orientation for swing check valve

tbone52

Are there any restriction on the orientation for swing type check valves? Can they be used in the vertical? Mfg spec sheet gives no info on orientation requirements.

Using test in my secondary loops to prevent ghost flow.

EricAune

YES

They are in fact dependent upon gravity for proper operation.  The top of the valve must be up. 

Charlie from wmass

They are not for use to prevent ghost flow

Flow checks are what you need. The weight of the flapper is not enough to prevent gravity or "ghost" flow of the water.