The most direct way, if you know the location of the leak, is to collect the water over a measured amount of time...say one hour... and then measure the actual amount of water collected. You will then know how much water you are losing per hour, and you can calculate how much you will lose over longer or shorter periods of time. For instance, if you lost 1 gallon in 1 hour, you will lose 3 gallons in 3 hours, or 1/2 gallon in 1/2 hour.
If you cannot locate the actual leak, you will need to determine how much water enters the pipe at the source, and then measure the amount of water exiting the pipe at the other end. The difference will be the amount lost, and you can do the same sort of calculations.
1. Replace the pipe, 2. Shut off the water
Brake it down
Because you have a leaky pipe joint or a bad pressure tank.
I cut out the offending part and replace it with an appropriate pipe and couplings. Patching is 'Mickey Mouse' and will not last.
it would be a leaky water pipe, the bath tub, or maybey the toilet
Clamped
It is usually rain water that has seeped through the roof, or it could be a leaky pipe or boiler.
Often it's a rotted pipe or a leaky hose or a leaky water pump. Usually is't best to look at it and see where the coolant is coming out, then repair it.
Instead of an irrigation ditch, use an underground leaky pipe.
There are a number of tools that a plumber should have while dealing with a leaky pipe. A screwdriver and a wrench are the most important, and a roll of tape never hurts.
The Australian coroner's report blamed it on heavy rains and a leaky water pipe causing soil creep. Eighteen people died in the landslide.
The water in your pipes is under pressure so that it comes out of the tap when you turn it on. If there is a hole in the pipe (i.e. a leak) then the water will come out under pressure, the same as if you turned on your tap - if this hole faces upwards then there will be a jet or water like a fountain. The height of this jet is dependant upon the pressure of the water