The ball very seldom is the problem it is the springs and cap washers
Have you got two single faucets or a single lever faucet? It could be a pressure imbalance or it could just need maintenance
It means that you should sell your home and move far away! No jk If its your faucet that is dripping I think in time your faucet needs repaired or replaced because if it drips only when you run water at another fixture (faucet) and doesn't drip if you have everything off then you have a strange faucet but its most likely caused by water hammer (sudden stop of water flow) and if you don't think its cause by that then it also could be from water pressure which when you turn on another faucet and the pressure drops a little and from the drop of pressure and it vibrates your seal in your faucet which could make it drip but very rare but possible.
The faucet drips even when the water is turned off.
The cast of A Faucet Drips - 2011 includes: Merissa Kittleson as Waitress Zach McClellan as Guy
Faucet Drips or Leaks-- General Faucets are used so much that it
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The water is probably collecting in the shower head until there is enough to overflow which would cause it to drip faster for a bit and then go back to a steady rate.
That is nearly 2 gallons an hour - time to fix that faucet
20 days
Did you flush out the valve body prior to installing the new cartridge
You can change the seals on your shower to ensure that you don't have a leak. You can also make sure that your fixtures are firmly attached to the shower head.
Does the shower drip constantly over a period of 4-5 hours, if not, it's water holding in the shower head which has a water saving feature that holds water in the head. If it drips constantly, you'll need to change your seals on your stems. It's fairly simple if you have the correct tools.