What kind of overflow pipe for the 187?

[FishyFishy!]

So i'm plumbing the 187 tonight, and i'm stuck at the overflow. It only has one 2" drain, so I was thinking durso. Obviously can't do a true herbie. Any thoughts?

[wingedfish]

herbie is possible on a large diameter drain

http://www.reefcentral.com/forums/showthread.php?t=966225

[FishyFishy!]

That is an awesome idea, but lack of pictures for the actual bulkhead side. I can't really see how they would make that work at the bottom.

[kien]

you can (probably) do a true herbie if you are willing to drill :) That is, drill the outside of the tank/overflow for the emergency.

[wingedfish]

use a 2" slip x slip bulkhead. on the bottom you yould use a 1 or 1 1/2x2x2 tee with the the stop sanded or dremeled out of the smaller diameter end.

[FishyFishy!]

There is actually a 1" hole drilled on the other side of the tank (formerly for a return) that I was going to use for a fancy water changer. I suppose I could do an upwards bend and run the pipe just under the euro brace for an emergency. Then just do a standard durso.

[FishyFishy!]

Another random question.... How would a ball valve fair underwater? If I could have an interior valve I could make the water changer and an emergency drain work! haha.

[kien]

it will likely encrust with coraline and other algaes and become a royal pain to use. Not impossible, just troublesome :)

[mark]

herbie is possible on a large diameter drain

http://www.reefcentral.com/forums/showthread.php?t=966225

remember seeing someone had a build like in your link (OM?), neat concept.

[FishyFishy!]

Well the return pumps are plumbed from the sump. Still not sure which way to go on the drain. Good thing I have the next 4 days off work! hehe.

I did mock up an emergency drain using the 1" hole from the former return. I highly doubt it would 100% keep up to the flow from the returns, but least its there. I might just do a durso for now, and see if I like it.