cement the bulkhead?

[mopar9012]

first time sumper...
My tank is drilled in the back, so Im running a 90 up into the water, no overflow box.
do I need to cement the bulkhead? like on the glass or what? and should I cement the threads of the bulkhead as well?

 

[weaglereefer]

Shouldn't need to, the bulkhead should be sealed on the outlet side either with plumber's tape or if you're using a slip fitting, pvc glue. How are you keeping fish, etc, from going in the overflow? And what size pipe is the overflow? I'd be concerned about the skimming ability of a single pipe.

 

[ster]

No, they are not designed to be cemented.

 

[mopar9012]

au01st;361609 wrote: Shouldn't need to, the bulkhead should be sealed on the outlet side either with plumber's tape or if you're using a slip fitting, pvc glue. How are you keeping fish, etc, from going in the overflow? And what size pipe is the overflow? I'd be concerned about the skimming ability of a single pipe.

its a 90 up, so at the top of the 90 sets the water level, i highly doubt the fish will jump in it, but im sure i can put some type of cover over it.
I know saltwater city runs their fish only tanks with the 90s up.
also I know chris at fish scales has done this too.
The skimmer is a recirculating but im not sure I follow you on why your concerned about the skimmer?

i have a recirculating octopus 110 skimmer and it is a 65 gallon tank and 20 gal sump, if that helps

 

[cr500_af]

mopar9012;361619 wrote: its a 90 up, so at the top of the 90 sets the water level, i highly doubt the fish will jump in it, but im sure i can put some type of cover over it.
I know saltwater city runs their fish only tanks with the 90s up.
also I know chris at fish scales has done this too.
The skimmer is a recirculating but im not sure I follow you on why your concerned about the skimmer?

i have a recirculating octopus 110 skimmer and it is a 65 gallon tank and 20 gal sump, if that helps

I think he was talking about the ability of a single pipe to skim the top layer to send it to the sump, so that your skimmer can skim it.
Clear as mud?

 

[weaglereefer]

Haha, yeah, for example, an internal overflow with the teeth at the top will have 8-12" of linear skimming, whereas a pipe will only have pi*diameter of linear skimming. So unless you're using a 3-4" pipe, it will have less surface skimming ability. Think of like a Calfo coast to coast overflow that runs the width of the tank, you're basically running the opposite. May not be a big deal, but I'm just wondering how efficient it is. If you're running a properly sized return pump, it may allow a layer of film to build on top of the water, inhibiting PAR and oxygen exchange.

 

[mopar9012]

you know Im not sure, considering that this is my first time doing this.
But I do know that Sal, at saltwater city, just recommended one hole and I have posted about this before and everyone seemed to be okay with it...I guess I might have to find out the hard way?:doh:

 

[weaglereefer]

Not saying it won't work, I just don't know and was thinking out loud.