On Friday, June 19, 2015 at 3:21:45 PM UTC-4, net cop wrote:
Son of God writes:

Is there anything i can put on the outside to seal this pvc pool pipe
leak? Thanks




Probably, but it will be a hack job.

PVC work is super simple.
Fix it the right way, remove the bad pipe and replace it.

--
Dan Espen

+1

Obviously something was there that kept it sealed for
some period of time. IDK what that even is. The ends
of the pipes look perfect, butted up, not like it cracked.
So, somebody butted it up and put silicone around it?

Solution is to cut out on both sides of that mess, get
a new piece of PVC that bridges it, plus two PVC repair
couplings. Make sure they are repair couplings, not regular.
Regular ones have stops inside so they only go on half way.
With a repair coupling you can slide one all the way on
to each of the pipes, put in the bridge pipe, and slide
the couplings back over. Or alternatively, may be able to
do it easier by removing more of it back to fittings that
are there, etc.