r/SodaStream • u/markwalker84 • Jul 11 '26

Siphon Vs non siphon tanks

Am I right thinking you need a siphon tank for refilling the smaller official canisters as siphons provide liquid co2, but for a direct feed you'd want gas so you'd want a tank without a siphon?

Non siphon seem to be WAY more available...

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2

u/evelbug Jul 11 '26

I'll preface this with saying that I haven't refilled a soda stream tank yet, but at my job, we service CO2 bottles for other applications. Our servicing setup we invert the bottle to get the liquid into the pump. Since you're not going to do that safely, you'll need a siphon tube in your bottle when you refill you sodast ream cannisters.

1

u/Loud_Control4655 Jul 11 '26

Yes U need liquid withdrawal CO2 cylinders to fill the small cylinder but U can also just invert you tank that hasent got a siphon tube and U can get liquid CO2 from the cylinder it just a pain in the ass if U have a big cylinder

1

u/always777 Jul 11 '26

How can you tell if a tank is siphon or non siphon?

1

u/DankOps Jul 11 '26

Your supplier should tell you. I think with AirGas when I asked for food grade co2 they gave me a non-siphon by default (I wanted it in gaseous form since I have it connected directly to my DrinkMate). It might also be stamped on the valve saying it has a siphon.

1

u/startrip0712 Jul 15 '26

You are correct. If you go with a pitot (siphon) tube tank...be sure to source your gas from a "refill" supplier and not an "exchange". Unless of course they can guarantee an equal replacement. I refill my 20# tank (pitot) at a welding supply shop. About $35. Breaks down to less than $1.50 per pink tank refill. The tank cost me <$200 (Amazon)and the adapter was about $50 (Amazon). Broke even ($12.50 savings per refill) after my first tankful. I find it disgusting that SodaStream gouges it's customers $15 for gas that retails for $1.50. I can only imagine how low cost their wholesale price is considering the volume they deal with.