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Ike Mouser
(isaac.mouser) - F
MYOG Cuben + Sawyer Gravity system on 09/25/2009 19:04:32 MDT Print View

Hey everybody! I am searching for a better water treatment system, i dont like the thirty minute wait time with my current setup (2 2L platys + frontier pro in gravity mode + micropur), and it only filters 2L at a time! That means if i want more fast, i have to pack another 2l platy and treat them both simultaneously with micropur, once they are done, one then the other through the gravity system. I dont like the wait penalty and I dont like the extra weight.

Also if i make one of these similar to the amigo, i can use it as a packcover and bearbag! Saving me the weight of lugging around a pack cover and food bag.

Possible Solution 1:

Make a cuben version of the amigo pro, except use a sawyer instead of an amigo.

couple questions:

1. Can i use my hosing that came with my platypus's? seems kinda heavy. If lighter tubing can be found let me know.

2. What pieces of hardware will i need? ie plastic connectors, metal fasteners etc.

3. How to attach the sawyer to the cuben part.

4. If I get the sawyer purifier instead of the filter, will it be super slow or whatnot? IF anyone has experience with this, please chime in.

thanks everybody.

PS-Is cuben really nearly $30 a yard? Is so, i may be reconsidering!

Edited by isaac.mouser on 09/25/2009 19:24:05 MDT.

Ross Bleakney
(rossbleakney) - MLife

Locale: Cascades
Re: MYOG Cuben + Sawyer Gravity system on 09/25/2009 19:47:31 MDT Print View

I don't use a cuben bag, but use two platypus instead. One is the clean one, while the other is the dirty one. I just use the connectors made for drink tubes. The dirty one has string tied to the bottom so I can hang it from a branch. I sometimes have to burp the system, but it works well. When hiking, I use the dirty platypus, connected to the filter and just drink and go (so I don't carry much water). Water weighs way more than any of the other equipment, so if I'm traveling next to a stream (or a bunch of lakes) I can save quite a bit on my average weight. I use the drip system around camp (where it is nice to have a clean platypus to drink from). I could (if I wanted) just drip into the cook pot (to save a few ounces and not bring a "clean" platypus). I hope all that made sense. I believe my filter is a Seychelle (not Sawyer). It drips fairly quickly (a couple minutes or so to drain a bag). It doesn't handle viruses, but I'm not worried about it where I hike (Washington State, Canadian Rockies, etc.).

Edited by rossbleakney on 09/25/2009 19:48:19 MDT.

Walter Carrington
(Snowleopard) - M

Locale: Mass.
MYOG Sawyer Gravity system. on 09/25/2009 19:53:32 MDT Print View

This thread has parts numbers from US Plastics that help. Check out Tony Fleming's posts.
http://www.backpackinglight.com/cgi-bin/backpackinglight/forums/thread_display.html?forum_thread_id=20707&skip_to_post=175199#175199

The tubing from your platypus is probably fine.
People have also made gravity systems using the top of a nalgene bottle and cutting off the threaded part of the bottle to use as the fitting clamped onto the bag.

Just use silnylon for the bag, ala Ray Jardine.

Ike Mouser
(isaac.mouser) - F
purifier on 09/25/2009 22:33:25 MDT Print View

Yea i guess my whole point is to use the sawyer-no wait time. So basically is the purifier ok to use in a gravity setup, or is the filter size too small to allow adequate flow?

Aaron Sorensen
(awsorensen) - MLife

Locale: South of Forester Pass
Re: purifier on 09/26/2009 10:44:56 MDT Print View

Bill made one of these years ago out of cuben.

Check out his ul skunk works site.

Ike Mouser
(isaac.mouser) - F
experiment on 09/26/2009 14:18:38 MDT Print View

Ok so Here is the update:

I am awaiting on tony's ok to order the following parts:

1/4 female nylon adapter
1/4 male nylon adapter
silicone tubing
stopcock valve

I have ordered:
cuben fabric 1 yard
Sawyer Inline filter

Now my issues is:

I want to install a prefilter thing like the frontier pro has. I want to somehow install it before the filter. Would stuffing it up the tube work? or would that slow the rate of flow so much that it would render the system useless?

So i need suggestions on installing those little prefilters that the frontier pro uses in a sawyer inline gravity setup similar to the amigo pro, except the filter is not inside the bag, but down towards the platy that catches the clean water.

So it would look like this:

Tree --> Cuben bag similar to amigo -->; silicone tubing -->; prefilter frontier pro thingy --> Sawyer -- > tubing --> Clean platy.

Also in the future, i would like to discover a way to incorporate a charcoal element into the process, towards the end b4 it goes into the clean bag.

I will get pics up of the process once i get all the parts in and get to work.

Please offer advice and suggestions of you have any.

Edited by isaac.mouser on 09/26/2009 14:21:47 MDT.

Steve Parr
(srparr) - F

Locale: SE Michigan
prefilter? on 09/26/2009 15:08:46 MDT Print View

> ...I want to install a prefilter thing like the frontier > pro has.
> ...So i need suggestions on installing those little prefilters
> that the frontier pro uses
>
> ...So it would look like this:
>
>Tree --> Cuben bag similar to amigo -->; silicone tubing -->; prefilter frontier pro thingy --> Sawyer -- > tubing --> Clean platy.
>
> Also in the future, i would like to discover a way to incorporate a charcoal element into the process, ...

I have been thinking along similar lines. The Frontier Pro is only about 2.2 ounces ... what about just using that as a prefilter/charcoal element prior to the Sawyer? Not the lightest option, but it should work just fine!

Troy Ammons
(tammons) - F
Re: experiment on 09/26/2009 15:35:19 MDT Print View

You could use a section out of a 1 micron polyester strainer bag as a prefilter.

Ike Mouser
(isaac.mouser) - F
hey on 09/26/2009 17:18:28 MDT Print View

WIll think about that. I am trying to avoid the frontier pro, i fear it will stop working after a few days-as most report. I also want to avoid the weight of the whole thing, when i only need the prefilter part of it. The point of this setup is weight reduction, and RELIABILITY (which the frontier pro seems to lack). The ability to backwash the sawyer is important. The point of the prefilter is to increase the longevity of the sawyer.


possibillities for prefilter part:

$22 + ship .1 micron polyester filter bag:

http://www.highlandwoodworking.com/index.asp?PageAction=VIEWPROD&ProdID=2180


$14.99 + ship 1 micron
http://www.vacdepot.com/product-info/655?utm_source=FGL_VACDEPOT&utm_medium=compare&utm_term=10-0007-A

Does any1 know where to get more of those prefilters that come with the frontier pro?

Edited by isaac.mouser on 09/26/2009 17:26:39 MDT.

Troy Ammons
(tammons) - F
MYOG Cuben + Sawyer Gravity system on 09/26/2009 17:26:37 MDT Print View

A small polyester prefilter from a filter bag is pretty light and cost less than $10. They make them in 1/2 micron, 1 micron and up.

Actually if you are treating your water with clorine and its a clean source you might not even need the AM filter at all.

There is a guy on youtube that uses one. You can look him up. Has it shaped into a cone. I tried one as a test and it flows well. but when wet is a bit heavy. Would make a good prefilter for a frontier pro.

Troy Ammons
(tammons) - F
MYOG Cuben + Sawyer Gravity system on 09/26/2009 17:28:01 MDT Print View

You can get the bags cheaper than that.

As far as the factory prefilters, I would contact AM.

Ike Mouser
(isaac.mouser) - F
chlorine on 09/26/2009 17:28:45 MDT Print View

I dont think i will be worrying about chlorine, maybe take it as a backup. The sawyer should take care of everything except viruses, and if i wanted to take care of that i would get the purifier. However, the purifier seems to have some issues with it so i am not confident in that. I want this system to provide: instant water treatment (no waiting, i accept virus risk, seeing it as unlikely at best), good weight savings, and good reliability.

Troy Ammons
(tammons) - F
MYOG Cuben + Sawyer Gravity system on 09/26/2009 17:33:14 MDT Print View

Yeah I know what you mean and the fontier pro is slow as mollases unless you sit on the dirty bag.

I dont care if I am stationary, but I dont want to sit around waiting in the middle of hiking.

That is what got me interested in using a part of these bag filters. I have been using MSR sweetwater drops that take 30 minutes which is not too bad.

Been thinking about a steripen too, but then your dealing with batteries.

Oh well.

Ike Mouser
(isaac.mouser) - F
revolution on 09/26/2009 17:44:52 MDT Print View

OK well i may have found the panacea of water filtration...6000 liters....filters EVERYTHING...weight is a mystery at this time...check this out and get your mind BLOWN. i may giveup my project because if its lightweight, i will probably spend the 150 anyway on all the parts and shipping for my system:

http://www.ted.com/talks/michael_pritchard_invents_a_water_filter.html

Troy Ammons
(tammons) - F
Re: revolution on 09/26/2009 18:13:41 MDT Print View

I want one.

Did I hear that right that this thing will process salt water ??

Edited by tammons on 09/26/2009 18:14:50 MDT.

Ike Mouser
(isaac.mouser) - F
hey on 09/26/2009 18:16:14 MDT Print View

I dunno about salt water, but the smaller one does 4000 liters....I always knew the filtration industry was lagging behind current advances in technology. Word is the EU will ban all chemical treatment of water in the near future, thus companies will have to embrace these new nanotechs or GOOB (go out of business)

Troy Ammons
(tammons) - F
MYOG Cuben + Sawyer Gravity system on 09/26/2009 18:31:37 MDT Print View

Too bad its so heavy.

Since a steripen will kill bacteria and viruses all you need is a cyst filter unless you are dealing with pollution.

I am more interested in the jerrycan rig.

My parent live in the sticks, and there well goes out all the time. I got stuck there for a 1 1/2 days with no water early this year. Luckily I had my pack with me with a gravity filter and some MSR sweetwater.

Ike Mouser
(isaac.mouser) - F
steripen on 09/26/2009 18:45:35 MDT Print View

Steripen does'nt kill cysts? My problem with the pen is it does nothing for taste.

Troy Ammons
(tammons) - F
MYOG Cuben + Sawyer Gravity system on 09/26/2009 18:57:55 MDT Print View

Hmm, looks like it does kill cysts.

Thought it did not. Maybe someone else should pipe in.
They are tough critters.

I originally thought you still needed to filter out the big stuff.

Still it would be pretty simple to filter through a 1/2 micron filter made out of a filter bag.

Steripen sells a 4 micron filter for filtering prior...

I have been playing around with a charcol filter drink bottle from Publix but its heavy. The charcoal filters are really cheap, like 2 for $7-8 and weigh just short of 2oz, but I cant find any other bottle it will fit in besides the factory bottle. I was hoping I could get one into a gatorade bottle, but no luck.

Ike Mouser
(isaac.mouser) - F
Charcoal + steripen on 09/26/2009 19:02:53 MDT Print View

DO you know if anyone has made a charcoal + steripen setup?