My pool is losing approximately 1/4-1/2 inch of water a day. When this leak was first discovered, I noticed that there was a lot of water around my gas pool heater and saltwater generator cell that is on the ground next to the heater. The heaviest amount of water is around the heater so I assume the heater is the source of the leak. It is an older Hayward H series gas heater that hasn’t been used in several years. I called a pool company about the leak and they can’t come until later this week to look at it. The person who answers his phone says that a leak in the heater couldn’t cause the pool to lose 1/4-1/2 inch of water a day when the heater isn’t being used, so I probably have another leak elsewhere? Is this true? Is there anyway to tell if the heater is the source of the leak or if the leak is coming from the pipes that lead to the heater and/or pump? I checked around the pump and backwash line and the ground around them is dry. If the heater is the only thing that is leaking, could it cause me to lose 1/4-1/2 inch of water a day when it isn’t being used?