Thomas C. Wilson Tube Tools
Follow LinkedIn Twitter YouTube

Get a Quote

Vacuum Leak Detector

For Condensers, Heat Exchangers and
Other Tubular Pressure Vessels.

Vacuum Leak Detector for 1/4 to 3-Inch Outer Diameter Tubes


Wilson's Vacuum Leak Detector

Wilsonís Vacuum Leak Detector in action

Thomas C. Wilson's Vacuum Leak Detector (VLD) is a simple test instrument used to identify leaky tubes ranging in size from 1/4-inch to 3-inch outer diameter. Manufacturers and users of condensers, heat exchangers and other tubular apparatus depend on the Vacuum Leak Detector to accurately pinpoint costly leaks the first time, every time.

Kit 9836 Includes Part No.
Vacuum Leak Detector 42823
Assembled with Nozzle 41460-1003
Hose Assembly 12-Foot 24360-0012
T-Handle Tube Plug 42834-1003
Carrying Case 42837
Service Manual SM-158

The Vacuum Leak Detector can be used with accessory parts, including the Wilson Tube Plug Snap for 3/8 to 2-inch (9.5–50.8 mm) Outer Diameter. Additional nozzles are available from 1/4 to 3-inch (6.4–76.2 mm) Outer Diameter and nozzle extensions are available from 5/8 to 2-inch (15.9–50.8 mm) Outer Diameter.

How It Works

One person can easily do the job. He or she just seals the far end of each tube with a snap-type tube plug, presses the Vacuum Leak Detector’s rubber-coated nozzle into the near end of the tube and depresses the trigger. Compressed air flows through a venturi chamber to produce a vacuum in the tested tube. When this vacuum reaches a satisfactory level, he releases the trigger. A steady gauge reading indicates a good tube. A falling vacuum indicates a leaky tube. Using 90 psi dry, clean air, it only takes six to eight seconds to test a typical tube (1-inch Outer Diameter x 20 gauge and 20 feet long) with the Vacuum Leak Detector. The tool weighs 2 1/4 lbs. and is equipped with a muffler, so it operates quietly even in confined areas.

Click to view demonstration

Snap Type Tube Plugs and Accessory Parts

Tubes that can be tested with Wilson's Vacuum Leak Detector

Snap head for Wilson's Vacuum Leak Detector
Tube Plug Snap Type
ID Part No.
Inches (mm)
3/8 (9.5) 41482
7/16 (11.1) 41483
1/2 (12.7) 41484
9/16 (14.3) 41485
5/8 (15.9) 41486
1 1/16 (17.5) 41487
3/4 (19.1) 41488
1 3/16 (20.6) 41489
7/8 (22.2) 41490
1 5/16 (23.8) 41491
3 1/32 (24.6) 41492
1 (25.4) 41493
1 1/8 ( 28.6) 41494
1 1/4 (31.8) 41495
1 3/8 (34.9) 41496
1 1/2 (38.1) 41497
1 5/8 (41.3) 41498
1 3/4 (44.5) 41499
1 7/8 (47.6) 41500
2 (50.8) 41501
Additional Nozzles* Available Part No.
Nozzle for 1/4 to 3/4-Inch OD Tubes 41460-1002
Nozzle for 5/8 to 1 1/4-Inch OD Tubes 41460-1003
Nozzle for 1 1/8 to 2-Inch OD Tubes 41460-1004
Nozzle for 1 7/8 to 3-Inch OD Tubes 41460-1005

*To be ordered in pairs (2) when T-handle is used.

Snap Head with T-handle for Wilson's Vacuum Leak Detector

Nozzle Extensions: Part No.
For 5/8 to 1 1/4-InchTubes 12-Inch Lg 41461-3012
For 1 1/8 to 2-InchTubes 12-Inch Lg 41461-0012
For 1 1/8 to 2-InchTubes 24-Inch Lg 41461-0024