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Leak Business Academy, LLC -- Diagnostic Series

What Is the First Step in Diagnosing a Pool Leak?

The first step is not a tool. It is a conversation. Before dye, pressure gauges, or hydrophones come out, the technician needs to hear the story of the water loss -- because that story points to the answer.

Jeff David
Founder, Leak Business Academy, LLC
Licensed Pool Contractor -- Florida
Direct Answer

The first step in diagnosing a pool leak is to hear the customer and gather the water-loss history. Before using any tool, the technician needs to know when the leak started, how much water is being lost, whether the loss changes with the pump on or off, whether an autofill is hiding the loss, and what changed recently.

Good leak detection starts with questions -- not tools.

Key Questions to Ask First

These are not small talk. Each answer narrows the investigation before a single test begins.

When did the water loss start?
How much water is lost per day?
How often do you add water?
Is there an autofill? Is it running constantly?
Did you do a bucket test? What were the results?
Does the pool lose more with pump ON?
Does the pool lose more with pump OFF?
Does the water stop dropping at a certain level?
Are there wet spots near the pool?
Is there air in the pump or loss of prime?
Any recent repairs, resurfacing, or deck work?
Any recent equipment changes?
Is there an attached spa?
Are there water features?

How History Narrows the Search

The answers to these questions build a working theory before any test is performed. They do not prove the leak -- but they tell the technician where to look first.

Reading the Clues
What the History Points Toward
More loss with pump ON
Pressure-side plumbing, returns, equipment, water features
More loss with pump OFF
Structural leak, suction-side, skimmer, light conduit, drain
Water stops at skimmer level
Skimmer throat, skimmer body, nearby shell
Water stops near a light
Light niche, conduit, nearby shell crack
Autofill running constantly
May be masking the true water-loss rate
Recent resurfacing or deck work
Fittings, lights, drains, structural movement

What Comes After History

1
Understand the pool layout -- type, skimmers, returns, lights, drains, equipment, water features.
2
Inspect the equipment pad -- pumps, valves, heater, filters, unions, backwash line.
3
Confirm water-loss behavior -- review or perform a bucket test if needed.
4
Perform visual inspection of all likely areas identified from history.
5
Dye test specific suspect areas with still water.
6
Pressure test plumbing circuits when indicated.
7
Use acoustic or advanced tools only when the investigation justifies them.

Common Mistakes That Skip This Step

Starting with dye testing before hearing the history
Starting with pressure testing without understanding the system
Not asking about autofill -- misses the real water-loss rate
Not asking about pump-on vs. off -- misses the first big clue
Not asking about recent repairs or construction
Not writing down the customer's answers
Trusting the customer's guess without verifying with evidence

Jeff David's Perspective

From the Founder -- Leak Business Academy, LLC

Before I put a single piece of equipment in the pool, I know roughly where the leak is -- or at minimum, where to look first. Not because I guessed. Because I asked the right questions. The customer who tells me the pool stops dropping near the light elevation just saved me from pressure testing four plumbing circuits that were never going to be the problem.

At Leak Business Academy, LLC, we call this the H in the H.U.N.T.E.R. Method. Hear the customer and history. It is the first step -- and it is the step most beginners skip because they are in a hurry to look productive. Slow down. The history is the first diagnostic tool you have, and it does not cost anything.

-- Jeff David, Founder | Leak Business Academy, LLC | Leak and Subsurface Locators, LLC

Final Answer

Hear the History -- Then Test the Theory

The first step in diagnosing a pool leak is to hear the customer and gather the complete water-loss history. Ask when it started, how much is being lost, whether the autofill is running, whether loss changes with pump on or off, whether water stops at a certain level, and what recent work was done. That history narrows the search before any tool is picked up.

Good leak detection starts with questions. A professional builds a theory from history -- then uses tools to confirm or reject it.

Learn to Diagnose Like a Professional

Leak Business Academy, LLC teaches the H.U.N.T.E.R. Method -- a systematic diagnostic process that starts with the right questions and ends with documented, defensible findings.

View Training Courses The H.U.N.T.E.R. Method
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