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Bailey Drain Tracing Dye Review: Trace leaks with neon visibility

Bailey 3591 Drain Tracing Dye - Yellow
4.8
[Water-Soluble]  Dissolves instantly for reliable, mess-free tracing.
[Flow Direction Detection]  Accurately identifies water flow direction in pipes and drains.
[Customizable Dilution]  Adjust dilution rates based on clean-water assumptions for precise tests.
[Multiple Colors]  Range of vibrant colours enhances visibility during testing.
[Versatile Application]  Suitable for diverse drain testing scenarios; dilution varies per litre.
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For home improvement, Bailey Drain Tracing Dye helps locate the direction of water flow in pipes and drains using a water-soluble formula. Seeing a bright neon-yellow trail when diluted brings reassurance and speed when diagnosing plumbing problems. Is a straightforward dye solution the fastest way to confirm a leak or blockage?

⚡ At a Glance
  • Visibility: Bright neon-yellow when diluted for clear flow tracing
  • Best for: Plumbers, DIYers and building inspectors who need to identify flow direction and locate leaks quickly
  • Not ideal for: Situations requiring dye-free or chemical-free testing methods

Water-soluble tracer designed to reveal flow direction in pipes and drains. Colour intensity depends on dilution rate and assumes addition to clean water.


Pinpoint leak sources, with a water-soluble formulation

Water-soluble formulation mixes readily with water to create a visible tracer; dilution rates determine colour strength and assume clean water for accurate guidance.

Quickly pinpoints leak origin during inspections, helping confirm the source and speed repair decisions.

Reveal flow direction clearly, with high-visibility colour

Designed specifically to show the direction of water flow in pipes and drains; diluted dye produces a bright trail that maps movement through the system.

Visual flow mapping helps identify which branch or section of piping is affected, simplifying diagnostic work.

Match test intensity to need, with adjustable dilution rates

Drain testing dyes vary according to dilution rate per litres of water; recommended dilution guidance assumes clean water for consistent results.

Adjustable concentration allows subtle tracing for large volumes or stronger contrast for pinpointing small leaks.

✨ The 4 Key Reasons for Bailey Drain Tracing Dye
  1. Water-soluble formulation - Dissolves readily for simple application and dilution control
  2. High-visibility neon colour - Produces bright yellow trails that reveal flow direction clearly
  3. Variable dilution rates - Adjust concentration to match inspection scale and water volume
  4. Range of colours available - Choose contrasting dyes for overlapping systems and clearer identification
📋 Technical Details at a Glance
  • Category: Home Improvement
  • Brand: Bailey
  • Product ID: B0041SW9PG
  • Solubility: Soluble in water
  • Primary use: Locate direction of water flow in pipes and drains
❓ Frequently Asked Questions

Q: How should the dye be used for tracing?

A: Dilute according to required dilution rates and add to water so a visible tracer is produced; dilution guidance assumes addition to clean water. Exact volumes are not specified in the provided information.

Q: Will the dye work in dirty or contaminated water?

A: Dilution rates assume the dye is added to clean water, so effectiveness in dirty or heavily contaminated water is not specified in the available information.

Q: Can the dye identify both flow direction and leak sources?

A: Yes. The dye is used to locate the direction of water flow in pipes and drains and has been reported by users to effectively trace leaks and identify the source.

🏆 Our Verdict

Ideal for plumbers, DIYers and building inspectors who need a quick, visual method to confirm leaks and map flow paths. High-visibility, water-soluble tracer produces bright neon-yellow trails when diluted, making flow paths obvious during inspections. A practical, low-fuss option that saves time on diagnostics and provides reassurance when checking plumbing.