I have had a slow leak develop from where the water supply line goes into the toilet tank.

I went to home depot and replaced the water supply line but I continue to have water drip from where the supply line meets the toilet tank.

Note I only hand tightened ..not sure if I need to get a wrench and tighten some more but from what I was reading it said hand tight should be good enough.

Another thing when the shut off valve is OFF meaning no water running through the supply line, there is NO leak. When the Shut off valve is ON, meaning water is running through the supply line there is a leak. There is no leak from the shut off valve itself. All the water is coming from where the water supply line meets the toilet tank. I don't suspect there is a crack in the tank as there is no leak when the shut off valve is OFF.

Please help ..

thanks,

 

Welcome to the forums

While it certainly is possible to go too tight, I'd try to snug it up a little more and see if that affects how much water leaks

 

Hi,

What type of supply? Flexible or ridgid type?

Also give the nut a snug on the fill valve. These often come loose and drip down onto the supply.

I know your post says it leaks when you turn the valve off, but you never know.

Its the nut directly above the supply nut you are trying to tighten.

Worth a shot...

Mike NJ