New Interior Water Line Installation

New water lines inside a building are the supply side of any addition, remodel, ADU, shop or new home: the trunk from the point of entry or the existing system, the branches to where the fixtures will go, the hot and cold runs from the water heater, and the stubs left ready for the fixture installer. It's rough-in work, done before the walls close, and it has to be routed, sized, supported and tested correctly so that it never becomes a leak detection call.

We run new supply in PEX-A or copper to suit the job, from a manifold or trunk, with shutoffs at the branches, a pressure regulator where the system needs one, and the stubs capped and pressure tested before inspection. On an ADU or a shop we often run the new exterior service line and the interior rough-in as one project: the trench from the meter or the existing line, the point of entry, the interior distribution. On a remodel we tie into the existing system where it's sound and replace the part that isn't.

We're a registered general contractor with licensed plumbers on the team, bonded and insured, so the permit, the exterior excavation with our own equipment, the interior rough-in and the inspection are one contractor's responsibility. We coordinate with your builder, your electrician and your fixture installer, and we document the routing so the lines can be found later.

When you need interior water line installation

• An addition or remodel that adds or moves fixtures
• An ADU, guest cottage or shop that needs its own supply
• A new home or a shell building ready for rough-in
• A basement or garage conversion
• A new water heater location

How the job goes

1. Plan. Fixture locations, routing, pipe sizing and the point of connection, drawn and agreed with the owner or builder.
2. Permit. Pulled by us as the general contractor, with the inspection scheduled.
3. Exterior tie-in. A new service line trenched and connected where the project needs one, with our own equipment.
4. Rough-in. Supply run from the manifold or trunk to every fixture location, supported, insulated where required, with shutoffs and stubs.
5. Test and inspect. The system pressure tested and inspected before walls close.
6. Document. Routing recorded so the next contractor doesn't have to guess.

Equipment and materials

• PEX-A or Type L copper
• Manifold and branch fittings
• Fixture shutoffs and stub-outs
• Pressure regulator and expansion tank as required
• Pipe insulation and supports

What shapes the scope

Every property is different, and these are the things that decide whether a job is a quick morning or a full day. We'll tell you which it is before we start.

• Number of fixtures and distance from the point of connection
• Whether a new exterior service line is part of the project
• New construction versus tying into an existing system
• Permit and inspection requirements
• Coordination with other trades