Mar
2026
30
Guide to Identifying a Leak in Your Swimming Pool
A leak that goes undetected in your backyard swimming pool can lose water quickly and can cost you money when it’s time to refill, especially if the problem goes undetected or unaddressed. It’s common that during pool openings in Whitby, pool owners uncover leaks and holes in the liner. If you notice a leak or changes in your swimming pool water levels, contact Seaway Pools & Hot Tubs to explore your pool repair and renovation options to restore functionality to your swimming pool. Or, shop our selection of pool supplies online, where you can find some short-term leak solutions and products while you determine the best option for your swimming pool repairs with the award-winning experts at Seaway Pools & Hot Tubs.
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What Causes Leaks in Swimming Pools?
Most commonly, pool owners or technicians will discover leaks during or right after pool openings in Whitby because of changes in the ground over the winter into spring. The freeze-thaw cycle in Southern Ontario means that earth itself shifts and the ground freezes, causing water to expand. When the ground starts to defrost, it can reveal cracks from the stress on pool materials embedded in the earth.
In addition to the freeze and thaw, other factors that can contribute to leaks in the pool include brittle or aged liners, animal or rodent damage, damage from sharp or blunt objects, and mistakes with winterizing. At Seaway Pools & Hot Tubs, our experts always recommend professional pool maintenance services, including pool opening and closing, to preserve your pool as best as possible over the course of the winter and to protect your investment.
Where are You Most Likely to Find a Leak in Your Vinyl Swimming Pool
Leaks can happen in several areas, but some parts of the pool are more prone to leaks or damage than others. The liner is often a good place to check first, especially along seams, corners, and steps, where material may weaken over time. Around fittings such as skimmers, return lines, and drains are also common leak points due to movement or improper sealing.
You should also inspect areas around ladders and pool accessories where repeated use can cause wear. In some cases, leaks may develop underground in plumbing lines, which can be harder to detect without professional help. Keeping basic pool supplies like patch kits on hand can help you address small liner issues quickly while you assess the extent of the damage. However, if you’re having any trouble, contact the local pool service experts at Seaway Pools & Hot Tubs.
How to Identify a Pool Leak
If you suspect a leak, there are a few simple methods you can try before calling in professionals. One of the most effective is the bucket test which requires you to fill a bucket with pool water and place it on a step. Then, mark the water level inside the bucket and the pool and, after 24 hours, compare the levels. If the pool water drops more than the bucket, you likely have a leak.
You can also visually inspect your liner for tears or use dye testing near suspected areas to see if water is being pulled through a hole.
Trust Seaway Pools & Hot Tubs for Pool Repairs and Service
Addressing leaks early can help prevent further damage, reduce water loss, and keep your pool ready for the season. From identifying the source of the issue to providing long-term repair solutions, our pool service specialists are equipped to restore your pool efficiently. Whether you need repairs, maintenance, pool supplies, or a swimming pool renovation, the award-winning, trusted team of local experts at Seaway Pools & Hot Tubs is here to support you every step of the way.
