Plumbing in Billings should use the short warm season for the work that cannot happen later: sill cocks, irrigation shutoff, a water heater with awkward venting, and any line in an exterior wall you can open while the house can spare the heat. A leak tonight does not wait for June. If water is loose now, say so and shut the main. Know which phone call you are making.
Sort the water. Irrigation and valley rain put water in window wells and basements that a supply leak will imitate. If the meter is still and the fixtures are off, look outside. If the meter is moving, find the supply. Clay and a grade toward the house will repeat the flood until the yard is fixed, and the yard has the same short season as the pipe. A cable clears a clog and does not heal a broken sewer. Ask about a camera if it returns.
Water heaters fail on their own calendar and are easier to replace when the vent and the roof jack can be reached in decent weather. Name gas or electric, the pan, and the shutoff. Hose bibs on the windward side, especially toward the rims, freeze first. Shut them from inside before the warm season is a memory. Do not send a sump into a line it was never meant to feed. Know the discharge. A pump that only runs in a hard rain is a different clue from one that runs on a dry day.
Finished basements on the West End hide a leak until it travels. Older south-side houses show it on a ceiling you can actually inspect. Say which house. A driving rain after hail can overwhelm a dented gutter and look like a pipe. Say if the wet spot followed weather. That keeps a roof problem from being opened as plumbing. Hard water and a tired valve belong in a remodel conversation, but a split line is today's call.
Say leak, drain, water heater, or winterizing, and the part of town. Say if you can shut the water off. If this is seasonal work, say that you still have warm weather and you do not intend to waste it. Call the number on this page.