#1 · EDMONDS
Water line replacement runs a new supply line from meter to house — the permanent fix for failing galvanized, polybutylene, or repeatedly-leaking lines. Modern trenchless pull-through methods usually spare the yard.
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Trenchless replacement needs two pits (at the meter and at the house) and typically finishes in a day. Open trenching is reserved for lines with too many bends or obstructions.
On the wet side you'll mostly see PEX or HDPE (flexible, freeze-tolerant, trenchless-friendly) and copper where soil conditions favor it. Any of the three, properly installed and permitted, outlives your mortgage.
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