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Old 11-18-2013, 01:30 PM   #1
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Hand-tighten bulkheads only?

Never had a drilled tank before and getting ready to attach the bulkheads. Do I just hand-tighten, or should I use silicon or anything as well to seal it?
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Old 11-18-2013, 02:11 PM   #2
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Silicone.
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Old 11-18-2013, 03:42 PM   #3
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i personally wouldnt use silicone on bulkheads. sure it seals great and usually holds tight for a good while, but it can cause a huge pain if you ever need to remove those bulkheads for whatever reason. the bulkheads should of come with a rubber gasket that would go on the wet side to help seal it. i apply a thin layer of vasoline to the gasket before tightening. also you can use a wrench to tighten the bulkheads, just take extra care not to overtighten them.
jspeak- not trying to say that silicone is wrong in this instance, just think it causes a mess. IMO
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Old 11-18-2013, 04:11 PM   #4
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Quote:
Originally Posted by huma-huma View Post
i personally wouldnt use silicone on bulkheads. sure it seals great and usually holds tight for a good while, but it can cause a huge pain if you ever need to remove those bulkheads for whatever reason. the bulkheads should of come with a rubber gasket that would go on the wet side to help seal it. i apply a thin layer of vasoline to the gasket before tightening. also you can use a wrench to tighten the bulkheads, just take extra care not to overtighten them.
jspeak- not trying to say that silicone is wrong in this instance, just think it causes a mess. IMO
I've not yet made a reef tank, I've made plenty of water systems in a house, silicone was used in all cases. WC overflow, loft storage tank, plug holes, central heating, bath surrounds, sinks etc. Anywhere that needs to be watertight. I just applied the same principle. Fibre washers often fail at great cost to the home owner.

P.s. I'm a belt and braces kind of guy

I would fit a straight connector outside the box with compression fittings, these can have a stop end installed to close off pipe as required.
This would also allow it to be de-mountable.

That's my reason. I mean no offence.
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Old 11-19-2013, 12:08 AM   #5
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Thank you for the advice. I will have to take it apart eventually, so I'll try no silicone first. If it leaks, silicone it is.
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Old 11-19-2013, 12:21 AM   #6
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IMO hand tighten plus a quarter turn. Goof luck!
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Old 11-25-2013, 05:04 PM   #7
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Well hand tightening isn't working so far. Leaking like a sieve out of both holes. Letting the rest of the water leak out then trying again. Hope they were just crooked. I'll try again, then get some silicone if it won't hold.
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Old 11-25-2013, 05:40 PM   #8
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dumb question but are you sure you have the rubber gasket on the inside of the tank?
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ever see someone cut a 125g in half??
https://www.aquariumadvice.com/forums...-286438-4.html
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Old 11-25-2013, 06:42 PM   #9
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It is. I don't think I tightened it enough so going to let it dry a bit and try again. Thanks for the heads up.
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Old 11-25-2013, 07:22 PM   #10
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Keep at it, you'll get it. I just had to remove the entire plumbing in one of my overflows due to two chromis that found there way in there. lol It leaked and leaked, actually had to try again the next day but we got it tight enough. As tight as you can get it by hand and then like said above maybe another half or quarter turn.
Good luck!
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Old 11-25-2013, 07:30 PM   #11
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Not silicone caulk...silicone lubricant.
DOW 111 - O-Ring Lubricant - Bulk Reef Supply

There is no need to caulk your bulkheads. 100% silicone lubricant will seal and allow you to unscrew them if need be.
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Old 11-25-2013, 07:38 PM   #12
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Not silicone caulk...silicone lubricant.
DOW 111 - O-Ring Lubricant - Bulk Reef Supply

There is no need to caulk your bulkheads. 100% silicone lubricant will seal and allow you to unscrew them if need be.
wish i woulda seent his when doing mine....smh would have saved me quite a few bucks. (4 bulkheads total)
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ever see someone cut a 125g in half??
https://www.aquariumadvice.com/forums...-286438-4.html
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Old 11-26-2013, 02:43 PM   #13
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Thank you for that!! Well I finally got the bulkhead off. It wouldn't unscrew even with a pipe wrench. Didn't know my own strength... Haha. I wound up cutting the darn thing off, which was miserable considering the right space of a stand and working in a corner. But it's done. Time to clean up and get a new bulkhead. And some silicone lubricant. Thanks again for that info.

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Old 11-26-2013, 03:11 PM   #14
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i feel your pain. i feel it. had to cut 2 off myself
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ever see someone cut a 125g in half??
https://www.aquariumadvice.com/forums...-286438-4.html
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Old 11-26-2013, 05:21 PM   #15
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No thanks; one was bad enough. Curious how you did it. I used a Dremel (not recommended) and was able to get section off so I could get the rest off. Melting plastic isn't the best option with the Dremel I wouldn't think, but nothing else I tried was working. That's why I'm asking in case it occurs again.
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Old 11-26-2013, 05:29 PM   #16
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It won't occur again if you use the lubricant.
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Old 11-26-2013, 05:39 PM   #17
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It won't occur again if you use the lubricant.
LOL too true.
in my case, i used a mini hacksaw. fit in there just enough to make the cuts. i will be the first to say though that i busted my knuckles and cursed the tank several times.
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Old 11-26-2013, 06:07 PM   #18
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I did some cursing too, but no bloody knuckles. Just melted plastic fumes, which will be worse long term.. Haha. I bought some silicone lubricant. If this isn't good, let me know. lowe's didn't have any bulkheads, so I'll have to order online anyway.

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Old 11-26-2013, 06:11 PM   #19
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I would be afraid to use that in my tank. 100% silicone is what i would use.
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Old 11-26-2013, 06:19 PM   #20
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Thank you for the quick reply. I'll check online.
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