leaking wc waste pipe

[craneman]

hello i need some help,the wc upstairs the waste goes through a wall and it runs along the ceiling of the new kitchen extension it is the 4 inch grey pipe on one of the joins which was glued it has a leak,any idea how you can reseal these glued pipes without actually changing the whole lot??

hoping you can help cranrman..

 

[ChrisR]

Dry it, clean it, wipe Polypipe gap-filling pipe solvent around it. Usually works.