
Burst Pipe
Close the main valve at the meter first, because a split line in a Pennsylvania row home drains through the floors long before it drains out of the house.
When this becomes an emergency
- Water running down a party wall from somewhere above the ceiling line.
- A loud knock followed by a steady rush behind old plaster.
- Basement stairs wet at the treads with nothing spilled upstairs.
- A supply line frosted white at one spot and dripping at another.
What a pro does
Finding the split is the hard part in this housing stock. Plenty of homes around Philadelphia, Reading and Wilkes-Barre run supply lines up an interior chase between two party walls, so water that appears in a first-floor ceiling can be coming from a burst two storeys higher. The plumber kills the main, drains the system down, then works out where the pipe actually runs before opening anything. Old galvanised steel fails differently than copper does. Galvanised tends to rot from the inside and split along a seam, while copper freezes and bursts clean, and the repair for each one isn't the same. A section of pipe gets cut back to sound metal on both sides, and if it's galvanised the plumber usually has to decide whether patching a rotten run is even sensible. Third-floor bathrooms in Pittsburgh and Scranton, added long after the house went up, are a repeat offender because the line often crosses an uninsulated knee wall. After the joint is made the system gets refilled slowly and watched under pressure.
Frequently asked questions
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