Why Pool Leak Detection Matters

A pool that continually loses water can create much larger problems than a higher water bill. Water escaping from the pool or underground plumbing may wash away supporting soil, damage decking, affect nearby landscaping, create erosion, strain pool equipment, and increase chemical and heating costs.

Pool owners often notice the symptom first: the water level keeps dropping. The difficult part is determining why.

Possible causes may include:

• Cracked underground pool plumbing
• Leaking return lines
• Leaking suction lines
• Skimmer plumbing leaks
• Main drain plumbing leaks
• Pool light conduit leaks
• Loose or failed fittings
• Equipment pad leaks
• Filter or pump connection leaks
• Cracks in the pool shell
• Leaks around tile, skimmers, drains, or penetrations
• Evaporation mistaken for a plumbing leak

The purpose of professional testing is to narrow down the source before anyone begins breaking concrete, opening decking, replacing equipment, or excavating underground piping.

What Is Pool Pressure Testing?

Pool pressure testing is a diagnostic process used to evaluate whether an individual plumbing line can hold pressure. The line is isolated from the rest of the pool system and tested under controlled conditions.

When a properly isolated line loses pressure, the result may indicate that the tested line, fitting, connection, or component is leaking. When the line holds pressure, attention may shift to another part of the pool.

Pressure testing may be used to evaluate:

• Skimmer lines
• Main drain lines
• Return lines
• Cleaner lines
• Water-feature plumbing
• Spa suction and return lines
• Individual branches of the pool circulation system
• Accessible equipment and valve connections

Why a Master Plumber Should Evaluate Your Pool Leak

There is an important difference between operating a testing tool and understanding the plumbing system being tested.

A Texas Licensed Master Plumber has advanced experience with plumbing systems, pressure, water distribution, pipe materials, fittings, valves, testing procedures, diagnosis, repairs, safety, permits, and code-related requirements.

Steven Shipler is a Texas Licensed Master Plumber and Responsible Master Plumber, Texas License #45825. That experience matters because pool leaks often involve more than a visible crack or dripping fitting.

A qualified plumbing evaluation can help answer critical questions:

• Is the leak actually in the plumbing system?
• Which line or component is losing pressure?
• Was the line properly isolated during the test?
• Could a valve, plug, fitting, or test connection be affecting the result?
• Is the leak beneath concrete, soil, landscaping, or the pool structure?
• Does the entire line need replacement, or is a localized repair possible?
• Could excavation or repair affect another plumbing line?
• Does the proposed repair make sense based on the evidence?

The goal is not merely to announce that a line failed. The goal is to properly interpret the test, identify the likely source, and provide a sensible next step.

Signs Your Pool May Have a Leak

Some water loss is normal because of evaporation, splashing, backwashing, and swimmer activity. Persistent or unusual water loss may indicate a leak.

Warning signs may include:

• The pool requires frequent refilling
• The water level drops more quickly than expected
• The automatic fill valve runs continuously
• The water bill suddenly increases
• Wet soil or grass appears near the pool
• Decking begins shifting, cracking, or settling
• Air repeatedly enters the pump basket
• The pump loses prime
• Water appears near pool equipment
• Pool chemicals are difficult to maintain
• Algae returns because treated water is continually being replaced
• There is unexplained erosion near the pool or equipment pad

Pool Leak Testing Methods

Pool leak detection may require more than one testing method. The correct approach depends on the symptoms, pool design, equipment, plumbing layout, and accessibility.

Visual Inspection

The pool shell, tile line, skimmers, returns, lights, equipment, valves, fittings, drains, visible plumbing, and surrounding property may be examined for signs of water loss or damage.

Equipment Inspection

Pumps, filters, heaters, chlorinators, valves, unions, seals, drain plugs, and exposed connections may be checked for active or intermittent leaks.

Dye Testing

Dye may be carefully introduced near a suspected crack, fitting, skimmer, light niche, drain, or penetration to determine whether water is being drawn toward a leak.

Pressure Testing

Individual pool plumbing lines may be isolated and tested to determine whether they hold pressure.

Acoustic Leak Detection

Specialized listening equipment may help identify the sound created by pressurized water or air escaping from underground plumbing.

Line Isolation

Different portions of the pool system may be separated to determine which branch or component is associated with the water loss.

Electronic and Tracer Methods

Depending on the system and site conditions, additional electronic, tracer, or locating methods may be considered to narrow down the suspected leak area.

Our Pool Leak Detection Process

Pressure Loss Does Not Automatically Identify the Exact Repair Spot

A failed pressure test can confirm that a line is leaking, but it may not automatically identify the exact inch of pipe that has failed.

Underground plumbing can run beneath:

• Concrete pool decking
• Patios
• Landscaping
• Retaining walls
• Soil and fill material
• The pool shell
• Outdoor kitchens or structures
• Other utilities and plumbing lines

That is why the testing result must be combined with the plumbing layout, depth, pipe route, sound, surface conditions, equipment behavior, and the professional judgment of the person interpreting the evidence.

Why Guessing Can Become Expensive

Cutting pool decking or excavating the wrong location can become expensive very quickly. Concrete, tile, coping, landscaping, drainage systems, irrigation, utilities, and nearby structures may all be affected by unnecessary excavation.

A professional diagnosis helps reduce the risk of:

• Breaking concrete in the wrong place
• Replacing a plumbing line that is not leaking
• Replacing pool equipment that is functioning properly
• Repairing a visible symptom while missing the actual cause
• Performing multiple unsuccessful repairs
• Continuing to lose water after the work is complete

Questions to Ask a Pool Leak Detection Company

• Who will perform and interpret the testing?
• Is the person evaluating the plumbing a licensed plumber?
• Will each plumbing line be tested separately?
• How will the lines be isolated?
• What pressure will be used?
• How long will each line be observed?
• Will the findings be documented?
• Does the failed test identify the line or the exact leak location?
• What additional locating method will be used?
• What evidence supports the proposed repair location?
• Is excavation required?
• What concrete, tile, deck, landscaping, or restoration work is excluded?

Pool Leak Detection for Residential and Commercial Properties

Lone Star Leak Locators provides pool leak and pressure testing services for:

• Residential swimming pools
• Spas and attached hot tubs
• Rental properties
• Apartment communities
• Hotels
• Homeowner associations
• Fitness centers
• Schools
• Commercial pools
• Property management companies

What You Receive

Depending on the scope of the inspection, customers may receive:

• Visual pool and equipment evaluation
• Pressure-testing results
• Identification of lines that held or lost pressure
• Discussion of suspected leak areas
• Professional repair recommendations
• Master Plumber review of the plumbing findings
• A clear explanation of reasonable next steps

Frequently Asked Questions