Oh I am SOOOO frustrated!!!

[i have crabs]

what side was the washer on

really though, was there a washer on the flange side? some flanges are not flat and have a little plastic ring that sticks up and have been blamed for cracking tanks when no washer is on them

[untamed]

Sounds like an opportunity to make your new sump out of acrylic.

[Myka]

Too expensive for my blood untamed! But it would be nice.

I did check the nut i have crabs, and there were no rough edges, just a washer on the flange side.

walloutlet, my tank is definitely done when the plumbing is done!! I don't normally redo any plumbing unless it leaks. LOL I loathe plumbing.

[Doug]

I have always used some silicone on mine. Not on the gasket side though. I put some on the threaded side, which is the outside in my case usually. This gives me an extra seal on that side. I usually then put a bead around the outside of the gasket/bulkhead, after its been tightened. I have only ever hand tightened.

Agreed its a pain when one needs removing, but on a tank whens that?? Your sump is perhaps a different story though, but I would still do it the same if it was mine.

Never have had a leak that way in 25 yrs. So far.

[fishoholic]

That sucks, I would try using some silicone next time around.

[banditpowdercoat]

Thin glass and bulkheads are tricky. To tight and snap. Silicone is your friend on smaller tanks. My 10g sump, I cracked the whole side too. I managed to silicone a glass patch cross the crack, and it has held up so far.

[mark]

Sorry to hear about the crack but trying to understand how.

If the flange and the nut is fully supported by the glass (correct hole size for the bulkhead) and faces are smooth, would think when tightening, the plastic threads would strip before you could get enough compression to shatter the glass.