Vacuum Testers

None of the other available methods for testing manhole integrity are as quick, easy or accurate as vacuum testing. Vacuum testing establishes a differential pressure between the inside and outside of the manhole structure by reducing the internal pressure of the manhole. This simulates the same differential condition as having increased pressure on the outside of the manhole, which is exactly the condition that we want to ensure that it can withstand once it is put into service.

As a vacuum is drawn on the manhole each joint is pulled tighter together and the flexible connectors are stretched inward, providing realistic simulation of external groundwater head pressure This provides for a far more dynamic test of the structure than a simple water exfiltration test.

If the manhole fails the test, leaks can be easily located by spraying water on the exterior while still drawing a vacuum, and looking for areas that dry quickly on the outside or wet areas inside the manhole. Once the leak is identified repairs can be made by applying a quick setting patching material. By making the repair while continuing to draw a vacuum the patching material is pulled into the wall of the structure creating a far more effective seal.

The last two numbers in the model number indicates the hole size [S106-12WP]

For hole sizes 8" and smaller (wedge style)
use torque wrench P/N 91819 for tightening wedge (5 ft. lbs.)

106 vs. 406: 106 Connector is 8" long - 406 Connector is 6" long

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In-Plant Vacuum Tester
Tests 48 to 72 inch diameter bases, risers and cones with heights from one to five feet. Automated test sequence assures quick results, increased quality control and eliminates backcharges. Dual test station design allows for continous vacuum testing. Wireless remote control lets a single operator move the test head from one test station to the other and continously load, test and unload structures without ever getting off the forklift. Meets ASTM C 1244 test requirements.

Portable Vacuum Tester
Tests a manhole in less than 15 minutes. Instantly finds leaks allowing quick repair. Draws patching mortar into leaks making repairs far more effective. Equally tests the entire manhole structure. Eliminates water hauling and pumping. Ensures compliance with ASTM C 1244-93. Draws joints tighter together during test.