If you are looking for a leak, and you can build up the pressure inside the thing, there are two ways you can find the leak pretty effectively. You can either submerge the object under water (if it won't damage the object), and look for bubbles rising through the water from the leak. This is very effective for finding leaks in inner tubes and tires, for instance.
If the object can't be submerged underwater for some reason, then apply a little soapy water to the areas that you suspect the leak to be. If you see soap bubbles growing, that is where the leak is!
A leak probably wouldn't cause a "sudden" drop in pressure. It sounds more like the system has more users than it can supply and pressure drops when someone else turns on their shower or flushes their toilet.
The same as anyone else. Use it to find out the atmospheric pressure
Pressure = Force/Area.
You might use the definition of pressure: pressure = force / area.
Reference pressure less the height.
I use a leak down tester that applies air pressure from an outside source to the cylinders.
with the use of skilled professionals to dive the pool and pressure test the lines
If you do not visibly see a coolant leak, have the cooling system pressure tested. If the leak is not obvious it could be internal.
A pressure test is done to locate a leak if you can't visually see where it is coming from.
Plumbers have tools to help them find leaks. Putting air pressure through the pipes can help them to find a leak in the wall.
Have the coolant system pressure tested, the pressure test will increase the coolant leak.
Pressure test
Coolant leak, possible heater core. Suggest to have it pressure tested to find leak.
Pressure test the cooling system Monitor antifreeze level
Pressure test the system and repair the leak. Do not use a stop leak.
Mine is in the timing chain cover gasket. You can find your leak by pressure testing your coolant system.
There is a tool you can put in the inlet. When you apply pressure, a leak will show. If it is internal, the level of the fluid will go down.