Return Line Questions

[m109r]

the overflow drain is a single 1.5"

[Ya Dude]

cut it above the surface ,see what happens,if nothing oh well

[fkshiu]

What are you using as an overflow? Drilled? HOB? Are you using a Durso/Stockman or just a plain standpipe? Is it an AGA Megaflow?

[m109r]

good question, it looks like this:

[golf nut]

Raise the drain and reduce the otput of the Dart, once it gets quiet increase the pumps output slowly.

[m109r]

1" above the surface level?

man am I glad I put unions everywhere:



.....i am also planning on doing something with the rats nest....just not today

[m109r]

ok, so I raised the drain to just above the water and presto, drain valve 100% open, and I can get up to 40% on the return valve.

it is a little louder dropping into the sump but not bad

thanks to all

[banditpowdercoat]

Looks like your running a Durso style drain. With the air bleed home on the 1st 90*. I have tried that way too, and didnt like it much. I found using a T, and having the air bleed on the other end of the T performs much better
If you look at the one in the pic here, you will see what I mean

http://www.dursostandpipes.com/

when a Durso air bleed gets pluged, it will surge in and out of a full siphon. Trick with them is to ballance the air bleed with the amount of water it should flow.

[fkshiu]

You don't need to run that much flow through your sump in any event. With your CL you've already got plenty of flow in your display. Using a lower flow return pump will save you a lot of electricity and your skimmer should work better.

[mark]

A single 1.5" is only good for around 1400 gph (see RC drain calculator) and the Dart is probably pushing around 2000gph.

Valve back the output of the pump a bit (can restrict output no problems, but not the input side).