Posted: Mon Oct 21, 2019 8:52pm
An update to the post I made about black marks on a shower screen, which appeared overnight... The update is also relevant to these posts.
It may come as no surprise that the plumbing arrangements here in Spain are very different to the UK. The way the waste is plumb is that in most cases the shower waste is connected via a T joint (90 deg joint) rather than a 45deg joint (think slip road on to the motorway). This creates an issue in that the shower waste (often applies to the bidet and washbasins also) get some backwash of debris as it passes down the main soil stack.
I physically witnessed this and saw the water gurgle slightly over the plug area of the shower drain.
My response to this, for the unused outlets (showers and bidets mainly), is to remove the drain cover (typically chrome plug arrangement) and seal the underside with clear parcel tape, before replacing it back.
This stops the smells, the backwash and ultimately keep the air free from the bacteria that it must have been spewing out!
Obviously goes without saying that you need to remember to remove the tape if you are going to use the shower or bidet etc.
So, in addition to the u-bend drying out... hence why the smell often goes if you run water, I have found that sealing up this outlet really helps.
The plug hole assembly usually has one fixing screw in the centre and I sued parcel tape but I would think cling film or any other plastic would do the job equally as well.
Not ideal of course, but it is an aid to remedy the problem
Hope it helps!