Sealing a 80mm PVC pipe from outside that I missed

mtbotrev, Apr 24, 9:13pm
Hi. dumb question I know but how can I seal a joint of two sections of pipe. I ran a 6m length off a downpipe and then various angles and sections to get to a sump and forgot to seal the inside using Marley welding cement of one section and I cant pull it apart! Can I seal it from outside. or how could I separate it.

I was hurrying at the end and lost sequence and joining marks.

Thanx

happychappy50, Apr 24, 11:51pm
Try running ms or an acrylic adhesive around the joint then a couple of pop rivets so it won’t separate

johotech, Apr 25, 12:03am
Yes, the Marley cement will work on the outside. But if there is any flexing of the pipe, it could break the seal again.

mtbotrev, Apr 25, 10:04am
Thanx for both thoughts. I will do both and reduce pipe flex.

budgel, Nov 20, 7:03pm
If the pipe isnt meant to stay full of water, dont worry about it. It will only leak a little if it is raining anyway.
Downpipes need to have a means of coming apart for flushing, access etc.