N
nekekami
Hello all,I am new here but wanted to ask for some advice regarding a soil pipe issue in my fourth floor flat. First of all, a little bit of background, the flat has two bathrooms (main and es) and each bathroom has its own soil pipe stack. My flat is on the top floor and hence the soil pipe stack in the es goes is vented into the attic space whilst the stack pipe in the main bathroom has an AAV fitted. In all flats the soil pipes are contained within sealed trunking.Recently the push-fit connection to the soil stack for the es waste (basin + shower) failed and resulted in water leaking into the trunking and the flats below. The damage was minmal and the problem was rectified by replacing the push fit seal and reconnecting the waste. The problem is, however, now a loud knocking noise can be heard two floors down coming from the trunking in the ensuite. I have read a lot of the posts on here regarding knocking and noisy soil pipes and used most of the suggested diagnosis to try to figure it out. The problem only happens when hot water goes down the pipe and hence I feel this is likely to be an expansion related problem in the vicinity of the soil pipe in the flat two floors down.Does this sound feasible? If so, what should my next step be? The owner of the flat where the knocking noise is coming from is getting disturbed everytime we use our ensuite and wants us to look for a solution. Do I call a plumber out to confirm my diagnosis? Or do I just get a plasterer out to gain access to the soil pipe, fix whatever is causing the pipe to 'knock' and then to reseal it?I would appreciate any/all advice on this matter.
