How do you make a siphon faster?

Kreper3

Kreper3

Uegistered Rser
May 7, 2007
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I have a new sump and pump etc... but the siphon tube into the drain cant seem to keep up with the return pump, the pump gal/hr and 1" pvc tube should be compatable, i am just wondering if there is a way to get the siphon flow a little quicker....

Anybody have tricks or clever adjustments?

kre
 
lower the sump, or raise the tank is one way.


There's going to be no way to equalize this without custom making tubing.

Your best bet will be to install a ball valve on the return (after the pump) so you can restrict its flow and thus make it equal.


My FW mini-sump required me to limit the siphon's flow. However, when designing it, I also installed a ball valve on the pump's exit in the case that the siphon couldn't keep up with the pump
 
i think a ball valve is a good choice, im going to probably put one in to prevent backflow anyhew...slow the pump return instead of speeding up the siphon, its worth a try imo maybe i could put 2 on there if it would help lol .. thanks man
 
Doing this could stress the pump..
I would install a Tee in the return line, then put the ball valve on the portion comming off the Tee, run some plumbing after the ball valve back to your sump.
Basically, youll create a controlled leak, this way the pump doesnt have try to force the same ammount of water through a smaller hole...
(doeas this make sense?)
 
Yeah, your drain to the sump should not syphon, it should just drain freely. If it doesn't have enough flow to keep up with the pump, you either need a smaller pump or a larger/multiple drain.
 
7faces said:
Doing this could stress the pump..

(doeas this make sense?)
Click to expand...

No.

Restricting any aquarium pump's output does not stress it. In fact it reduces the pump load substantially. So DO NOT be concerned about needing to restrict the outlet.

However: Don't completely block it! And don't restrict the inlet.
 
kcress said:
No.

Restricting any aquarium pump's output does not stress it. In fact it reduces the pump load substantially. So DO NOT be concerned about needing to restrict the outlet.

However: Don't completely block it! And don't restrict the inlet.
Click to expand...


it's essentially increasing the head pressure so it will add load to the pump. It's probably rather insignificant, but a simple bypass with a valve would help. I also have something like that on my sump
 
No, IT REDUCES THE LOAD ON THE PUMP!!!

You have it all wrong.

A centrifugal pump is designed to move material. That is how it uses the energy it consumes - by moving material, flow. Massflow to be precise. If you restrict a pump's outlet you reduce the flow. You reduce the power consumption. PERIOD.

It does not harm the pump in ANY way. It reduces the load on the pump. It reduces the cost of operating the pump. It reduces the pump's operating temperature. It increases the pump's lifetime.

Please do not continue to push this ridiculous and mistaken theory. It is rampant in aquaria forums and completely WRONG.

It causes the pump to speed up as it is doing LESS work. This often causes it to sound louder. This makes you think it's working harder. This is utterly and totally wrong. Its able to spin faster because it is doing less.
 
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