is it condensation possibly.
There must be a leak in one of the pipes in you house.
By applying pressurised water at one end of the pipes. The water leak can be found out and it can be sealed by using adhesives.
First, When does it leak water? Does it leak water when it is filling, when it is draining, or when it is just sitting there full of water, or is something else going on? Where outside the tub is the leak?
Call a leak detection company like American Leak Detection, if there is a leak they can locate with detection equipment..
Of course you can, but think of what you will do if there is a leak.
Water expands when it freezes. If water pipes are allowed to freeze then the pressure of the expanding ice inside them will fracture the pipes. Then when the temperature rises so that the ice melts, the pipes will leak - with resulting damage.
No, but you MUST deal with the leak first
Why? sometimes it has a leak, or the pipes are loose, or even some times there is extra water in the fosset that drips out.
Any break or leak on the suction side of your pump can cause air in the lines.
NO
Sounds like you need a plumber. Perhaps the pipes to the water main to your house have broken. Check your meter with no water running to see if the meter is moving. If so, there is a leak.
Water leaks can be tricky. If water is visible on a wall then it could be necessary to cut into the wall to find a leak. Listening in a very quiet house may allow you to hear a spraying leak. If a leak is suspected because of a high water bill, look at the water meter. The small dial moves when water runs. Shut off cut offs under the sinks and toilets and the water should stop running. Turn them on one at a time and watch until the meter tons again. There is your leak.