Plumbing in Wilmington is old pipe in brick houses, plus water that shows up where the hills meet the plain. Galvanized lines and cast-iron stacks still serve plenty of kitchens. A house on the rocky side may have a basement floor that is nearly stone, with a drain that was an afterthought. A house down toward the Christina may take water through the foundation when the river side of town is high. Say what is wet and on which floor.
Find the main shutoff before you need it. Valves in these cellars seize. Hose bibs on the weather side of a hill house freeze if the inside valve stays open. If water comes up from a floor drain during a hard rain, that is not the same event as a supply line bursting over a stair. Say which one you have. Pressure can be strong on the low streets and fiddly on the upper floors of a tall brick house.
Water heaters sit in basements and closets. Say gas or electric, leaked or simply cold. A relief line dripping onto a cellar floor is easy to ignore until it is not. Slow drains in older stacks, and roots under mature hillside trees, show up when several fixtures gurgle together. A single slow lavatory is more often a branch. Tell the difference if you can.
Additions on the back of older houses sometimes added a bath with a long, flat run. If that bath is below the street sewer, a pump may be part of the story, especially on the low side of the fall line. You do not need every metal named. You need the symptom and whether more than one fixture is involved. Rock in the yard also means a dig outside is not a casual trench.
Describe what is wet and whether you can shut the water off. Plumbing in Wilmington is old stacks, hillside freeze, and basements that feel the rivers. Call the number on this page.