Main Water Line Installation
New main water line, done right from street to meter.
Whether you are connecting a new build, replacing a failed original line, or upgrading undersized service, Wes installs main water lines that meet code and last.
When you need a new main line
New builds, replacements, and upgrades.
Main water line installation comes up in three situations: a new home or ADU that needs its first connection to the city water main, an existing home whose original line has failed beyond repair, or a home that needs a larger service line to support added fixtures, irrigation, or higher demand.
Each situation has different permitting, trench depth, and connection requirements depending on municipality. Wes has worked across Littleton, Jefferson, Arapahoe, and Douglas County municipalities and knows what each requires. Get a straight quote before you break ground.
Most replacements are no surprise by the time we get the call. The line has been telling on itself: pressure that drops off when the sprinklers kick on, a meter that creeps when every fixture in the house is closed, a wet stripe in the yard that stays green through August while everything around it browns out. On the older side of Littleton and Lakewood the original service is often galvanized steel or soft copper, and after sixty-plus years in Colorado clay the outside is pitted and the inside is scaled. Once a line starts pinholing in more than one place, patching it is throwing money at pipe that is already spent.
The other common trigger is a house that outgrew its service. A three-quarter inch line running a 1960s ranch with one bathroom does not stretch to cover a finished basement bath, a second full bath upstairs, a filtration system and a sprinkler zone. Everybody blames the fixtures, replaces showerheads, and nothing improves, because the restriction is out in the yard. Wes will check static and flowing pressure at the house before recommending anything, so you find out whether the problem is the service line or something correctable inside. Sometimes it is just a failing pressure-reducing valve, and that is a much shorter conversation than a new line.
- New construction service connections
- Failed line full replacement
- Undersized line upgrade
- ADU and addition connections
- Irrigation system supply lines
- Code-required material upgrades
The installation process
Permitted, inspected, and built to last.
A main water line installation starts with the permit. Wes pulls the permit, stakes the trench, and coordinates the tap at the city main. The trench depth depends on local frost line requirements, which on the Front Range typically means 4 to 5 feet. We bed the pipe in sand, make the connections at both ends, pressure-test before backfill, and schedule the inspection.
The material we install is copper or PEX, sized for the home and approved by the authority having jurisdiction. No shortcuts on a line meant to last 50 years.
Depth is where cheap work shows up years later. The frost line on the Front Range means the pipe sits four to five feet down, deeper in the mountain towns, so it stays below the ground that freezes and thaws every winter. A line laid shallow to save a day of digging will eventually freeze in a cold snap, and when it does it is under your driveway and you cannot get to it. The bedding matters just as much. Our soil carries cobble and sharp rock, and a pipe backfilled with the same rock you pulled out of the trench gets a stone pressed into it under load. Sand goes in under and over the pipe so nothing is bearing on a point.
Before anything gets dug, the locates go in. Gas, electric, cable and irrigation all cross the same yard the water line has to travel, and the route gets planned around them rather than through them. Where a driveway, a mature tree or a finished patio sits in the path, boring under it beats trenching through it. Wes walks the route with you first so you know exactly what the yard looks like on day one and what it will look like when the sod goes back. Nobody enjoys finding out after the fact that the trench took out a sprinkler main nobody mapped.
- Permit and inspection coordination
- City main tap and connection
- Proper trench depth for frost line
- Sand-bedded pipe installation
- Pressure test before backfill
- Surface restoration after install
Sizing it right
The right size the first time.
An undersized main line causes pressure problems that no amount of work inside the house can fix. Before installing, Wes calculates the demand for the home, accounts for any planned additions, and sizes the line so you have headroom for the future. A three-quarter inch line that was fine for a 1960s ranch is often not enough for a remodeled home with three full baths, a whole-house filter, and a dedicated irrigation zone.
Getting the size right at installation costs nothing extra and avoids a future replacement. See examples of our work.
Sizing is arithmetic, not opinion. You count the fixture units in the house, add what the irrigation zones draw, factor the static pressure the city delivers at your address and the elevation change from the main to the house, then pick the diameter that carries it without dropping pressure at the far fixture. Neighborhoods up in the foothills sit at a different head pressure than the ones down along the valley, so the answer genuinely changes street to street. Wes runs those numbers before quoting, and he asks what you are planning to add in the next ten years, because upsizing while the trench is already open costs almost nothing and doing it later costs the whole job again.
While the line is open is also the moment to fix everything sitting at that end of the system. The main shutoff in the house is frequently an old gate valve that no longer closes fully, and it gets replaced with a proper ball valve you can actually count on. The pressure-reducing valve gets checked or swapped. If the house is being repiped inside anyway, the two jobs line up well and only one wall gets opened. Get it right once and the next person who thinks about that line is the one who buys the house from you.
Full service from permit to backfill
Main line installation, start to finish.
As a master plumber and licensed plumbing contractor, Wes handles the permit, the excavation, the pipe, the connection, the inspection, and the surface restoration. You do not coordinate multiple contractors for a job that one licensed pro can own completely.
That matters on this job more than most, because a main line replacement touches a plumber, an excavator, the water department and whoever puts your yard back. Split those across four outfits and the schedule belongs to nobody. Wes holds both a Master Plumber license and a General Contractor license, so the trench, the pipe, the tap coordination, the inspection and the surface restoration all sit with one person. If your service line has already failed rather than just weakened, main water line repair covers the emergency side of it, and if the pipe inside the house is the same vintage, repiping is worth pricing at the same time.
We serve Littleton and the surrounding Front Range. Call (303) 883-9075 and let us size and price the installation before you start planning around it.
How a call goes
Straight answer, fair price.
Same standard whether it is a quick job or a full replacement.
Plan and permit.
We assess the route, size the line, and pull the required permits.
Coordinate the tap.
We work with the water department to schedule and make the city main connection.
Excavate and install.
Trench to frost depth, bed in sand, install copper or PEX, make both connections.
Test and inspect.
Pressure test, schedule municipal inspection, get it signed off.
Restore the surface.
Backfill, compact, and restore the grade or hardscape.
Straight answers
Questions about main water line installation.
Do I need a permit for a new main water line?
Yes, in effectively every Front Range municipality, and there is usually a tap or connection fee from the water department on top of the permit itself. Wes pulls the permit, coordinates with the water department for the tap, and meets the inspector before the trench gets backfilled. Doing this without a permit is how a homeowner ends up digging the line back up.
How long does the job take?
One to two days of actual work on a typical residential run, assuming the route is clear and the water department can schedule the tap. What stretches it is length, rock, boring under a driveway, and whose calendar controls the tap. You get a real timeline before anybody digs, and you know roughly how long the water is off.
How long will my water be shut off?
Only for the tie-ins, not for the whole job. The trench gets dug and the new pipe gets laid and tested with your existing service still running. The shutoff window is the hours it takes to make the connection at the meter end and at the house, usually part of one afternoon. If somebody in the house needs water at a specific time, say so and we work around it.
What size line do I need?
It depends on your fixture count, irrigation demand, the pressure the city delivers at your address, and the run length. Wes calculates it rather than defaulting to whatever was there before, because the old line was sized for the house as it existed decades ago. He will also ask what you plan to add later so the line has headroom instead of being maxed out on day one.
Can you connect a new ADU or garage apartment?
Yes. That is a full run from the city main or from an existing service, depending on what the jurisdiction allows and whether the ADU needs its own meter. Rules differ between Littleton, unincorporated Jefferson County and the Denver side, and that answer needs to be settled before you finalize a site plan. Ask early and it saves redrawing.
Copper or PEX, and does it matter?
Both are code-approved and both outlast what they are replacing. Copper is the traditional choice and handles the connections cleanly. PEX runs in one continuous piece with no joints in the ground, which is a real advantage on a long run, and it tolerates ground movement better in our soil. Wes picks based on the run, the soil and what your jurisdiction requires, and he will tell you which he chose and why.
Will my yard be destroyed?
There will be a trench, and we are not going to pretend otherwise. Where a driveway, patio or mature tree sits in the path, boring under it avoids cutting through. Everything else gets backfilled, compacted properly so you do not get a settling trench across your lawn next spring, and the grade restored. Sod and landscaping get discussed in the walkthrough so nothing about the finished yard is a surprise.
Is this covered by homeowners insurance?
Usually not. Most policies treat the service line from the meter to the house as the homeowner’s responsibility and exclude gradual failure, though some carriers sell a service line rider and some water utilities offer a protection program. Worth a phone call to your agent before the work. What Wes can give you is documentation of the condition and the work performed if you do end up filing.
Need a new main water line installed?
Wes handles the permit, the trench, and the connection. One call, one license, done right.