Cartridge and Ceramic Disc Repairs
Most modern faucets use either a cartridge or a ceramic disc valve to control flow and temperature, and both wear out the same way over time: mineral deposits build up on the moving parts until the seal no longer closes cleanly, which shows up as a drip at the spout or a handle that feels gritty when you turn it. We replace the worn cartridge or disc with the correct match for your faucet brand, which usually solves the drip completely rather than just slowing it down.
Because McAllen's water is harder than most, these parts tend to wear out faster here than the manufacturer's typical lifespan would suggest, so a faucet that's dripping again a year or two after the last repair isn't unusual. It's a normal maintenance item for the area rather than a sign anything was done wrong before.