Corroded supply line fails suddenly and at full pressure. Knowing where your main shutoff is and that it turns is the difference between a repair and a rebuild.

This is most common in homes built before about 1940. Pre-war construction — galvanized supply, cast iron drains, cloth-wrapped wiring, ungrounded circuits.

Related

• Water under an old house after heavy rain
• Cast iron drain leaking below the floor
• Plaster holding water without showing it
• Damage from a burst pipe in a freeze
• Wet insulation under the floor
• Historic staining nobody has explained
• No shutoff valves at individual fixtures
• Sewer backing up into the lowest fixture

Back to Water Damage.

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Written by Jaylan Jones. I Like To Fix earns a referral fee when a call connects to a contractor. See our business-model disclosure.