Is there a way to install a water trap externally to stop drain smell?
EDIT: Question answered, I'm an idiot.
Strange question and apologies for my terminology.
Here's the issue - in our upstairs bathroom we have a sink (standard with u-bend trap) - this exits into the floor. Half way along, the shower joins the same waste pipe. However there is no 'trap' on the shower (just a shallow filter trap), it just flow straight into the waste pipe.
This goes straight out of the wall and into the stack pipe (from the toilet etc).
So my question is whether there is a way to install a trap externally? There is no way to fit one under the shower without full uninstalling it?
Any help appreciated!