Pool vs. Evaporation in Round Rock: How to Tell If You Actually Have a Leak

The bucket test: how to do it right

For Teravista pool owners the test is the same: fill a bucket to within one inch of the top and place it on a step in the pool with the rim above water. The water inside the vessel and the fluid in the pool are now subject to the same temperature, the same wind, and the same sunlight. Evaporation affects both equally. Mark both water levels on the bucket and on the basin wall with tape or a waterproof marker. Allow exactly 24 hours without running the pool or adjusting the level. Then read both marks and compare the change.

If the pool level dropped more than the bucket level, the difference is from a leak. If both dropped the same quantity, the loss is from evaporation only. This test removes the variable of weather and gives you a direct comparison. Repeat it again once to confirm, because a windy day or a change in sun exposure can skew a single reading. Call (512) 737-6168 if the bucket procedure consistently shows the pool losing more water than the bucket and you want the seep investigated.

Dye testing and pressure testing

Once the bucket trial confirms a real leak, the next step is locating it. A dye test at the skimmer, the returns, the light niches, and any visible fitting shows where dye gets pulled through a gap into the escaping water. Dye migrates toward a real leak in the still water around a fitting and gets drawn through the gap if the seal is compromised. Fittings where the dye holds steady are not the source.

Buried plumbing leaks are found with a pressure test. Each line is plugged at the pool and at the mechanical pad, then pressurized and monitored for a pressure drop that confirms a break in that specific line. Listening equipment then locates the break along the pipe path before any deck is opened. A shell that passes the dye test and a plumbing system that holds pressure on every line points at evaporation or at a very slow structural weep that requires a more detailed inspection. Call (512) 737-6168 if the bucket test shows a real leak and you want it properly located before anything is opened.

Getting the leak found and the pool back to holding its water

Once the bucket test confirms a pool is losing more water than evaporation accounts for, professional inground pool leak detection and pool leak detection advances the investigation to locating the source. The process is methodical rather than exploratory, because opening deck and shell sections before the leak location is confirmed creates additional restoration costs alongside the repair cost.

We start at the most accessible locations and work outward. The equipment pad is checked first for pump seal drips, filter manifold weeps, and heater connection leaks, all of which are visible with the equipment running and require no excavation. The skimmer faceplate and the return fittings are dye-tested in still water, watching for the color to get drawn toward any gap or crack at the fitting seal. The light niches and the main drain cover are checked the same way.

If the accessible fittings pass dye testing, the subterranean plumbing comes next. Each return line and suction line is pressure-tested by plugging at the pool and at the equipment pad and monitoring the pressure gauge for a drop that confirms a break underground. A line that holds pressure has no buried failure. A line that loses pressure has a break somewhere along its run, and acoustic listening equipment then locates the break before any deck is opened.

The remediation follows the locate. A shell fitting repair is done in the water or with the water lowered to the repair level. A buried line break is excavated at the confirmed location and the failed section is replaced and re-tested. The deck is opened only at the precise point where the repair is needed, not across a search area. A pool that maintained its level before the failure should hold it again after a confirmed, targeted repair.

With Stage 2 drought restrictions in effect and weekly top-off limits applying to pool filling, getting a pool leak found and fixed is both a water conservation matter and a compliance one. Call (512) 737-6168 to schedule a pool leak investigation and get the bucket test result confirmed with professional equipment.

Round Rock is in USDA Hardiness Zone 8b, and the climate produces substantial evapotranspiration rates from May through September. The combination of solar radiation, ambient temperature, and low relative humidity draws moisture from open surfaces at a rate that most homeowners underestimate. An uncovered residential pool of 20,000 gallons loses approximately 2,500 to 5,000 gallons per month to evapotranspiration during peak summer months under normal conditions. A covered pool loses far less. Comparing covered and uncovered loss rates in the same week is one way to quantify how much the cover is saving and whether the residual loss is within the expected range.