Finding a leak in the vinyl liner of your swimming pool can be a difficult task. Most of surface area of the surface area of the liner is underwater making it very difficult for close visual inspection. If you have traced the leak through diagnosis to be located in the liner, then the most efficient way to find the leak now is to check the most common vinyl liner leak locations.
Before you spend any time looking for the leak you should consider what could have possibly caused this leak as this could help you to focus in on one particular aspect of the liner. Check the ladder in your pool to ensure that there is rubber bumpers protecting the bottom stainless steel tubes from cutting the liner. This is one of the most common leak sources since the bumpers tend to warp and deteriorate with age increasing the likelihood of them falling off.
Next be sure to check anything that goes into your swimming pool for signs of damage or any physical hazards that could pose a threat to your liner. This would include skimmer nets, poles, vacuum heads, automatic vacuum cleaners and pool toys. You can also check your hose to make sure that it does not have any hose clamps or sharp burrs which could damage the liner when you are topping off the water in your pool.
Once you have ruled out the items that are used in maintaining and using your Stahlwandpool you can consider any location that is inclined to leak such as skimmer gaskets, return gaskets, light gaskets and especially stair gaskets. Inspect the screws on these face plates to ensure that the leak is not in these locations as opposed to being a hole in the liner itself. Excessive rust or loose screws are a sure sign that there is a leak present in this area.
If the leak is in a random spot somewhere in the liner you would perform a visual inspection beginning at the top of the walls and progress around the edge of your pool perimeter. A small hole in the liner will often represent itself as a ¼" long smile or crescent in the liner. Often these holes in vinyl liners can be felt with your fingertips easier than by sight - especially when on the walls.
Most vinyl liner swimming pools have galvanized steel walls which will rust when in constant contact with chlorinated water such as with a leak in your liner. Rust will form on the walls around any location where there is even a tiny leak present given enough time. You can inspect the walls of your pool by sight and by feel for areas that are rough - an indication that there is a leak close by and rust is beginning to form. You can also perform a dye test which will help you to identify possible leak points in your pool.