Save your CO2 money and buy better Scotch. Pour generously over ice and let
sit a few minutes. Buy one of those Glenn-something single malts and you
won't want soda again.
P.S. -when are you going to finish your boat?
Just silver-braze a Schraeder valve into an empty sparklet, bulb,
cartridge or whatever you call it. Fit a tire-inflator head and
short hose to your CO2 regulator on the big bottle. Set the
regulator to about 50 PSI. or calculate what the pressure would be
when you add 8 grams of CO2 into the free space in your seltzer.
You can then charge the seltzer bottle from the big tank.
I made several strong bottlecaps (machined out of delryn) that fit
1-liter plastic soda bottles. There's a brass disc and a hose washer
inside. A Schraeder valve is brazed into the disc and protrudes thru
a hole in the top. I can then "recharge" my tonic after a gin 'n
tonic and it'll be at "full fizz" next time I want one.
If anyone does this, be sure to drill a hole thru the
next-to-bottommost thread. Then when unscrwing it from a bottle that
still has pressure you hear a warning PSSSSS rather than a "THOCK"
as the cap bounces off your forehead before denting the ceiling.
That really smarts!
I can also make oxygenated water in one of these bottles. Tawk about
live bait with an attitude!
I did something similar, but infinitely simpler. I went to the auto parts
store and bought a set of 4 bolt-on tire valves, then drilled a hole in
a standard 2-liter bottle cap and screwed on the tire valve tightly. It
is very well made of stainless steel and its Schrader valve works perfectly.
This only takes a few minutes and five bucks. I use a tire chuck on a hose
to a regulator on a 20# CO2 bottle, and I charge cold water to near
saturation point in about a minute, shaking constantly.
D> Just silver-braze a Schraeder valve into an empty sparklet, bulb,
My old brass fittings sure look grungy compared to the nice stainless
ones. I actually enjoy making things on a lathe so I still would
make a robust cap that's easy to grab and definitely won't stretch
and blow off under pressure. Now taught, I'd make a stainless disc
and use the stainless Schraeder valve. I'll look for those stainless
valves and make new guts for my bottlecaps if I find them.
Glenn may want to retain the squirt-on-demand feature that a seltzer
bottle offers. I bet he has enough info now to make something
that'll charge his bottle from a larger CO2 tank.
Ordinary blended Scotch 'n soda is not the same drink as 20-year-old
singlemalt taken neat, but no less enjoyable if that's what one
might fancy at a given moment. It's an American drink that can taste
Asking for a wee dram of a good singlemalt over ice in Edinburgh or
Glasgow would have earned a scowl not ten years ago, still does in
neighbourhood pubs. I agree with you that a good singlemalt over ice
is also a very enjoyable drink. Most of the best aged singlemalts
are not exported but there are a few to be found here.
You made the cap, eh? How did you cut the inside threads? Did you have a
spec for them or just improvise from measurements?
Good point about the gas vents on the threads. Point out the interruptions
of the threads on a soda bottle cap to your friends, see how many can
deduce what they're for!
I cut them on a lathe, turning the headstock by hand because it was a
short blind inside thread. I just improvised from measurements.
They're about 8 TPI. I bored the ID to the OD of the unthreaded part
of a bottle (about .980 plus a little) and then just took passes at
the thread until a bottle screwed in easily. It really only takes a
I think I cut a relief zone at the bottom of the hole before
threading, both as clearance for the threading tool and to accept the
hose washer. .
They seal tight. There's a bottle of tonic water in the fridge I
haven't used since last summer but there's no "squeeze" to it so I
know it's still pressurized.
I've occasionally looked for a spec for a long time, but never found one.
Likely it is metric, since the whole PET bottle system is metric. The fit
it very loose and truncated by design, for easy venting if nothing else, so
anything close should do. All you want is for the screw action to press
the tip of the bottle neck into the cap gasket.
Add the CO2 money to the Scotch budget and buy some decent Scotch.
Single malts are nice. Mortlach is a nice one that isn't too pricey.
My hard licour rule is, "If it's worth drinking, it's worth drinking
neat." Scotch and rum at room temperature. Vodka and good Danish snaps
should spend some freezer time before serving. :-)
Hard to argue with that! The only thing I'd do to improve on that advice
is to splash a little water over it as well. I like my scotch a little
weaker, so I can sip it longer and enjoy the flavor that everyone says is an
acquired taste. Guess so, but if so, I acquired mine the very first time
Dr. Tedrow handed me a glass of scotch and water. Loved it immediately.
Quit it, will ya? Sigh!! I used to enjoy it that way, too, but a
bleeding ulcer will cure you of all kinds of things. I now take mine with
water and lots of ice, enjoying the flavor and not taunting the old ulcer
condition, something that seems to have a terrific memory. It still
hasn't forgiven me.
This is a common homebrewing item these days, if you want to save yourself
the time (yeah, yeah, I know, its a budget thing!) you can buy them at any
well stocked homebrewing supply store. It is a *great* way to share 2L of
your latest batch with a friend who doesn't have a Co2 system at home, and
you don't want to bother with bottling.