site but the link in the msg is faulty.

Try this
http://gear-report.com/how-to-make-a-di ... ency-myog/
"People are not persuaded by what we say, but rather by what they understand."

sudden
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Re: Light gravity feed water filter DIY

Postby sudden » Tue Mar 22, 2011 4:14 pm

I've seen it described before but your directions are the best so far. Thanks for putting it all together.
"People are not persuaded by what we say, but rather by what they understand."

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ConnieD
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Re: Light gravity feed water filter DIY

Postby ConnieD » Tue Mar 22, 2011 4:41 pm

Here is the Platypus Gravityworks Water Filter. Cascade Designs have managed to make it more lightweight, than their previous version.
http://cascadedesigns.com/platypus/filt ... er/product


Here's my DIY gravity filter kit. I like the Sawyer filter.
Image


Here is a Jason Klass DIY video. He likes the Frontier Pro filter.



This is the description from my website.
I have a Sawyer in-line water filter, because I can use it in towns on a thru-hike or near the trailhead, plus I can use it with my 1L or 2+L Platy Bottles or plusBottle with either the Platypus Quick-Disconnect Kit or Shutoff Valve accessories.

It should be noted, the Platypus GravityWorks/Cleanstream™ Filter Cartridge is available separately, either for replacement or to assemble your own gravity filter kit using the smaller 1L or 2+L Platy Bottles or plusBottle.

The 4 Liter Platypus GravityWorks™ Water Filter complete system is also available.

I "prefilter" with a cloth or one of the .4 micron prefilters available for widemouth water bottles, which I "dunk" below the surface using a hiking pole.

The inline water filter is suspended between the Platypus containers, for gravity feed. I do this during lunch break, or at the end of the day. I treat the water, inside the container by adding the right amount, and no more, of McNett AquaMira 2 part water treatment drops in plastic Microdrop dropper bottles. I wait for the amount of time for the water temperature. This is why I have two drinking water containers. One is ready for drinking, while the other is getting ready for drinking. I have the larger Platypus water container, full overnight, and ready for drinking and using the next morning.

The 4 Liter MSR Autoflow Microfilter has a top-opening water bag, much like the storage bags for kayaking. It is possible to rinse out this bag entirely.

1.8, 2, or 3 Liter Platypus Big Zip SL also has a top-opening water bag, possible to rinse out entirely.

ref: http://www.ultralightbackpackingonline.info/water1.html


It wasn't inexpensive to put it all together.

I like the fact, your kit is truly DIY/MYOG.

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zelph
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Re: Light gravity feed water filter DIY

Postby zelph » Tue Mar 22, 2011 11:29 pm

sudden wrote:I've seen it described before but your directions are the best so far. Thanks for putting it all together.


I agree, Jeff did a great job on the instructions.

Thank you Jeff!!!! :D
"Nothing Ventured Nothing Gained" stove store = http://www.woodgaz-stove.com/

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gear-report
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Re: Light gravity feed water filter DIY

Postby gear-report » Wed Mar 23, 2011 8:44 am

Thanks for the feedback, everyone, and sorry for the post with a bad link.
I have fixed the link in the original post.

On the pre-filter note... I've been looking for a good solution to two problems:
-prefilter the water to protect the Sawyer filter (which can be back-washed in the field, but is supposed to be treated with bleach before the next use)
-active charcoal to help with taste

ConnieD mentioned using a pre-filter from a water bottle. I think I'll see if I can kill 2 birds with one little foam stone. Pretty sure I saw a new straw type water bottle filter in the Outdoor Products brand section @ WW. If I can fit that on the intake hole in my unfiltered water bag, then it can prefilter and treat for taste before the Sawyer filter.

I've also seen a katadyn carbon inline filter... That may be an option to consider also.

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ConnieD
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Re: Light gravity feed water filter DIY

Postby ConnieD » Wed Mar 23, 2011 11:21 am

Last night, I was looking at the "water heater adapter" for the Aquamira Frontier Pro water filter.
http://aquamira.com/consumer/frontier-p ... oose-right

It has a screen, that may be back-flushed, and, a replaceable prefilter for silt. Their "water heater adapter" might screw on any pop-bottle or small Platypus bottle thread, between the two containers. That might be a first-step before filling the gravity-feed water filter.

I have also had a Hiker Pro prefilter, specifically for silt. That was years ago. I don't see parts available, now. MSR Miniworks has parts available: http://casanovasadventures.com/catalog/water/p860.htm

The foam float on the tube could slide further on the tube, so the water entered just below the surface of the water source (if a lake). That was the practice, the greatest concentration of giardia said to float on the surface.

I almost never use chlorine dioxide treatment, although I will carry those tablets in preference to iodine. I rely on .1 micron filter, or, boiling water.

I have used a coffee filter cone held by a rubber band, or string, over a wide-mouth bottle for a prefilter for silt. Dampen the coffee filter and, optionally, place it in the bottom of your dirty water bag. Either that, or a separate prefilter, so the primary water filtration system isn't contaminated.

I think the answer, is, How dirty is the water?

For desert hiking sections, of the CDT, an Aquamira Frontier Pro "water heater adapter" between two spent water bottles might be the idea. Here are YouTube video for a water filter for drinking from a dirty water source.





ref: http://www.vestergaard-frandsen.com/lifestraw
PDF: http://www.vestergaard-frandsen.com/com ... cdesc=DESC

sudden
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Re: Light gravity feed water filter DIY

Postby sudden » Mon Mar 28, 2011 10:15 am

gear-report wrote:Thanks for the feedback, everyone, and sorry for the post with a bad link.
I have fixed the link in the original post.

On the pre-filter note... I've been looking for a good solution to two problems:
-prefilter the water to protect the Sawyer filter (which can be back-washed in the field, but is supposed to be treated with bleach before the next use)
-active charcoal to help with taste

ConnieD mentioned using a pre-filter from a water bottle. I think I'll see if I can kill 2 birds with one little foam stone. Pretty sure I saw a new straw type water bottle filter in the Outdoor Products brand section @ WW. If I can fit that on the intake hole in my unfiltered water bag, then it can prefilter and treat for taste before the Sawyer filter.

I've also seen a katadyn carbon inline filter... That may be an option to consider also.


Found this diy solution to a prefilter. Maybe you can use it as a start.
http://woodtrekker.blogspot.com/2010/07 ... ks-ex.html
"People are not persuaded by what we say, but rather by what they understand."

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zelph
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Re: Light gravity feed water filter DIY

Postby zelph » Mon Mar 28, 2011 11:28 am

I got sidetracked on "woodtrekkers's site" :roll:

Far Out-Heimo's Arctic Refuge (I only got half way through the video)

http://woodtrekker.blogspot.com/search/ ... ducational

Myths and Misconceptions About Drop-Forged Axes is right underneath the video. an interesting read.
"Nothing Ventured Nothing Gained" stove store = http://www.woodgaz-stove.com/


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