What would be best overflow system....

[blazej01]

.... with three one inch bulkheads? I was thinking of using two for drain and one for return. What do you guys think?

 

[Flippers4pups]

Tank size? Flow from return? Need more info.

 

[blazej01]

DT 90 with 40 breeder sump. For return pump I have Jebao dc-6000 which is reted at 1500gph.

 

[SloppyJ]

I have a 93g cube with a waveline 6000 for a return. I drilled 3 holes in the bottom back corner of my tank and put an overflow around them. I run a herbie drain and use the 3rd for a return. It's super clean as I don't have any exposed plumbing and quiet as can be. The only other option I would do is a bean animal.

 

[ca1ore]

The 'best' drain system is the three pipe bean animal - hands down! Two pipe Herbie is also very good, provided you size it sensibly. Single drain is a DWTH (can u work out the acronym).

A pump pushing 1,500 gph (less some head loss) is a lot of pump for a 90.

 

[uncleof6]

Well you are not going to get close to 1500 gph, more realistically will be around 900gph or so. Still, this is more than a durso, or dual durso can 'really' handle, so you are left with a siphon drain system.

As far as the overflow/drain system goes, you cannot be a full length C2C with a BA drain system. However, it seems you are stuck in a corner overflow, with three holes that are most likely too close together for a BA system, and it is not a good candidate for a BA to begin with. That leaves you with the 'herbie' modification to fit corner overflows. Do yourself a favor (and your pump) and run the return over the top though, you will get the most from your pump in that fashion, rather than necking it down through a smaller id 1" bulkhead (less than 1".)

 

[blazej01]

For stand pipes for the drain should i use 1" or 1 1/4" pipe?

 

[uncleof6]

For stand pipes for the drain should i use 1" or 1 1/4" pipe?

You don't need anything larger than 1" pipe. Max siphon flow capacity: ~1200gph, with a 24" drop. Going larger to 1.5" will get you up to ~1500gph. Durso is too pathetic to mention at 1"...

 

[SGT_York]

+1 Herbie.

One emergency, one open channel and one siphon line with a gate valve. Run the return behind the tank.

 

[SloppyJ]

If you have extra head room to play with on the return, why not utilize the 3rd bulkhead?

Either way, dual 1" will be fine. My emergency line is set about 1/4" above my tank water level. The siphon is 5" below that with a strainer on the top. Be sure to put a gate valve on the full siphon line. It's been a good setup for me so far.

 

[SGT_York]

I'd always recommend having the third drain as an emergency. It will be too much flow for one 1" pipe alone if the siphon is blocked. (screen is a must, but an overflow lid is much better)

 

[blazej01]

Sounds good guys. Herbe it is. Thanks