Start with the policy and the plumbing
Ask the insurance agent whether the policy has water-shutoff, inspection, or unoccupancy requirements. Then ask a licensed plumber how the home's main valve, water heater, recirculation system, fire sprinklers, irrigation, pool fill, filtration, and softener interact.
The correct plan may be a manual shutoff, an automatic monitored valve, selective fixture shutoffs, or leaving the main supply on because another protected system requires it. Do not guess from a generic checklist.
Reduce the common points of failure
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Replace aging or visibly damaged washing-machine, dishwasher, refrigerator, and toilet supply lines.
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Check under sinks and around water heaters for corrosion, staining, or slow drips.
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Test leak sensors and confirm who receives their alerts.
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Label the main valve and make sure the local responder can reach and operate it.
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Document the chosen water plan in the departure report.
Pair prevention with inspection
A valve does not protect against every roof, drain, HVAC, pool, irrigation, or groundwater problem. Physical visits remain important because they can catch moisture sources that a plumbing sensor never sees.
Sources and scope
This original guide combines Safe Nest Home Watch field experience with the references below. It is general planning information, not insurance, legal, engineering, mold-assessment, or contractor advice. Follow your policy, licensed professionals, equipment instructions, and local requirements.