Yesterday's monthly water account was 950 baht, never gone over 350 previously.

No taps on in the house, and the water meter is ticking over slowly.

We've been eight years in the house (new build for us 2018) I have no idea where the pipes run and it's all concrete the side of the house where the meter is, guessing pipes run up the side of the garage to the laundry, bathroom, then the length of the house to the kitchen.

We're not in a city - rural town of 9000. Three weeks ago the town switched over to a new improved water system - a big and very noticeable increase in water pressure so maybe we'd already had a slow leak before then.

Reluctant to let some clown loose to smash his way along the concrete in search of the leak.

In a place where tradesmen plumbers know what they're doing, how would the leak area be identified?

Thankyou!

You are saying that the meter continues to run, with everything off, correct?

If so, turn the main off going into the house, and see if the meter still runs.

Next, try a dye test in each of the toilets.

Of course, look for damp areas.

My wife put a blue thingy in the toilet cistern wrapped in a plastic net. After the blue has disappeared the plastic net got stuck in the flush valve so the cistern never filled completely and kept the water running.

Local PWA have guys with mechanical listening sticks. They are quite efficient at finding leaks under roads/concrete walkways et al.

1 hour ago, gomangosteen said:

. . . . how would the leak area be identified?

Acoustic detectors (available on Lazada).