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[PSUBS-MAILIST] Ballast Valves
Title: Re: [PSUBS-MAILIST] Mini Nautilus Minisub
I have 
been looking for suitable Valves for the ballast tanks, and the co2 ballast 
filling tanks, and piping, and didn't know what is the best material to use for 
this, what have most of you used for this?
 
 
-Graham K