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Nice job on drilling the holes. Just to make sure you know, the bulkheads work better if turned around so the nut and threads are on the outside of the tank.

Yeah I know ;) Was just checking the fit and for the picture op! But while I'm here, when the bulkhead gets installed, the gasket is the only seal for them right? No silicone or Teflon tape, right? I know gasket on the inside.

Normally nothing but the gasket. I have used 3M Marine Sealant on old reused gaskets to get a good seal but that is not the norm.

Nice job. I was really nervous the first time I tried to drill. As you probably learned, just take your time, let the drill do the work, and lots of water!

 

re: bulkheads.

like coral hind said, normally nothing. Don't forget to only hand tighten, I've heard stories of folks cracking their glass using wrenches and over tightening. Like most everything, moderation is key! When is the leak test?

Don't forget to only hand tighten, I've heard stories of folks cracking their glass using wrenches and over tightening. Like most everything, moderation is key!

I like to hand tighten and then wrench it down a 1/4 turn. Not everyone's "hand tight" is the same. Since these four bulk heads are up high there will be little water pressure on them. Just remember, anything past tight, is broke.

Leak test will be occurring after the painting of the back. Hopefully I can get that done by next weekend.

Nice work, I'm a week or so from drilling my tank, I tried on a piece of scrap glass and it went surprisingly well, may even drill my 90 that I'm upgrading before I sell it 

Nice job on drilling the holes. Just to make sure you know, the bulkheads work better if turned around so the nut and threads are on the outside of the tank.

Well, not necessarily. Just make sure that the gasket is on the FLANGE side (not the nut side), regardless if it's inside or outside the tank and you'll be fine.

Well, not necessarily. Just make sure that the gasket is on the FLANGE side (not the nut side), regardless if it's inside or outside the tank and you'll be fine.

Sure, it can be made water tight that way. However, I would not inform the general group that it is fine to install the bulkhead that way as the pressure is then moved from the flange to the threads and nut whick is much weaker and known to crack and fail.

Another quick question- would it be wise to do all the plumbing prior to installing the overflow box or doesit matter?

Another quick question- would it be wise to do all the plumbing prior to installing the overflow box or doesit matter?

 

IMO it shouldn't matter, unless you want to move your tank around. It might be a little cumbersome trying to lay a tank flat to put an overflow box on with pipes out the back. I dry fit everything before I plumbed (but I also had a RR tank) I made sure I was happy with it first before it all became real deal.

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