SAFETY HOLE FORMING A GASEOUS PRODUCT PREVENTIVE SIPHON

摘要

OF THE DISCLOSURE The safety hole forming a gaseous product preventive siphon for dangerous equipments buried into the ground comprises a vat, a cover closing the vat and being centrally provided with a vertical partition wall having a bottom portion placed at a determined height from bottom of the vat. The vat is filled with a neutral liquid at a level substantially higher than the bottom portion of the vertical partition wall thus forming an upstream compartment and a downstreamcompartment.