I was going to suggest that whether it is close coupled or not. One way I sometimes detect small leaks is to wrap a couple of sheets of toilet paper around the suspect area and see if it gets damp. Works around radiator valves too.
these days many do.
Useful tip: get a dark coloured christmas hat from a cracker, take a small piece and wrap it in a piece of soft white bogroll. If it gets wet, the colour will run and stain the bogroll.
Cheers
But how many (rented) properties do you see where a constantly dribbling overflow from a horizontal pipe has caused the brickwork to be wet - then stained - then crumbling due to frost. (all for the sake of a tee piece.)
Rednadnerb wrote on 17/02/2017 :
Any possibility this might be appearing from below, as in a tiled floor on concrete, with the water coming up through the tiles?
Sure it's not someone aiming badly?
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