Yes — running new water supply lines to a sink, dishwasher, refrigerator ice maker, or any other new fixture is a standard part of what Done’s plumbers do. Whether you’re adding an island sink in a kitchen remodel, installing a dishwasher where there wasn’t one before, or roughing in a wet bar in a finished basement, Done can extend your existing supply system to reach the new location cleanly and to code.

What Running a New Water Line Actually Involves

A new supply line requires tapping into an existing cold (and sometimes hot) water line, routing the new pipe through wall cavities, floors, or a crawlspace to the destination, installing an accessible shut-off valve at the new fixture, and connecting the final supply lines to the fixture or appliance. The plumber also pressure-tests the new connections before the job is closed up.

The complexity varies significantly based on where the new fixture is relative to existing supply lines. A dishwasher next to a kitchen sink is often a short connection from the existing hot-water line under the sink — typically a half-day job. An island sink in the middle of a kitchen requires routing through the floor structure and back up through the island cabinet, which involves more planning and labor. A sink in a finished basement means routing through finished ceilings or walls, which requires patching after the pipe is in.

Pipe Material Choices for New Lines

Done primarily uses PEX (cross-linked polyethylene) for new supply runs in residential work. PEX is flexible, which means fewer fittings and joints through difficult routing paths, and it’s significantly more resistant to freeze damage than copper — an important advantage in Colorado homes where temperatures can swing dramatically and crawlspaces or garage walls occasionally see near-freezing conditions.

Where the new line connects to existing copper, we use appropriate transition fittings. If your home has galvanized steel supply lines — common in Denver homes built before the mid-1970s — adding a new branch is a good opportunity to discuss whether spot replacement or a broader repipe makes sense, since old galvanized pipe corrodes from the inside and restricts flow over time.

Dishwasher-Specific Considerations

Dishwashers require a hot-water supply line, a drain connection to the sink drain or garbage disposal, and in most cases a high-loop or air gap in the drain line to prevent backflow — many Colorado municipalities require the air gap device by code. If your kitchen doesn’t have a dedicated shut-off valve for the dishwasher supply, Done adds one as part of the installation so future service or replacement doesn’t require shutting off water to the whole kitchen.

Dishwashers also have a fairly specific water pressure range they operate within. If your home has low pressure (common in some older Denver neighborhoods with aging water mains), or unusually high pressure (which can stress supply connections and shorten appliance life), Done can test your pressure and recommend solutions including a pressure regulator or booster pump.

Permits and Inspections

New water line work in most Front Range cities requires a plumbing permit, particularly when running new pipe through walls or floors. Done handles permitting and inspection scheduling. This matters at resale — unpermitted plumbing discovered during a buyer’s inspection is one of the most common negotiation friction points in Colorado real estate transactions.

Coordinating with Your Remodel or Appliance Installation

Rough-in plumbing for a new sink or dishwasher is best done while walls or floors are open during a remodel, before cabinets and finish surfaces go in. Done works alongside general contractors and kitchen designers, and we can sequence the rough-in and trim-out visits around the construction schedule. If you’re working with a cabinet installer or appliance delivery team, let us know the timeline and we’ll coordinate to make sure the water is where it needs to be when the fixture arrives.

To schedule new water line work for a kitchen, bath, or any other fixture, visit our kitchen and bath plumbing page or our pipes and lines service page. For larger remodel projects, financing options are available to help spread the cost of plumbing work alongside your other renovation expenses.