Lansas Vacuum Test 24" vacuum test Bladder. Use with the Engine Powered Vac Pump or the Air Venture Vac (for towable air compressor)

This vacuum test bladder is the choice for testing 24" manholes from inside the stack instead of on top of the stack like a plate style vacuum tester.  Note that this will not necessarily test the stack (riser rings) to the plate but does work well if the surrounding surface is higher than the top of the manhole.

also known as a vaccum, vacume, sewer manhole testing kit, man hole tester or manhole tester.