Hello, I have a leak coming from my waste pipe from back of house but it is no longer connected to anything as I had water tank removed soem months ago and I’m connected to mains. My neighbour is having issues with leaking from her upstairs and I’m worried it’s connected. Can anyone advise what kind of tradesperson I’m looking for - would it be a leak detection service? Two plumbers have no said it’s not coming from my property but I need to fix it. Many thanks
