This might sound stupid but I've just changed the diaphragm in the toilet as it was hissing and not filling for a long time.
The toilet flushes great and only takes about 20-30 seconds to fill now, but at the end it makes a quick hiss sound.
I'm assuming this is probably the valve closing fast and that's the sound of the water flowing through but I just wanted to double check that there isn't something else wrong.
Is this normal?
Best Answer
Once the tank gets close to full the hiss is the water being restricted until the valve closes and is normal.