Inground Pools · Loveland, CO · Larimer County
Inground Pool Leak Detection & Repair in Loveland, CO
Under your deck is a plumbing system nobody has laid eyes on since the concrete was poured: skimmer lines, return lines, a main drain run, maybe a cleaner line, all buried and all invisible. Inground leak work is archaeology with a pressure gauge, and it convicts one buried line at a time.
The Buried Suspects, Line by Line
An inground pool runs distinct circuits, and each fails its own way. Skimmer lines crack at the skimmer throat, where deck and shell move against each other every season. Return lines let go at elbows under the deck. Main drain runs, the deepest and oldest suspects, fail rarely but expensively. Cleaner and water-feature lines add circuits owners forget exist until one of them is the answer.
The skimmer throat deserves special mention because it is the single most common inground failure. The skimmer body is cast into the deck while the shell is its own structure, and the joint between them takes every freeze-thaw and soil-movement cycle. A crack there leaks only near the top of the water column, which is why so many pools "stabilize" an inch or two below the skimmer mouth.
Pressure Isolation: Convicting One Line at a Time
Each circuit gets plugged at the pool end, connected to a test rig at the pad, and pressurized on its own. A line that holds pressure is innocent and gets crossed off. A line that bleeds is the suspect, and induction listening or gas tracing along its route marks where. The method is exhaustive by design: it does not guess among the circuits, it eliminates them.
The payoff is surgical access. A conviction at a marked point under the deck means one core cut or a small saw-cut opening at that spot, not a trench through the patio. Where geometry allows, lining or pull-through repair of the failed run avoids opening the deck at all. Deck restoration gets scoped and priced with the repair rather than discovered after it.
Shell Fittings and the Freeze-Thaw Tax
The shell’s own penetrations, returns, lights, and the main drain sump, seal plaster or liner to plumbing, and every one is a candidate that dye testing convicts underwater without draining. Light niches earn their reputation. The conduit that carries the cord is a straw out of the pool unless its seal is intact, and a pool losing to the niche can drain to light-level and hold there for weeks.
Front Range freeze-thaw taxes every one of these joints harder than milder climates do. Gunite pools of the older generation around the lake-adjacent streets carry decades of those cycles in their skimmer throats and fitting seals, and the pattern of what fails first here is climate-written.
Repairs That Match the Conviction
Skimmer-throat cracks get properly prepared and rebuilt with bonding repair materials, or the skimmer replaced outright when the body itself split. Fitting and niche seals get re-sealed underwater or dry, by scope. Buried line repairs run from marked-point section replacement to rerouting a chronically failing run overhead of the problem soil. Every repair ends with a retest of the repaired circuit under pressure, because the gauge that convicted the line is also the witness that clears the repair.
Older systems often lose to more than one failure at once. When that happens, the findings arrive itemized and ranked by loss, so the budget attacks the biggest leak first, using the numbers the bucket-test math established.
Built for Deck-and-Dig Decisions
Nobody should cut concrete on a hunch. The whole inground discipline exists to put a pressure-gauge conviction and a surface mark in front of you before any saw starts, with the repair, the access, and the restoration priced as one honest scope.
If your pool holds at a suspicious elevation, or the deck stays damp in one spot the sun never fixes, (303) 552-3896 books the line-by-line test. Bring the pool’s age and equipment layout if you know them; the circuits usually match the era.
✆ Call (303) 552-3896Inground Pool Questions
Do you have to drain the pool to test it?
No. Pressure isolation runs with the pool full, dye testing happens underwater, and draining is actually avoided: an empty shell in expansive clay can shift or float on groundwater, creating a bigger problem than the leak. Full-pool testing is both the safer and the more accurate path.
The pool drops to the bottom of the skimmer and stops every time.
That elevation is a confession. Holding exactly at the skimmer's lower mouth points at the skimmer throat or the skimmer line, the most common inground failure there is. The pressure test on that circuit plus dye at the throat typically convicts it in one visit.
Air bubbles blow out of the returns when the pump starts. Related to my leak?
Usually yes. Air in the returns means the suction side is pulling air through a breach or a bad pump-lid seal, and a suction line that inhales air when running often exhales water when off. The suction circuit moves to the top of the test order when bubbles are part of the story.
Our pool is thirty years old. Is finding parts and matching repairs even possible?
Almost always. Skimmer bodies, fittings, and niche hardware have modern equivalents and adapters, and buried line repairs use current pipe regardless of era. The honest caveat on older gunite is that one conviction sometimes reveals neighbors; the itemized findings let you decide how far to go.