Durso - water up and down, up and down. Help?

[Gonzo]

I am setting up my 57 gallon rimless and the water in my overflow chamber with durso pipemplumbing goes up, and down, up and down. Video:

http://www.youtube.com/watch?v=GduOURg9Fsg&sns=em

I'm running a mag 9.5 into a 3/4 inch return inlet with a 1.25 outlet into the sump. Both flexible tubing. The tube running into the sump was about 6 inches under water, which I thought was the problem, so it now only goes 1.5 inches below water level. Still no luck.

Help?

 

[tuberider]

Do you have any 90ºs on the drain plumbing?

 

[Gonzo]

No 90s. Straight vertical drop into sump.

 

[tuberider]

You can either open up the hole at the top of the durso, or throttle back the pump, the latter being a safer bet.

That looks to me to be a "Mega-Flow" durso which means that it is really a 1" drain, a Mag 9.5 is a little too powerful for that setup, if you can throttle the pump back or build a manifold to run reactors or a fuge (again the latter being a better appropriation of energy) it should stop flushing.

 

[Gonzo]

So I shoukd build a pvc T unit from the mag where the run off goes back into the sump? Ball valve PVC?

 

[sfboarders]

I like gate valve myself for fine tuning.

 

[tuberider]

You can just put a ball/gate valve on the return, or trade for a smaller pump, 9.5s generate a lot of heat and if you're not utilizing all of the energy it really doesn't make sense.

 

[Gonzo]

I threw away the box last night |( So looks like I'm gonna have to use a gate valve.

Thanks for the help Jeremy and J!

 

[newhobby]

I have the same tank and I changed the durso because I was getting too much noise from it.
I'm using one DIY gurgle buster: http://home.everestkc.net/jrobertson57268/HGB/
I also reduced the pump to avoid wasted energy or using a T.
I think the combination produced much better results and way much less noise.

 

[rygh]

Note that throttling back a magnetic drive pump does reduce the power used quite a bit,
so don't worry too much about going to a smaller pump.

 

[Gonzo]

I'm going to have to T it up because I threw away the original box, thus no returning it. Oh well. I blame my girlflriend, she tosses EVERYTHING, and thus makes me toss all my stuff too.