One Inlet, Two Pumps, Two Outlets and a Headache

The effect is the same which is to eliminate re-circulation losses

Since this is a waterfall pump would a check valve on the outlet side be able to engage since any reverse flow would be air and not water? If this is an issue then the only solution would be to put the check valve close where it Ts off of the main so there is enough water to pull the check valve. Then again, there is probably enough water on either side of the pump anyway...
 
All check valves have springs so they are normally closed and only open when there is a positive pressure difference between the inlet and outlet of the valve. When the waterfall pump is off, the other pump creates suction so the pressure on the inlet side of the valve is lower than the outlet side of the valve (negative pressure) so the valve remains closed even if there is air on the other side of the valve. This will occur on either side of the pump.
 
cottora said:
Got to be solid advise if from a Clemson man...! You are close enough to the right Orange and right Tigers, AUBURN!
Thank you and I have to admit that if I had to root for an SEC team, it would have to be the Auburn Tigers.

Sounds like an interesting situation you've. Don't forget to update us with your ultimate solution.

GO TIGERS!
 
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