Underground Water Line Leaks at Apartment Communities

It usually starts with the bill: a property manager notices the monthly water bill is well above the pattern for the same season, and no resident has reported a leak. Nothing is wet on the surface. A buried line can lose water for months without showing itself, especially in Arizona soil that drains quickly, so the first sign is often the bill.

Apartment communities have a lot of pipe underground. There's the supply from the city meter, the branches to each building, irrigation and pool lines, and fire lines, which are a separate system. A leak on any one of them looks the same on the bill.

We start with the meter, because it settles the first question. With every unit and the irrigation off, if the meter dial or leak indicator is still moving, water is leaking on the property side. Submeters on individual buildings, where they exist, narrow it down faster.

Then we isolate. Closing valves one section at a time shows which branch is losing water, since the meter stops moving when the leaking branch is off. From there, acoustic and electronic locating equipment pinpoints the spot along the pipe, so the dig is a hole and not a trench. Before anyone digs, the utilities get marked through Arizona 811, and we pull any permit the location needs.

Once the leak is pinpointed, we excavate only that spot, repair or replace the damaged section, pressure-test it, and backfill. If the pipe is old and has failed in several places, we say so and lay out the options, which may include replacing a longer run. A pinhole in a corroded line is often a sign of more to come.

The aim is minimal downtime. Isolating a branch often keeps the rest of the community on water, and we schedule shutoffs with the property manager so residents get notice.

Have the last year of water bills ready, plus any site plan or as-built drawings that show where lines run. If you have submeters, read them before we arrive. Tell us about any recent landscaping or paving work, since those are common triggers. And keep in mind that a leak on the city side of the meter belongs to the utility, so confirming where the leak sits can save you a repair bill.