Hi all.
I've noticed recently my toilet has been making a quiet sound of water refilling, even when full.
After a flush and a full refill of water into the cistern (loud) the unit makes the sound it does when refilling, but more quietly.
I take the lid off the cistern and the black plastic pump thingy inside sounds like its passing water or something, just queitly though, I cant put my finger on it.
Any ideas anyone?