Not new but noob question about overflow.

[irahmatulla]

I thought this question may be asked, or queried by several people. I have a tank that is drilled. It has bulk heads on it, but I know they are old, and seem "loose". The last thing I want to do is presume they are "tight enough" and end up with a catastrophe. If I were to order some new ones, is the size shown the hole they will cover, or the size of the inside diameter? Next question is, should I get slip x slip, slip x thread, thread x slip ect? I have never plumbed a tank before and am very intimidated. Getting ready to order a Danner 9.5 and don't want to "crap this up." Last question/statement to make sure all the advice I receive is as intact as can be..... My tank is already set up and has been for quite some time, however the over flow has never been.....flowed. I just have my fill line just beneath the teeth. I know this may make for slight complications. I bought the tank used and there is pvc for the drain/return already glued in (and in one broken off) so I am planning on just replacing with new so I know it is clean and "my own." Please any help is welcome!!!!

 

[rdnelson]

As for the size of the bulkhead, it should be the same as the pvc pipe you will be using with it. Therefore, if you are using 3/4" pipe the bulkhead you would buy would also be 3/4". The hole in the glass will be much larger however.

As for slip or thread, the chances of a leak are higher with threaded fittings but they do have the ability to be taken apart at a later date. But, in my opinion, PVC fittings and pipe are relatively cheap. I would sacrafice the abillity to remove in favor of leak free system.

 

[chris s]

If you go to bulk reef supply they have a great assortment and dimensions for each. As Rich said they are sized based on the pipe that they mate with. Just make sure you get the right ones. The ABS are most common. The thicker schedule 80 bulkheads need a larger hole in the glass to fit.

When installing your new bulkheads the gasket goes under the flange then place it through the glass. Spin the nut down until it touches and go 1/4 of a turn more. You really shouldn't need to use tools, hand tight is fine. Over tightening can break glass. Also no silicone or anything on the gasket and no need for teflon tape on the threads for the nut.

 

[irahmatulla]

Wow easier than I thought! Thank you guys!