Do canister filters lose flow with head?

[fhawk362]

id have to disagree...

if you fill a tube up with water and put each end in the tank there is no flow in or out.. meaning there is no actual work being done on the water from gravity..

a canister is just a large tube with a pump..

keeping it in a vacuumed state would allow for the water level in the outflow tube to sit at the tank's water level with everything turned off.. try with a sump and you see that all the water in the tube goes straight down into the sump ( as it should )

I'm not really sure what you're getting at

 

[Fishermoe14]

since there is no actual extra work for a canister pump to pump water back up to the waterline i dont see how there would be a loss with head height... the only extra strain on the pump in a canister would be from the resistance from the extra tubing..

 

[I<3fish]

since there is no actual extra work for a pump to pump back up to the waterline i dont see how there would be a loss with head height... the only extra strain on the pump in a canister would be from the resistance from the extra tubing..

It still has to compete with gravity, vacumed or not... Plus you have to prime canisters-SIPHON! There is definitely still loss with head height with a canister. Not only because of the length of hose, but because water will still back siphon into the canister.

 

[fhawk362]

It still has to compete with gravity, vacumed or not... Plus you have to prime canisters-SIPHON! There is definitely still loss with head height with a canister. Not only because of the length of hose, but because water will still back siphon into the canister.

Yea, thats what id figure, id like to see some charts of head loss

 

[black056mtc]

get a 600 gph pump connect a hose to it and ran it from your back yard into the house and try to fill up your tank at 5 feet high.
get that same pump and try to fill up same tank from the floor next to that tank

after that you should know the answer to "head loss". that's apply to all pump canister or not. a pump is to push water from A to B, and its only works for what's its capable of.

 

[fhawk362]

I would like to know, im sure its something but how much, because when people mention turnover rates they use what their canister is rated at yet do the math for the head flow with sump pumps.

 

[fhawk362]

get a 600 gph pump connect a hose to it and ran it from your back yard into the house and try to fill up your tank at 5 feet high.
get that same pump and try to fill up same tank from the floor next to that tank

after that you should know the answer to "head loss". that's apply to all pump canister or not. a pump is to push water from A to B, and its only works for what's its capable of.

true but thats more work than finding a chart lol.

 

[fhawk362]

sorry i misinterpreted that, I understand head loss, just curious as if it applied differently to canisters and sump pumps, I know it differs between sump pumps and powerheads

 

[black056mtc]

sorry i misinterpreted that, I understand head loss, just curious as if it applied differently to canisters and sump pumps, I know it differs between sump pumps and powerheads

canister works by
1- pump push water out of the canister up the hose into the tank
2- that create a void so that make room for water from the tank to drain down by gravity

head loss
most pump is rated at 0 ft. thats water's in and out nothing else attached to it. at a certain height the weight of the water make it harder for the pump to push.. its all different pump from pump. then if there is a turn the water has to take then more head loss will be added.

 

[black056mtc]

in my case, a 1600 gph pump, push a 3/4" pipe of water up 5 feet high, comes to a T, then a 90 deg turn, that's left me with +/- 1000 gph.