Plumbing in Maryland splits between old pipe in the settled towns, freeze in the west, and high groundwater near the bay. Galvanized supply lines and cast-iron drains still serve plenty of older houses. Rural places may run on a well and a septic field, which changes what a slow drain means and what a remodel may disturb. City water and a private well do not fail the same way. Say which one you have, and say what the water is doing right now.
A leak is either on the supply or on the drain, and the call is faster if you know which. Supply water runs even when the fixture is idle. Drain water shows up when something is used. Find the main shutoff before a bad night, especially in a house where the valves have sat still for years. If water is reaching a ceiling, a finished basement, or an electric panel, say that first.
Freeze is sharpest in the western counties, but an exposed wall can still surprise a house farther east. A crawl space open to the wind, a hose bib with no inside shutoff, and a kitchen line on an exterior wall are the usual weak points. Closer to the bay, the common stories are a tired water heater, roots in a sewer under old trees, and a sump that runs whenever the ground is soaked. Tell us which of those you are looking at.
Water heaters sit in basements, closets, and sometimes above the living space. Say gas or electric if you know, tank or tankless, and whether the unit leaked or simply went cold. Rust at the base, a dripping relief line, and a rumble when water is flowing are worth mentioning. If a sump or a floor drain in the basement is part of how the house stays dry, include it.
You do not need the age of every pipe. You need the symptom, the floor it is on, and whether you can shut the water off. Plumbing in Maryland is old metal in some houses, wet ground in others, and winters that still freeze on the ridges. Describe what is wet and when it started. Call the number on this page.