Close Loop Head loss

[untamed]

Originally Posted by Chin_Lee

yes but only as much as from the position of the pump and and the water height in the tank.

I thought that was offset by the head pressure from water height pushing IN on the pump intake?

I would say the head pressure loss due to height would only be the difference in heights between the water height in the tank and the height of delivery to the tank.

CL outputs often enter the tank by going over the top edge...In that case, if you turn the pump off..the water would sit in the output pipes level with the tank surface because head pressure through the pump would push it there even if the pump weren't on. The only pressure the pump works against would be the final few inches or so over the top of the tank.

If you inputs enter the tank below surface level (as mine do), there should be no head pressure loss at all.....due to height.

It would also be typical for the outputs to be smaller dimension pipe and have a lot more elbows etc. I think the elbows would cause a flow reduction...