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Flow

Posted: Tue Aug 01, 2006 5:47 am
by LucyInTheSky
I am going to buy a 3/4" QEV and need to have a safty ballvalve in front of it, I was thinking if the flow of the QEV is 7.81Cv and the flow of a 1/2" Ballvalve is 8.053Cv then will I need a 3/4" Ballvalve safty or will it make no difference if I used a 1/2" Ballvalve?

Posted: Tue Aug 01, 2006 12:16 pm
by boilingleadbath
Depends on which ballvalve you get; alot of those 1/2" ballvalves don't have .5" porting. I'd go with the 3/4" ballvalve just so you don't have to buy a bushing.