Lake Jackson Return Line Leak: Two Spots on One Pipe

Some leaks hide under the deck, out of sight. This Lake Jackson return line leak is a good example. The concrete pool kept losing water, yet nothing looked wrong from above. Pressure testing and careful listening found two leak spots on the same return line, plus a third area to check during the repair.

Here is how we narrowed it down without breaking any concrete first.

What a return line does

The return line carries filtered water from the equipment back to the pool. It ends at the jets on the pool wall. Because the pump pushes water through it, the line runs under pressure whenever the system is on. So a crack or a loose joint can lose a lot of water quickly.

Also, these lines usually run under the deck or under soil. That makes them hard to see and easy to guess wrong about.

Pressure testing every line

First, our technician plugged each line and brought it up to 12 psi. First, the cleaner line held. Next, the skimmer line and the skimmer front hole held. After that, the main suction drain and the common line held too. Then came the spa return, the spa suction and both water feature lines, and all of them passed. The equipment passed as well.

The pool returns were different. They lost pressure pretty fast. So that one result told us where to focus.

Listening along the Lake Jackson return line leak

A gauge says a line is leaking. It does not say where. For that, our technician listens along the pipe route with sensitive equipment. Escaping water makes a sound, and that sound gets louder once you get close to the leak.

On this pool, one leak showed up near the left side middle jet. Then another showed up close to the equipment. There was also a lot of noise near the corner jets. That could be a third leak, so the repair crew will check it when the line is open.

Ruling out the rest of the pool

Next, we checked the shell. The lights passed. A dye and visual check of the pool surface found no issue, and the skimmer throat was clean too. Hydrostatic tests on the main drain, the spa suction and the water feature suction all passed. The sheer descent passed as well.

As a result, the owner knows the problem is in the return plumbing, not the structure. That matters, because the two repairs are very different.

The repair plan

The report recommends two repairs. One is an under-deck repair, where a small section of deck opens at the marked spot. The other is an under-soil repair, where the crew digs only where the leak sits. We price repairs separately after the leak detection, once the spots are known.

Signs of a return line leak

A return line leak often makes the pool lose more water while the pump runs. You may also see wet spots or soft soil along the pipe route. Air bubbles coming out of the jets can be another clue. Still, those signs only hint at the problem. A pressure test confirms it.

We serve Brazoria County and the wider Houston area. See our pool leak detection near Lake Jackson page, read about return line and pipe leak repair, or learn how pool pressure testing works. Brazoria County owners have reviewed our work on Google.

Can one return line have more than one leak?

Yes. Older lines can crack in several places, and joints can fail on their own. This pool had two confirmed spots and a third area worth checking.

Will the whole deck need to come up?

No. Once the leaks are located, the crew opens only the marked sections. That keeps the work small and the cleanup simple.

Is your pool losing water faster with the pump on? Reserve a time and we will test every line.