Make sure the air valve cap is well closed.
Fill the tub with air, then make sure that the air valve base is well tightened, please refer to chapter "Spa Air Valve Attachment".
When storing or folding the tub, wrinkles develop. Very often the whirlpool is also stored in colder rooms (for example cellar compartment, etc.)
When the spa tube is inflated for the first time, the material takes a certain amount of time to stretch or adjust to the ambient temperature. Therefore, the pool must be pumped several times when first used.
Put liquid soap and water in a squirt bottle and spray on seams. If there is a leak it will bubble.
After you find the leak, clean and dry the leaking area, then apply the repair patch that comes with your spa.