Re: Cheap CO2 valve?

[Mike McKenzie <mickey3@intergate.ca>]

Just go to your local plumbing store and get the guy to provide the right 
reducing fittings to get the job done...he should have everything you need 
in stock.

At 01:57 PM 5/26/00 +0100, you wrote:
>I'm sending this to the Plants list as well, so apologies to those who
>receive this twice.
>I've recently been installing an automatic CO2 system using a Tunze pH
>controller. The price of the pH controller was very reasonable but I was
>alarmed to see th price of the valve. The Tunze valve was 16,000 pts
>(approx. $75), I then talked to various people and found that there
>isn't very much variation in price on these valves:(. Sooooo, I had a
>look around my local hardware store and found that normal electro-valves
>cost around 6,000 pts ($30), better, but still no cigar considering the
>basically simple design requirements.
>I was, a little later, browsing through the garden section on my way to
>buying some peat when I came across Rainbird irrigation valves. Guess
>what? they're 3,000pts ($18). Admittedly they have a bore of 3/4" but I
>reccon that I can use an end cap in the input/output bores, drill the
>end caps to allow insertion of the CO2 tube, use silicone to install the
>tube and there you have it, an electrically-controlled gas valve for
>justb over $18. I had a look at the internals and they're all coated in
>plastic so there shouldn't be any problem with corrosion or interaction
>with the CO2. I'll need a transformer to supply the 24v current needed
>but this won't cost too much. Has anyone tried this route? I'd be very
>grateful for any info. that anybody has.
>Colin
>
>
>
>
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