Low Pressure Everywhere? The Problem May Be Between the Meter and the House

The case for the service line

Here's the pattern that points at the main water line: pressure is low at every fixture, not just one. The water bill is up. There's no sign of a leak inside the house, no stains, no sounds, no damp spots. And the meter moves with everything off. When the whole house is affected equally and the house itself looks dry, the leak is usually in the one pipe everything shares: the service line from the meter to the house.

The main-valve isolation test confirms it. Close the valve where the line enters the house and watch the meter. If the meter keeps turning, water is escaping between the meter and that valve. There's nowhere else for it to go. That test takes five minutes and it changes the entire job from "search the house" to "trace the yard."

What breaks a service line

Service lines fail for unglamorous reasons. Age and corrosion on older galvanized or copper lines. Shifting clay soil working a joint loose over decades. A rock pressing against the pipe since installation day, finally wearing through. Freeze expansion in a shallow section. Or damage from later yard work: a fence post, a new tree, a trench for something else that nicked the line years ago and finally let go.

In Columbia's older neighborhoods, original service lines can be many decades old, and they're living on borrowed time. In newer areas, the lines are younger but not immune: poor bedding, sharp backfill, or a fitting that was stressed during installation can fail early. The symptom is the same regardless of age: water leaving the system underground. We locate service line leaks across Columbia and the surrounding communities.

Tracing the line, then the break

The work has two phases. First, the line's path: from the meter to the house, verifying the route rather than assuming it's straight. Landscaping, driveways, and old repairs can all shift where the line actually runs. Second, the break: listening along the path for the sound of escaping water, which is loudest at the surface directly above the failure. Pressure testing the isolated line confirms the diagnosis and hints at the leak's size.

Where conditions allow, tracer gas adds precision: introduced into the isolated line, it escapes at the break and rises through the soil to be detected at the surface. Two methods agreeing on a spot is our standard before the mark goes down, because the mark is where the excavator digs, and digging is the expensive part.

Repair, replace, or reroute

Once the break is marked, the repair conversation is your contractor's, but it helps to know the options. A single break in an otherwise sound line usually means a spot repair: dig at the mark, cut out the failed section, couple in new pipe. A line with multiple weak points, or one that's at the end of its material life, may be a better candidate for full replacement, often by trenchless methods or a new routed line. We'll give you our honest read on the line's apparent condition, but the call is yours and your contractor's.

One thing to settle early: responsibility. You typically own the service line from the meter to the house; the utility owns the meter and the street main. Our isolation test shows which side the leak is on. If it's the utility's side, that's their repair, and you shouldn't be paying for it.

Don't wait on a service line leak

A leaking service line doesn't fix itself and it doesn't stay the same size. Water eroding the soil around the pipe washes out the bedding, the pipe flexes more, and the break grows. What starts as a high bill becomes a sinkhole in the yard, undermining for the driveway or walkway above, and in a worst case, water finding its way to the foundation. The earlier the mark goes down, the smaller the dig and the smaller the bill.