Plumbing in Delaware splits between old pipe in the northern towns, wells and septic fields farther south, and freeze on the inland side. A high water table means basements and crawl spaces take water that a hill house might never see. Beach houses need lines drained if they sit empty through a cold spell. Say city water or a well, and say what the water is doing right now.
A supply leak runs when the fixture is idle. A drain leak shows up when you use the fixture. Know the main shutoff, especially in an older house with stiff valves. If water is at a ceiling, a panel, or a finished floor, say that first. On the coastal plain a sump may be what keeps the house dry, and a failed pump is a plumbing call even if no faucet is involved.
Freeze still hits inland hose bibs, crawl spaces, and exterior-wall kitchens. Closer to the ocean the common stories are a tired water heater, corrosion on fixtures, and a drain that misbehaves after the house has been closed. Roots in a lateral under old trees show up in the northern neighborhoods and in older inland towns. Tell us whether the trouble started on a cold night, after a rain, or when you turned the water back on in spring.
Say gas or electric if you know the heater, and whether it leaked or went cold. Rust at the base and a dripping relief line are worth a mention. If you are on septic, a slow drain may be the field and not the trap. Do not treat those as the same clog. A raised house can hide piping under the floor that a slab house does not have.
You need the symptom, the level of the house, and whether you can shut the water off. Plumbing in Delaware is wet ground, salt air on some streets, and winters that still freeze away from the beach. Call the number on this page.