PVC piping and drying time

[nseawater]

Question, how long does it take for the cement glue used for pvc to dry and safe to use for your tank? The reason why I'm asking is because my overflow bulkhead is leaking and would like to switch to pvc for drain and return.

 

[username in use]

Ideally, you'd let it sit for 24hrs or at least overnight. In practice I have started things up after an hour on my tanks when absolutely needed. If you can avoid that quick then you should. Powerheads will keep your tank happy overnight.

When plumbing pools Ive started systems up after 5 minutes and they haven't leaked or come apart. It sets surprisingly fast. The issue really is with the off gassing of the glues.

 

[ca1ore]

I've glued pvc countless times and only waited a few minutes for the plastic to weld. I do, however, wrap a piece of masking tape around the end of the pipe while spplying the glue to ensure none gets squeezed inside the pipe. Once the glue is applied, remove the tape and assemble the parts.

 

[moatdaddy]

i glue, wait a minute then try to ply it apart. it has never given, pvc glue is almost instant imo. I then rinse the some fresh water or extra saltwater before hook up.

 

[CafeReef]

I've glued pvc countless times and only waited a few minutes for the plastic to weld. I do, however, wrap a piece of masking tape around the end of the pipe while spplying the glue to ensure none gets squeezed inside the pipe. Once the glue is applied, remove the tape and assemble the parts.

sorry if this is dumb, but how do you do this?

if the tape is around the end of the pipe, and you take the tape off once glued and slid together, how do you get the tape out of the inside of the pipe? and wouldnt the tape get in the way of the cement?

 

[username in use]

He pulls the tape off before sliding the pieces together. It's his way of keeping glue off of the very end of the pipe.

 

[ca1ore]

Right, I only cover the last 1/4" or so of the pipe, apply the glue, remove the tape and then assemble the pieces. Whether it's really necessary, I cannot say for sure. All I know is that I have been doing it that way for two decades, have not poisoned the tank and have had no joints fail.

 

[nseawater]

Thanks all.

 

[Bent]

In a pinch I've used them a few minutes after glueing with no problem.