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sibs · 08-03-2008

In what circumstances would you need either a single or double check valve to prevent backflow?

08-03-2008	#5 (permalink)
sibs Junior Member Join Date: Jan 2008 Posts: 9	Re: Isolating Valves In what circumstances would you need either a single or double check valve to prevent backflow?
sibs Junior Member Join Date: Jan 2008 Posts: 9