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I just had a club soda (small bottled one), with a slice of lemon and lime, and it was nice.

I read the ingredients, and it said "carbonated water, potassium phospate, magnesium sulfate, potassium bicarbonate."

Ok, I can do carbonated water, either RO or tap. I can do mag sulfate (epsom salt). However, I have no idea about k phosphate or k bicarbonate.

I read in another thread (can't find it now) about additions for club soda.

Since the club soda out of this little bottle tastes good to me, less "biting" than the homemade version, I have to assume it's my tap water and will start with RO water. That may taste better to my palate.
 
Seriously, don't argue semantics, just do it -
Check valve came today. Just installed. It was cheap, but "High Grade Medical Quality". Good for "no backflow" peace of mind.

seltzer08.jpg
 
As you can see from the photos, I originally didn't use hose clamps on the barbed fittings. After a year I noticed a little drip coming from the rigid ice-maker tubing. I've put hose clamps on all just to be safe.
 
This is a great build. I wonder if there was any way to attach a float valve inline to the gas in port etc, so you wouldn't have to scrap the keg. Additionally, adding a carbonator lid would allow you to have a gas in on the lid, a liquid out and a liquid in(repurposed gas in). Plus you would have the carbonating stone on the bottom making quicker work of the carbonation.

edit: something like this perhaps: http://wholesaler.alibaba.com/product-detail/Long-line-1-Inch-Plastic-Mechanical_1882795015.html
The only issues are its not food safe, and it might be a little too big. Can anyone find something similar?

edit #2:http://www.amazon.com/dp/B008OMKBVO/?tag=skimlinks_replacement-20

this one is food safe and seems reasonably priced, perhaps can configure it to use a ball as in the first link.


Edit #3 (sorry for those subscribed): instead of having gas in become liquid in, you could drill a hole in a lid and add a weldless fitting to attach to float valve in Link 2 using a ball attached to a line (link 1).You can also add a ball lock fitting on top (or any kind of fitting you want). The gas in will have a carbonator stone with a line to the bottom, and the liquid out will remain the same. This way you dont have to screw in a fitting in the inside of a keg, instead you can just use the lid. For the carbonating stone you can attach a small amount of silicone tubing to the gas in. which is simple.
 
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As you can see from the photos, I originally didn't use hose clamps on the barbed fittings. After a year I noticed a little drip coming from the rigid ice-maker tubing. I've put hose clamps on all just to be safe.

How is this setup holding up to time?
 
Oh dear lord change the filter! LOL.

I work in the purified water industry. Not in the residential side, but in the pharmaceutical and health industry.
Most in-line filters like yours are not a depth filter , a physical barrier filter, but are an absorption filter. Usually various types of charcoal. They absorb "nasty" in the water with out clogging up. You could run that filter for 10 years and it wouldn't really affect the flow of water, but it would at best be useless and most likely adding bacteria and other nasty back in to your water. Manufacture's spec on that filter is a 6 month replacement (750 gallons,) but most of those spec are written for a worst case. Still, replacing your filter once a year is a good thing.

Your check valve is a good addition, but that style is pretty cheap can fail quite often. I'd replace that yearly too. You could (should by code?) have a back flow preventer on your feed line if you wanted to be uber safe.

I'll have to keep my wife off of this thread. She'll want me to figure out how to plumb tonic into the fridge.....
 
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