Learned something about valves today

[mark]

Originally Posted by untamed

Holy (*^()!

For example....One installed on the output of the return pump needs to be installed with the arrow pointing toward the pump. (which would be AGAINST the direction of flow when it is running)

That's right. On the valves I have, arrow points against the permanent seat.

Also note this valve was not on my closed loop (though I used same valves) but on the return pump from the sump.