Service
Above-Ground Pool Leak Detection
If an above-ground pool is losing water, it is escaping from somewhere specific, and there are only so many places it can go: a puncture or tear in the liner, an open seam, a liner that has pulled out of its bead track, the skimmer or return connections cut through the wall, a fitting gasket that has hardened with age, the hoses and valves between the pool and the pump, or the equipment itself. Our job is to find which one it is, and then tell you what repairing it involves. We work on above-ground pools in Wilmington and throughout coastal North Carolina.
How the leak is located rather than assumed
We start by looking, methodically and in order, instead of assuming the liner is finished. Most of an above-ground pool can be examined directly: the liner from inside the pool, the wall and the bead track from the top, the skimmer and return connections from both sides, and the hoses, valves and equipment with the pump running. A tear is usually small and rarely where the owner expects it.
Dye testing confirms a suspected point. With the pump off and the water still, dye released beside a tear, a seam or a fitting is drawn into an opening that is leaking and drifts away from one that is not. It confirms a specific spot rather than searching a whole pool, which is why the inspection comes first and the dye second.
The plumbing is tested separately from the pool. An above-ground pool has the same circuit as any other: water out to the pump and filter, and water back. A leak anywhere in that circuit looks exactly like a liner leak from outside. We isolate the lines and test them on their own, and pressure test them where the plumbing allows it, so the liner is never blamed for something behind it.
The pool stays full for all of it. Dye only travels toward a leak when there is water above it to carry it there, and an empty liner can shrink and may not fit properly again. Draining an above-ground pool hides the leak rather than exposing it.
Finding the leak and repairing it are two separate jobs, and the second depends on the first. Once we know where the pool is losing water we can repair it, and the quote for that repair is free once we know what is broken. If we find more breaks while we are working, we tell you what those would cost before fixing them and you decide.
Many tears can be patched, depending on the age, condition and location of the vinyl. An old, brittle liner may not hold a patch, and when that is what we find we say so rather than take payment for a repair we do not expect to last. We do not replace full liners.
Liner patches are the one repair we do not warranty, because a liner can be torn again by something outside our control. Every other repair we make carries a one-year warranty: if our repair leaks again, we come back and put it right. Plumbing repairs are pressure tested once they are complete.
Where an above-ground pool loses water
Which one it is decides what the repair involves.
- Liner punctures and tears
- Usually small, often in the floor, and frequently caused by something dropped into the pool or dragged across it. Size is a poor guide to how much water is being lost.
- Seams
- The panels of a liner are welded together, and a weld that has begun to open leaks along its length rather than at one point. This is most common on older liners.
- Bead track and liner seating
- The track around the top of the wall holds the liner in place. If the liner pulls out of it, or was never seated properly, the water drops to the level of the separation and then stops.
- Skimmer connections
- The skimmer is bolted through the wall and the liner against a gasket and faceplate. That joint is a common leak, and it is one of the few that can often be dealt with without working on the liner itself.
- Return fittings and gaskets
- The return is another hole cut in the liner at installation. The fitting can loosen and the gasket behind it hardens with age, so it is checked in the same pass as the skimmer.
- Accessible plumbing
- On most above-ground pools the hoses, unions and valves between the pool and the pump sit above ground, which makes them straightforward to test and often straightforward to repair.
- The equipment side
- A pump lid seal, a drain plug, a filter head or a valve will drop the water level exactly as a pool leak does, while the pool is not the problem at all.
Tell us about your pool
Describe what you are seeing, and we will tell you what it may mean and what a visit would involve. If the water level is dropping fast, call us. You will reach a family-owned, owner-led team.
Do you have to drain the pool or take the liner out?
No. The pool stays full. Dye needs water above the leak to be drawn into it, so an empty pool hides exactly what we are looking for, and an empty liner can shrink and may not fit properly again.
Can a tear be patched, or do I need a new liner?
Many tears can be patched. It depends on the age, condition and location of the vinyl, and we will tell you once we have found the tear and seen it. An old, brittle liner may not hold a patch. We repair liner leaks, including patching tears, but we do not replace full liners.
The liner looks fine. What else could be losing the water?
The skimmer and return connections and the gaskets behind them, the hoses and valves between the pool and the pump, and the pump and filter themselves. Every one of those looks like a liner leak on the water level, and every one is checked.
How soon can you come out, and do I need to be home?
Leak detection visits are typically scheduled within the same week, depending on our schedule. You do not need to be home; just tell us how to reach the pool when you book.
What if you do not find the leak?
If the pool is clearly losing a lot of water and we do not find the leak on the first visit, we come back free of charge. That does not apply when the pool’s condition prevents testing, such as a dirty pool or a water level that is too low. Sometimes a pool turns out not to be leaking, and that is a useful result too: we tell you what we tested and what we ruled out.
Is the repair quoted before any work starts?
Yes. Repair quotes are free once we know what is broken, and you have the price before the repair begins.
Is an above-ground pool the same as a vinyl liner pool?
Not quite. Above-ground describes how the pool is built; vinyl liner describes what lines the inside of it. Nearly every above-ground pool is vinyl-lined, which is why this page spends most of its time on the liner, its seams and its fittings, and plenty of inground pools have liners as well. If your pool is an inground vinyl liner pool, our inground vinyl liner leak detection page covers that work, because buried plumbing changes the order of the job.