Spa Leak Detection and Repair in Round Rock, TX
A built-in spa packs a lot of plumbing into a small shell. Jets, a blower line, and the runs to the equipment all crowd together, so a spa can lose water fast while the pool beside it looks perfectly fine.
Where a built-in spa leaks
An attached spa has its own set of leak points. Each jet is a fitting through the shell, sealed with a gasket that can weep. The suction and pressure lines feeding the jets run under and around the shell, and the heater and pump unions at the equipment pad add more joints. A spillover spa that pours into the pool shares some plumbing with it, and a valve that does not fully close can quietly move water between the two.
In Stone Canyon and other backyards where a spa was built alongside the pool, that shared plumbing is the first thing we sort out.
Spa losing water but the pool is fine
The most telling symptom is a spa that drops while the pool holds steady. That points at the spa's own shell, jets, or dedicated plumbing rather than anything shared. We isolate the spa from the pool at the valves and watch each on its own, which separates a true spa leak from water simply flowing over the spillover. Running the spa and watching the loss under jet pressure shows whether a pressurized line is the culprit.
If your spa empties faster than the pool, call (512) 737-6168 and we can isolate it.
Tracking the jet and line leaks
Once the spa is isolated, we narrow it down. A dye test at each jet fitting in still water shows a weeping gasket, and a pressure test on the jet plumbing confirms a break in a buried line. At the equipment pad we check the heater and pump unions, which loosen with heat cycling and are a frequent, easy-to-miss source. We pinpoint the leak before opening anything, so the repair lands in one spot, not across the whole spa surround.
Repairs at the shell and pad
The fix follows the source. A weeping jet gets a new gasket and a properly seated fitting. A leaking union at the heater or pump is rebuilt and snugged correctly so it survives the next heat cycle. A confirmed break in a spa line is exposed at the located point and replaced, then re-tested. A spillover valve that passes water is repaired so the spa and pool stop trading water unintentionally. We confirm the spa holds before calling it done.
The valves between the spa and pool get particular attention, because a spillover system relies on them to keep the two bodies of water separate when they should be. A diverter valve that no longer seats lets the spa drain into the pool on its own, which reads as a spa leak when nothing is actually broken. We test and rebuild those valves so the spa holds its own level again, and stops quietly feeding the pool.
Why a spa leak runs up the bill quietly
A spa holds far less water than a pool, so a leak there shows as frequent refilling and a heater that runs longer trying to keep a dropping volume warm. That combination wastes both water and energy, and the hard water here scales the heater faster as fresh make-up water keeps arriving. With 2026 drought limits in place, the constant top-offs stand out. Finding the leak early keeps it a gasket or a union, not a torn-out surround. Call (512) 737-6168 and we can run it down.
Not sure what you are dealing with? Talk it through.
📞 (512) 737-6168Frequently Asked Questions
My spa loses water but the pool does not. Why?
That points at the spa's own shell, jets, or dedicated plumbing rather than anything shared with the pool. We isolate the spa at the valves and test it on its own to confirm.
Where do built-in spas usually leak?
At the jet fittings, the buried jet plumbing, and the heater or pump unions at the equipment pad. A spillover valve that does not fully close can also move water to the pool.
Can you fix a spa leak without redoing the whole spa?
Usually, yes. We pinpoint the jet, line, or union first, so the repair lands in one spot. Only widespread plumbing failure calls for anything larger, and we would explain that clearly.
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