There are several steps you can take to try to locate a leak in your pool. There are several areas where your swimming pool may leak:

• In and around the pool equipment (pump, filter, heater,etc)
• At fittings (skimmers, returns, lights, etc)
• In the shell or liner of the swimming pool
• In the pool's underground plumbing system

Any leaks in the underground plumbing will require professional attention; however, you may be able to find obvious leaks in other parts of the pool using simple visual inspection techniques.

 Check for signs of moisture or drips around the pool equipment. Also check to make sure that your multi-port valve is not positioned to allow water loss to waste.

Underwater leaks in the pool shell or fittings can be identified with a dye test. You can make your own dye tester by using some dark food coloring and a turkey baster or a plastic syringe. If using a baster, slowly depress bulb to allow a slow steady stream of the dye to be injected into the pool. A Dye Tester allows placement of a small amount of colorant near (within ¼") a suspected leak. Liquid follows the path of least resistance so dye will be drawn out of the pool where there is a leak. Start by testing suspect areas such as cracks in the tile or plaster, and places where return fittings, skimmers or stairs join to the pool shell. Much of this testing can be done from the pool deck; however, you will eventually have to get into the pool with a dive mask to completely inspect the structure of the pool.

Don't be discouraged if you can't find anything; most leaks are not visibly obvious, or may be in parts of the pool (such as the underground plumbing system), that are inaccessible. A qualified pool leak professional utilizing specialized equipment should be able to find a leak anywhere in your pool within an hour or two (some complicated jobs may take longer).