The Air-Loc manhole testing system allows you to test manholes within minutes. It provides immediate leak detection, before or after ring installation and backfilling, while also eliminating expensive/time-consuming water tests. Manhole testing is performed by creating a vacuum in the manhole and monitoring a gauge for vacuum loss. The head assemblies are made of lightweight aluminium, making them the lightest units available.
The Cherne vacuum pump draws 10″ hg at a rate of 15 CFM and features an oil-free graphite vane pump – no cumbersome lubrication system. Cherne’s pump also offers aluminium filter jars – will not break like competitor’s glass jars. The vacuum pump draws 10″ hg vacuum in approximately 2 minutes for a 15′ deep manhole.
The plate style tester seals the surface of the manhole frame or cone. It has a 1″ neoprene gasket to ensure a leak-free seal. Sealing a wide range of manhole diameters makes this a very versatile product.