Hello and thank you for your help, We are in the sewer. Our rainwater and wastewater networks are quite distinct. We bought 2 plugs which is called "evacuation membrane aerator in diameter 40". We used a 50/40 reducer because the aerators are 40 and our ev ...

Hello, We have been living in our new house for four months (self-construction) and very occasionally, more precisely when it rains, we have strange phenomena in one of the bathrooms mainly. We have 2 vents of 50mm each and have been wearing hats for less than a month (d ...