Durso Standpipe

[vinccc2009]

Hi Bro,

Need advise...

I got my tank from a reefer.

It comes with a side overflow compartment with 2 durso standpipe flow the water to the sump below.

Water was return with ok flow.

but the flow down to the durso pipe was very low.

one pipe dont even has any water flowing down

Why?

I played with the 2 cover on top of the tube but nothing will happen.

Whats it wrong?

Does the down flow depend on the return pump?

Previously I was using a stronger pump but its a bit noisy.

So I change to a smaller one and flow the water to the chiller and from chiller return to the main tank.

[CFOh]

Hi Bro,

Need advise...

I got my tank from a reefer.

It comes with a side overflow compartment with 2 durso standpipe flow the water to the sump below.

Water was return with ok flow.

but the flow down to the durso pipe was very low.

one pipe dont even has any water flowing down

Why?

I played with the 2 cover on top of the tube but nothing will happen.

Whats it wrong?

Does the down flow depend on the return pump?

Previously I was using a stronger pump but its a bit noisy.

So I change to a smaller one and flow the water to the chiller and from chiller return to the main tank.

What is your return pump flow rate? the flow in return box suggested ease and might not enough pressure for purge through both return pipe. Pressure is proportional to flow rate.. other than that you can play with height of yr pipe.. Try Torricelli’s Theorem/Bernoulli’s theorem.. Cheers..

[PROX]

your water level not that high to push more water through the weir..i guess that's why you dont get much flow from drain pipe. Maybe need stronger return pump?

[tunicate]

I think Prox is right. Your current return flow is too slow, hence only one durso is more than sufficient to handle, thus the other durso is idling. You should notice that your return pipe is smaller in diameter as compared to overflow piping. This is to ensure that your entire tank don't overflow due to powerful return pump. A 2nd durso gives you added protection from flood in case the 1st durso got stuck for whatever reason.

You're getting less flow from your return since you hook it up to the chiller. Your current flow rate can be measured by checking how much water is flowing down the overflow pipe in 60sec. Then taking that volume & multiple by 60min to get your flow in L/hr.

[vinccc2009]

Thanks bros!

I think i shuld use back my ehiem pump.

[vinccc2009]

True enough, after changing to a more powerful return pump, the water flow increased.

Thanks.

[vinccc2009]

However, I m still not sure how the 2 caps work.

Should I close it tight or leave them open?

I realized if tighten both, the water in the overflow will drop to the bottom n with a toilet flush sound then fill up again..

[tunicate]

I think the caps are meant to adjust your water level in overflow box to minimize water noise. They should not be fully tighten.