How to Replace a Main Shutoff Valve | Ask This Old House

Name: How to Replace a Main Shutoff Valve | Ask This Old House
Uploaded: 2026-07-02T00:00:00+00:00
Duration: 5 min
Description: This Old House walks through locating, operating and replacing the main water shutoff valve — the most important emergency skill for limiting water damage.

This Old House walks through locating, operating and replacing the main water shutoff valve — the most important emergency skill for limiting water damage.

How to Replace a Main Shutoff Valve | Ask This Old House — This Old House walks through locating, operating and replacing the main water shutoff valve — the most important emergency skill for limiting water damage. Read the full guide →

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This video accompanies our full written guide — step-by-step detail, costs, and the decisions the video can only summarize: read the guide.