Shower leak paths: splash, drain, supply and waterproofing investigation session

Shower leak paths: splash, drain, supply and waterproofing

Change one condition at a time: supply pressure, drain loading, spray location and standing water. Record the delay to the first leak.

Browser-local draftNo session answers are sent to the server. Evidence balanceScores organize observations; they are not probabilities. No repair authorizationStop signals override the ordinary workflow.

Freeze the evidence

Record the condition before interpreting it.

Observed at Weather / equipment / water-use state First visible, audible or measurable change Location, direction and delay

Evidence ledger

Mark what raises or weakens each route.

Leave unknown items unmarked. Contradictory observations are useful evidence.

Pressurized supply or valve leak

A fitting or supply route leaks while the valve is open, even when water does not reach the drain.

Raises fit +2 eachLeaks with drain plugged and spray containedStarts quickly when valve opensMay continue while pressure remains

Lowers fit −2 eachOnly leaks after prolonged drain loading

Notes for this route

Drain body or waste connection leak

Water escapes when the drain or trap receives flow or standing water.

Raises fit +2 eachLeaks when water is poured directly into drainDelay follows drain loadingSpray location does not matter

Lowers fit −2 eachLeaks before water reaches the drain

Notes for this route

Waterproofing transition or splash escape

Water crosses a wall, curb, door or penetration boundary during spray exposure.

Raises fit +2 eachDepends on spray direction or durationAppears at curb or wall transitionDrain-only test stays dry

Lowers fit −2 eachLeaks with supply on and no surface wetting

Notes for this route

Decision points

Change one condition at a time.

An answer changes investigation order; it does not prove a concealed condition.

Does the leak occur with the valve on while water is captured before it reaches surfaces and drain?

YesNoUnknown

If yes: Move pressurized supply components to the front.

If no: Separate drain loading from spray exposure.

Observed answer and evidence

Does a drain-only test reproduce the leak?

YesNoUnknown

If yes: Prioritize drain body, trap and waste connections.

If no: Map spray direction, curb and waterproofing transitions.

Observed answer and evidence

Safety interlock

Stop signals override scoring.

Mark the stop state when any listed boundary is present. Do not create a better clue by increasing exposure.

Stop testing if water approaches lights, wiring or an occupied ceiling cavity.
Do not perform repeated flooding tests that can increase concealed damage.

A stop signal is presentPause ordinary investigation and arrange an appropriate competent or emergency response.Safety note

Current conclusion

Explain what changed the ranking.

Leading pathway and why Strongest competing pathway Evidence still missing Smallest safe next action / handoff

Shower leak paths: splash, drain, supply and waterproofing

Record the condition before interpreting it.

Mark what raises or weakens each route.

Pressurized supply or valve leak

Drain body or waste connection leak

Waterproofing transition or splash escape

Change one condition at a time.

Does the leak occur with the valve on while water is captured before it reaches surfaces and drain?

Does a drain-only test reproduce the leak?

Stop signals override scoring.

Explain what changed the ranking.

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