bulkhead question

[zibba]

I'm redoing my plumbing from a used aquarium and when I took out the bulkheads none of the pvc was cemented. Is it suppose to be? When I'm putting it back together should I cement it with pvc glue? I'm new to the whole overflow technique as this is my first saltwater tank.

Thanks.

 

[Dubbin1]

I don't cement the in tank PVC parts, just the outside parts.

 

[EdKruzel]

I never cement the fitting to the bulkhead as I may need to remove it, however you can use a small amount of silicone so that if it needs to be removed it will still easily break loose.

 

[fatdaddy]

Re: bulkhead question

<a href=showthread.php?s=&postid=10291974#post10291974 target=_blank>Originally posted</a> by zibba
I'm redoing my plumbing from a used aquarium and when I took out the bulkheads none of the pvc was cemented.

I bought a house and discovered that the previous owner forgot to cement one of the PVC joints. Big flood. Oddly, it didn't leak in 3 years and with 40 psi, but it did eventually give way.

The silicone sounds like a great idea. Even with the low pressures, I'd be uncomfortable just having friction holding it together. Most of the used equipment I've seen is all cemented.

 

[zibba]

What about for those people who are using the "herbie" method? that is...using a siphon at the overflow. If I don't cement it, will any air get into the overflow?