Where to buy a co2 check valve?

[corigan]

Sorry if this has already been covered many times up here, but I used the search and never really came up with what I was looking for.

I currently have two of the hagen systems installed on my 55 gallon (I'm thinking about adding a 3rd). Since these don't come with co2 check valves I'm going to try to find a few of em. Right now I haven't had much luck finding anything decent under $35 or so. Since I'm goign to need 2 or 3 of these I would like to find them cheaper. Anybody have any suggestions where to find a good, but cheaper co2 check valve? Thanks.

[ninoboy]

Just use the regular air pump checkvalves (not the metal one). They are only a buck a piece. If you want to save money, why don't you just use the 2L bottle for the DIY CO2. I mean, if you buy 3 Hagen, you might as well add a little more to get the pressurize system. I use two 2L bottles for my 55gl.

[malkore]

yes, buy a normal check valve for $1.50. when the CO2 eventually destroys it in a year or two, replace it for another $1.50.

[anonapersona]

If you hang the Hagen canister on the tank with the hanger that comes with the system, there is no need for any check valve.

[ninoboy]

I would still use it even with HOB hagen. I didn't use it before until couple weeks ago. I unplug the tube from the hagen canister and the water in the line went straight up above the water line (because sudden change of pressure) and started the vacuum effect.

[corigan]

Thanks for the info fellas, I just went out and got some cheap-o plastic ones that I hope don't corrode too quickly, thanks again.