Headloss calculation

[lomeli562]

I was wondering when accounting for headloss do you start at the pump or at the water line?

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[Mebbid]

That's a good question. I'm wondering that myself.

 

[coralbandit]

Since water finds its own level I would guess the water level.
I would also guess the difference from pump to waterlevel is less head loss then 1 90 degree elbow(1 foot)?

 

[jrc0528]

If both ends of the hose/pipe are submerged, the calculation is water level to water level. For canisters this means that the head loss is actually ZERO since both the suction & return lines are submerged and the canister itself is sealed.

The pump end is always calculated from the water level of it's container (pumps/intakes are always submerged, obviously). If the other end is not submerged than the calculation is to the end of the hose/pipe.

 

[lomeli562]

Alright awesome thanks everyone for the comments

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[Mebbid]

If both ends of the hose/pipe are submerged, the calculation is water level to water level. For canisters this means that the head loss is actually ZERO since both the suction & return lines are submerged and the canister itself is sealed.

The pump end is always calculated from the water level of it's container (pumps/intakes are always submerged, obviously). If the other end is not submerged than the calculation is to the end of the hose/pipe.

That makes sense and goes along with what i was thinking.