My dad needs to repair a water leak on a property. This house has a long driveway (roughly 20 metres). But when he went there to have a look, there was no noticeable leak (water puddle etc). Bathroom & under the house have been checked thoroughly and there was no sight of any serious water leak. Currently there is about 0.8 ton of water lost per day due to this leak, which is not a small amount.
My question is that, is there any way we could detect where the water leak is without having to hire a plumber?
Is there any equipment that we could hire to find the source of the leak?