DIY coke bottle CO2 and glass diffuser

[hebi]

hi all, another question to all DIY CO2 user.my DIY Co2 is still producing CO2 as can be seen from the solution. however no bubble is coming out from the tube( i just use a bell to collect CO2)i dont know is it not enough pressure to even push the CO2 out or is that a leak somewhere, only possible place could be at the cap. for me, i drill a whole into the cap, then screw in the outlet(valve like thing bought at C32 those metal kind then it seems pretty tight. today i went near it and i could smell alcohol, so should i just seal the metal screw outlet with the cap? or is it normal to be able to smell alcohol for a DIY CO2?

[blackghost]

you shouldnt be able to smell the alcohol or the yeast solution..

use silicon or for my case, blu tack to provide the seal when the tube goes through the hole in the bottle cap so that air cannot escape through..

once you done that, use the soap water method to check for leaks.

another thing, if u smell alcohol, it means that the sugar water is also done fermenting.. so not much co2 will be emitted.

my 2 cents

[tawauboy]

.......... those metal kind then it seems pretty tight. today i went near it and i could smell alcohol, so should i just seal the metal screw outlet with the cap? ............

chances of a leak is pretty high. you'll need to seal this joint well. use glue or sealant.
there shouldn't be any alcohol smell if you do not open the co2 bottle. a sign that there is a leak.

[Shadow]

you can use epoxy glue, but probably not woth to buy new epoxy just for that

[hebi]

you can use epoxy glue, but probably not woth to buy new epoxy just for that

whats that? is it the glue gun kind of thing? i have a glue gun but think rather troublesome to use it. time to make another bottle, hopefully will generate enough pressure to push through limewood at least the algae on the glass is really an eyesore.
edit: ok i know whats that glue, have that too at home haha, those kind need to mix 2 glue together.but is it worth the effort? if really can seal very tight compared to superglue, i dont mind using it. the instruction on the tube made it seems as if its dangerous to use that.

[Shadow]

Yup that is the one, need to mix first. If you have it at home, why don't you use it? it is quite simple. The material used in softdrink bottle is somewhat un glueable. I can't remember the material name and I found only epoxy work with it. You also need to scratch the surface to get better grip.

[hebi]

what do you mean by scratch? so do i glue the screw part of metal thing in or apply the glue at the tiny gap ?

[Shadow]

You are using screw? Can you just tighten it up?

I was thinking that you just drill hole in the bottle cap and slot in the air hose connector.

You can scratch the surface of the bottle using pen knife

[hebi]

ya i using those screw kind. but although can tighten, still got slight leak at the hole there coz when you screw in, the cap will light dent in slightly. do you think epoxy glue can glue plastic and metal together?

[blackghost]

cheapest solution is to use blu tack.. the one used as stationery..

just apply and makes sure there is no holes..

or you can get a tube of silicon, 1 small tube about 4 dollars.. can get from hardware shop or LFS.

cheers

[bossteck]

If you're using a screw-type air tube connector, another cheap solution I can think of is to use those white teflon tape (commonly referred to as white tape or plumbing tape), wrap a few round around your tube connector and screw it back into the bottle cap, should be able to achieve a better seal.

[hebi]

ok. think blu-tac easier to use and cover. what about plastacine? also can right?

[Shadow]

Agreed, if it screw type, just use blu-tac to seal the leak.

By the way where did you get the screw type air tube connector?

[hebi]

C328, all the airstones and equipments there. got think thats the only place got sell this kind in the west side.

[hebi]

sorry asking newbish questions, but yesterday i made another bottle and connect the 2 bottle to a connector, and all my connectors have a 'switch' to airflow. so i thought it will need some time to build up pressure in both bottle for it to push the CO2 into the water. strangely, for my brand new bottle, its already producing CO2 and i have test for signs of leaks but the water level in the tube connected to the main connector is not decreasing. so i decided to 'switch off' the side from the new bottle and just use the old CO2 bottle, which is still producing CO2. now, it can push CO2 out of the bottle, but after maybe a few bubbles, the water level start to rise till halfway then stop, lower than when using the 2 bottles together. why is this so? really strange.