Jumbo Plumbing replaced a leaking tub and shower valve at this St. Thomas home. The original cartridge had worn down over time, letting water seep past the seals even with the handle fully closed. We see this pattern often in single-handle setups where mineral buildup accelerates the wear. The fix here wasn't just swapping the cartridge though. The valve body itself showed enough corrosion that a full trim replacement made more sense than piecemeal repairs that might fail again within a year. Our tech installed a professional-grade single-handle tub/shower faucet with quality internals built to handle our hard water. Got a dripping shower valve that never quite shuts off? Book a visit and we'll sort out whether it's a simple cartridge swap or something deeper.