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    Build Your Own Homemade For $1

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    Post  Frankie27 Thu Jan 21, 2010 4:19 am

    So I was at Bunnings today and I saw this:

    Build Your Own Homemade For $1 Sany0011

    It's called a Universal Water Spray, it is on clearance for only $1. This thing is absolutely perfect for out foam shooting needs.

    "How does it work?", you say. Well there is a pump built into the back with no overpressure valve:

    Build Your Own Homemade For $1 Sany0012

    Next you attach an airtank to the screw port, I am using a 1.25L Pepsi bottle atm, but 600ml is much easier/efficient:

    Build Your Own Homemade For $1 Sany0013

    The trigger works by just pressing down on it like so:

    Build Your Own Homemade For $1 Sany0015

    Okay now we are all set to spray water Now to make it fling some foam.
    Grab your pliers and twist out these 2 copper end pieces that help create the spray. Don't remove the plastic piece altogether as this destroys the seal:

    Build Your Own Homemade For $1 Sany0014

    After that, you just need to slap a barrel on and its good to go. Hep20 fits perfectly over the end, no need for glue.

    With around 50 pumps in a 600ml bottle, I can get 5 70ft shots, with the next 2 going around 45ft. The rest of the air is useless.


    Last edited by Frankie27 on Thu Jan 21, 2010 4:44 am; edited 2 times in total
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    Post  Guest Thu Jan 21, 2010 4:30 am

    Couldnt you just slap some pvc over it... or would the spray make it shoot 1 metre.
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    Post  Guest Thu Jan 21, 2010 4:38 am

    looks very difficult to make ....
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    Post  Frankie27 Thu Jan 21, 2010 4:46 am

    TheAussieNerfMan wrote:Couldnt you just slap some pvc over it... or would the spray make it shoot 1 metre.

    I don't get what you mean?

    @MitchellG, I don't know what you are talking about, this has to be the easier homemade possible. You just screw in a bottle and add a barrel.
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    Post  Guest Thu Jan 21, 2010 4:50 am

    Never mind... i was thinking of just putting pvc instead of removing the copper.
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    Post  Frankie27 Thu Jan 21, 2010 4:59 am

    Oh OK, if you didn't remove the copper, the air comes out of a hole the size of a pin = useless
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    Post  Roger Explosion Thu Jan 21, 2010 12:31 pm

    Now This i'll have to try. This thing could be cool with an RSCB, seeing as though you can get multiple shots.


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    Post  Nitefinder24 Thu Jan 21, 2010 2:18 pm

    Awesome! I might try that.
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    Post  inf0rm3r Thu Jan 21, 2010 3:06 pm

    If it was possible to reduce the amount of pumps it would become one piece of awesomeness.
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    Post  Angel Thu Jan 21, 2010 3:52 pm

    GRRR ROGER GRR


    Last edited by Angel on Fri Jan 22, 2010 1:14 am; edited 1 time in total
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    Post  Roger Explosion Thu Jan 21, 2010 4:23 pm




    You should try reading the first post.


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    Post  Fudge! Sat Jan 23, 2010 5:28 am

    Are you sure the pepsi bottle can take the presure?
    Considering how close it is to your body you wouldn't
    want it to burst.
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    Post  Guest Sat Jan 23, 2010 6:24 am

    I would just glue around the bottom because that is the weakest point.
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    Post  BlackOps Sat Jan 23, 2010 8:57 pm

    TheAussieNerfMan wrote:I would just glue around the bottom because that is the weakest point.

    Hate to burst your bubble, buuuutt...

    The bottom and neck of PET bottles are actually its strongest point.

    The weakest point in these, are the lips that runs around the bottle, just above and below the label.

    In the manufacturing process the plastic is stretched, by expanding air, to the inside of a mould.

    That lip is where the plastic is stretched the most. That is also its thinnest point.

    Depending one what adhesive you used at the top, that could be your weakest point.
    PVC, ABS, and PET all have different chemical compositions.
    There aren't many adhesives that will bond one type to another efficiently.
    Although I've found that PVC adhesive (the high-grade stuff), works well on most plastics.

    I wouldn't recommend using glue as reinforcement, as most glues become brittle when set.
    If the bottle lets go, the glue can shatter, making the bottle a shrapnel grenade.

    I would use fiber-tape around the two lips, and one through the center, to stop bowing.
    That stuff has a very high tensile strength.
    You can get it from most hardware or automotive stores.
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    Post  Guest Sun Jan 24, 2010 12:46 am

    Really? Wow I was just watching mythbusters i must have heard wrong... thanks for correcting me.
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    Post  WV17 Sun Jan 24, 2010 2:19 am

    hows about beefing it out a little, ie a trigger mechanism an a stock an dart storage blah blah blah this could become a very acceptable primary imo.
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    Post  Guest Sun Jan 24, 2010 2:27 am

    Homemades sometimes aren't aloud at wars.
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    Post  WV17 Sun Jan 24, 2010 2:42 am

    doesnt it depend on power... ie a gun as powerful as a singled titan or my flash flood conversion are no nos but a 75 ft or 20 meters isnt too bad
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    Post  BlackOps Sun Jan 24, 2010 8:13 am

    TheAussieNerfMan wrote:Really? Wow I was just watching mythbusters i must have heard wrong... thanks for correcting me.

    Nah, you probably did hear them correctly.

    I personally dont find those guys much use, as they dont actually conduct true experiments. They use thier scientific knowledge to create interesting scenarios for the simple purpose of entertainment.

    I was simply speaking from experience.

    I wanted to learn the weak point of a PET bottle, so i set about learning how they where made, and learnt the chemistry and physics behind them.

    And then set about killing 20 PET bottles.

    Only one them busted through the bottom.
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    Post  melbourneSTORM4eva Sun Jan 24, 2010 1:10 pm

    Wow ...nice find mate I think I might have to try this!
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    Post  BlackOps Sun Jan 24, 2010 2:26 pm

    Have you seen these in any other shop besides Bunnings?

    I havent seen those in Perth yet.

    Im thinking i might find them in a different shop.

    Or old age could be getting to my eyes already...

    Good find. Simple and effective.
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    Post  Frankie27 Mon Jan 25, 2010 1:55 am

    Well they we're on clearance so they could be gone by now. They we're located near all the hose fitting etc.
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    Post  Guest Sat Jan 30, 2010 9:34 am

    I just saw the same thing in the $2 shop. I think it was $3.50. I didn't get one, but they have heaps in stock.
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    Post  WV17 Sat Jan 30, 2010 12:19 pm

    @ blackops: I jumped of a 2 meter wall onto a coke bottle and the bottom cracked
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    Post  Guest Sat Jan 30, 2010 12:59 pm

    Actually, i think i might go buy one tomorrow, see how that works.
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    Post  littlebro05 Sun Mar 07, 2010 11:01 am

    Sorry for replying on the old threat I'm just curious... does the pepsi bottle screw in perfectly into that pump?

    Also, from what I've experienced I'm pretty sure a pepsi bottle can hold up to 100PSI I've test it before back in my spudding days,

    I think I'll go check that thing out because it looks super useful.
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    Post  Frankie27 Sun Mar 07, 2010 12:22 pm

    Yes the Pepsi bottle does screw in perfectly, it was designed to take bottles and nothing else.
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    Post  AlmostExperts Mon Mar 08, 2010 12:08 pm

    I spent a whole hour down at bunning andidn't find one.. Can you get them anywhere else?
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    Post  Ghost Sat Apr 17, 2010 3:18 pm

    hey this is pretty cool but its 12 buks at my bunnings
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    Post  piggy123:) Sun Aug 08, 2010 11:05 am

    Whats it called because i might go buy one.

    THX gy123
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    Post  Darth Lai Wed Aug 11, 2010 2:05 pm

    Um. Did you even read the the first post? It says what it's called.

    Universal Water Spray to answer your question.
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    Post  Aaron Thu Dec 16, 2010 3:17 am

    Huge Bump. Found a shit load of these at 'Spare Change' in Geelong next to the reject shop.
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    Post  Darth Lai Thu Dec 16, 2010 8:24 am

    Haha, sweet. Still one dollar?
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    Post  Aaron Thu Dec 16, 2010 10:13 am

    Darth Lai wrote:Haha, sweet. Still one dollar?
    8 bucks.
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    Post  melbnerf619 Sat Jan 29, 2011 3:20 am

    I went down to Bunnings the other day but i couldn't find it. I was so interested i gave one of the staff a picture and the name but he still couldn't find it. Do you know if they still have it? Or what about any other store?

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