Shower Repair
Every shower problem lives in one of two worlds. The supply world (valve, risers, arm, trim) is pressurized and can leak at three in the morning with nobody showering. The drain world (strainer, trap, pan) only leaks when water is actually flowing through it. One question splits them: does the evidence appear without use, or only with it? That answer, established before anything opens, routes the entire repair.
Signs You Need This Service
The complaint list, sorted by world:
- Dripping after shutoff. Supply world. The valve no longer seals fully, the shower's version of a dripping faucet. Steady dripping from the head hours later confirms it.
- Weak or uneven spray at one shower. Usually the showerhead itself, mineral-plugged, or debris at the valve. One-fixture weakness stays fixture-level; house-wide weakness belongs to the pressure pages.
- Ceiling stain below the bathroom. The ambiguous clue: supply leaks stain on their own schedule, drain-world leaks stain after showers. The stain's timing, not its existence, is the evidence.
- The diverter that half-commits. Water splitting between tub spout and head, or between outlets, is diverter wear, a contained mechanical repair.
- Temperature complaints. Swings and mixing problems point into the valve's internals. Logged here, repaired on the shower valve page where that mechanism gets full treatment.
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This page is the shower's general repair room: spray, temperature, diverters, trim and the two-world diagnosis. The valve's deep internals have a dedicated page for cartridge-level work, drain blockages belong to bathroom drain cleaning, and pan or waterproofing failures cross into their own territory once diagnosis names them. What never happens here: condemning a shower pan off a ceiling stain alone.
How a Plumber Diagnoses the Problem
The two-world test sequence:
- Look without running. Moisture, staining or drips present with the shower unused for hours indict the pressurized side (valve body, risers, arm connections) before any water is deliberately run.
- Run water only into the drain. Water poured directly down the drain without wetting walls tests the trap and drain connection alone. Leakage now convicts the drain world with the pan still unaccused.
- Wet the system in stages. Head running, walls wetted, dam tests where justified: each stage adds one suspect at a time, so the leak's first appearance names its layer.
- Trim and arm checks. The shower arm's wall connection and loose trim let running water behind the surround: small seals with big consequences, checked before anyone discusses demolition.
- Escalate with evidence. Hidden supply leaks route to leak detection's instruments; confirmed pan failures route to remodel-grade work. Each handoff carries test results, not guesses.
Frequently Asked Questions
Why does my shower drip after it's turned off?
The valve's internal seal has worn to the point of letting line pressure seep past. It is a mechanism problem, not a head problem, however much the head is where you see it. Cartridge-level service on the shower valve page is the fix; new heads cure it exactly never.
What causes weak pressure at just one shower?
The fixture, almost always: a mineral-clogged showerhead or debris caught at the valve's inlets, both serviceable without wall work. The thirty-second check is comparing other fixtures: strong everywhere else means this shower's hardware; weak everywhere means the house's pressure pages.
How do you tell a valve leak from a drain or pan leak?
By schedule and staging: valve-side leaks produce evidence without use (pressurized all day); drain-side leaks only during or after water flow. The staged test (dry observation, drain-only pour, then wetting in layers) isolates the world first and the component second. That order is what keeps tile intact.
Does a ceiling stain under the shower mean the pan has failed?
Not by itself. Arms, trim, valve connections and drain joints all stain the same ceiling, and most are far cheaper than a pan. The stain earns the staged diagnosis; the pan gets condemned only when a dam test and the eliminations point at it specifically. Skipping to demolition is the expensive guess.
When does a hidden shower leak need leak detection?
When the staged tests confirm supply-side loss but no accessible point shows it: moisture without a visible author. That is instrument territory. The leak-detection discipline narrows it through the wall before any opening, and the handoff includes this page's test results, so nothing gets re-proven twice.
Split the Shower's Worlds
Describe what you see and when: drips at rest, stains after showers, weak spray, temperature swings. The two-world test sorts it on the first visit, and the repair follows the world that failed.
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