Leak from threads. What to do?

[randomfishdude]

Hey guys.
I'm currently upgrading to a slightly bigger tank. I put some water in the overflow box to test it for leaks and there is a leak coming from my return lines. Only at the threads where the white part go into the black part.
All the pipes are glued alrety so I can't disassemble.
Any solutions?
The return lines are the outer 2 and you can see the ring of water.

 

[randomfishdude]

.

 

[mfinn]

If the leak is at the glued seam, then you are screwed.
I have never heard of a repair that can be done in a glued seam, especially on the return ( pressurized ) line.
I saw a thread a while back where someone was able separate glued fittings, but not sure how effective it was or if it could be done in tight quarters.

 

[mfinn]

If the leak is coming down from above ( the overflow box holes) then maybe trying to tighten the bulkhead nut a little more.
Make sure the gasket is on the water side.

 

[dadnjesse]

It looks like the two outer Bulkheads are threaded. Did you use thread sealant or teflon tape on those?

 

[randomfishdude]

It looks like the two outer Bulkheads are threaded. Did you use thread sealant or teflon tape on those?

No, but i just put some on so I'll see.

 

[Snoopy 67]

Thread Sealant is the PREFERRED way.

 

[mfinn]

It looks like the two outer Bulkheads are threaded. Did you use thread sealant or teflon tape on those?

I thought he said everything was glued?

 

[Indymann99]

I thought he said everything was glued?

With some effort (I would think considerable) he could loosen the 2 (threaded) bulkheads remove from the top (inside overflow) and add sealant and re-thread…. This is exactly why I dont use threaded bulkheads anymore. I recommend glued slip Bulkheads.

 

[KrisReef]

I’m going to grab another beer. It won’t stop those threads from leaking but it’s going to help me feel better.

 

[randomfishdude]

Well I got the tank up and running. I got the leak to the occasional drip. Luckily it all just drips right back into the sump.
I can also say that I have now had all 3 types of filter. Canister, aio and sump.