I have a smell of sewage in my bathrooms which I cannot get rid of. I called out Dyno Rod thinking that I must have a blocked drain but they said the drains were fine. They suggested that I might have a faulty stack pipe valve. Do you think that this could be the problem? The house is only 18 months old so do you think that the builders should put this right? If not can you let me have details of a company I could use who will be able to deal with this problem efficiently and not too expensive? I live in Norwich, Norfolk.
