It has been proposed a design method, construction, ZIP, operation and maintenance of a vacuum system HIFLOTM S. Helen based on a collaboration between INSULA Spa, and related consulting firms, Forma Urbis, Roediger Alan Hassett of the Company and Oak Hill Company. The main feature patented system HIFLOTM is that the input of air in the vacuum sewer is from a separate location from the input of the drainage.

Cycle of a conventional vacuum tube

The patent separates the air intake valve to the waste, speeding the closure of the latter, with the result that the scope of the system was more than tenfold. Also if there are spills or other accident, with a pipeline pressure flow mixed with water to leak out of the outwardly adjacent surface or ground water. The pipeline vacuum sealed by definition does not allow leakage; And, if you accidentally cause an exceptional event, a rupture along the pipe, vacuum system would begin to suck air, liquids or even solids through the breach along the way. It was realized a cost-extremely beneficial system and a preliminary design of the system.

Version 1 HIFLO ™ system proposed (blue) with the eight primary sumps (yellow) fed by gravity pipes (black)

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