Above Ground Pool Is Not Level?
Ever walked out to admire your garden pool, only to realise it’s leaning like it’s had one too many at the summer BBQ? Short answer: no, it’s not okay.
An unlevel pool isn’t just an eyesore. It can cause uneven water, strained walls, and a list of repairs you don’t want to pay for.
The good news? You can usually fix it yourself. In this guide, we’ll show you how to spot the problem, what causes it, and exactly how to get your pool back on the straight and narrow — without the stress.
The Dangers of an Unlevel Pool
Why an Unlevel Pool is a Major Problem
A slightly tilted pool might seem harmless at first. But over time, that lean can do real damage.
The extra water weight on one side pushes the structure to its limits. Before long, you could be looking at warped walls, a damaged liner, or worse — a full collapse.
Think of it like driving with one flat tyre. It’ll get you down the road, but you’re asking for trouble.
The risk of structural collapse or wall bowing
When water pushes unevenly on the walls, they can start to bow outwards. The more it bows, the weaker it gets.
In the worst cases, the wall can give way entirely. That’s thousands of litres of water suddenly pouring out — not great for your garden, patio, or neighbour’s fence.
The impact on the pool liner and skimmer
Liners are designed to sit evenly. Stretch them too much on one side and they become brittle, rip, or spring a leak.
The skimmer can also struggle. If the water level is higher on one side, it won’t pull in debris properly. That means more floating leaves, more cleaning, and less time enjoying your pool.
How to Confirm Your Pool is Not Level
Using a long straightedge and a level
Grab a long, straight piece of timber or metal and rest it across the pool’s top rail. Pop a spirit level on top and see if the bubble sits dead centre.
Even a difference of more than an inch can be a sign you need to act.
Observing the water line
Sometimes, the easiest way is just to look. Stand back and check the water line against the walls.
If it’s kissing the top on one side and sitting well below the edge on the other, your pool is definitely off-kilter.
Step-by-Step Guide to Fixing an Unlevel Pool
The “No-Drain” Method for Minor Issues
How to raise the ground under a support post
If the tilt is tiny — less than an inch — you might get away with a quick fix. Gently lift the support post with a jack or similar tool, then pack sand, soil, or a shim underneath.
Check the level after each adjustment. Small tweaks can make a big difference.
When is this method a safe option?
Only use this method if the pool’s structure is sound and the tilt is barely noticeable.
If you try this on a badly leaning pool, you’re just papering over the cracks.
The Full Drain and Re-Level Method
Safely draining the pool
Big lean? No choice — the water’s got to go. Follow your pool manufacturer’s instructions to the letter.
Make sure you drain away from buildings, fences, or flowerbeds you actually like.
Repairing the base and re-levelling the ground
Once empty, inspect the base like a detective. Look for dips, lumps, and anything sharp enough to damage the liner.
Fill low spots with sand or soil and compact it firmly. Keep checking with a level — precision here saves headaches later.
Refilling the pool properly
When you’re happy with the base, reassemble your pool. As you refill, keep an eye on the level.
It’s easier to tweak now than when it’s holding several tonnes of water.
Keeping your above ground pool level isn’t just about looks — it’s about safety, comfort, and saving yourself from a repair bill that could ruin your summer. A little time spent now means more time floating, splashing, and enjoying your pool exactly as it should be: perfectly level.
Have you checked out our other posts?
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