Hi @Noyade I think my property is like 1980s. Fixed by plumber replacing the tee and stand pipe witha a copper one.. Also filled with rock and sand ho ...

lol @MikeTNZ I got what you mean now. It was a garden bed full of weed so we decided to do a clean up. So yeah I further digged it because of old leak ...

Thanks @MikeTNZ , not sure why you said it's unfinished ground? What you said worry me a bit as it's been like this before I moved in few years ago. I ...

Thanks @JDE . I've hired a plumber fixing the leak. Apparently he's replaced the tee and the standing pipe. Hope it's a proper one that doesn't cause ...