I need a special water valve for a 20 ounce bottle

[JConley]

I have a project I am workin on, and I need a valve that screws on a standard 20 ounce water or soda bottle. The valve needs to allow air to enter the bottle while allowing water out.



Another way of sayign it is... When you squeeze the water out of the bottle, I need something that lets air back in the bottle seperate from the line that the water goes out. Anybody know where to get something like this?



Also does anyone know of a store that sells quick disconnect fittings for a 3/8 inch clear plastic tubing? I struck out at the Home Depot.

 

[PJereb]

That is a weird project.



Is there any reason why you have to use a soda bottle? If you were not dead set on a soda bottle you could just make a bottle out of PVC pipe, and use common slip and NPT fittings. Maybe you could use an old empty fire extinguisher, or something similar. I don’t think you will find anything that will thread onto the threads other than the cap that came with the bottle. You may be able to use a threaded PVC coupler and epoxy that onto the bottle, so at least you have common threads to work with.



The only thing that I have done that was similar was soda bottle rockets.



I used to take a 2 liter bottle and cap, drill a hole in the cap, then pull in an automotive valve stem. Next I would fill up the bottle with water half way, then screw on the cap and pump it up to about 80 psi with a bicycle pump. Then all you had to do was wear leather gloves, hold on to the cap with your right hand, and the bottle with your left, close to you body, and as you moved your arms outward it would twist the cap off, and the bottle would rocket away, leaving you soaked in water, good summer fun.

 

[Elite1]

how about keeping the cap on the bottle and drilling a small hole... . then use drip irrigation valves/ parts.

 

[JConley]

Yes it has to be a soda or watter bottle since that is what I would be buying at a gas station when I am thirsty. I am going to use the bottles to fill a water tank, that is enclosed, and hard to get to. When it comes time to refill the tank, i would screw on the valve that fits on the water bottle and force water into the tank. The tank has a collapsable bladder, and there would be no way to get air into the bottle, thus the need for a one way valve that lets air in, and water out.



John

 

[fbaurley]

You could probably make it work with some sort of check valve.

 

[PJereb]

If you are just filling up a camelback or something similar why don’t you just get a squeeze style hand pump and a bit of hose, just dip the hose into the bottle, then give it a few pumps and away you go. There are neat bulb style pumps for marine applications available.