Patent ID: 8220497
Filing Date: 2012-07-17
Classification: E03C,E03F,Y10T

Abstract:
1. A liquid blocking device for a plumbing trap that comprises a liquid glycol initially having a first volume which is a percentage of the total volume of said device and liquid water having a second volume which is a percentage of the total volume of said device, said glycol and said water being mixed together to provide an emulsion or similar combination thereof with said first and second volumes being combined to form substantially all of said total liquid volume of said device; said glycol being hygroscopic and said water being subject to evaporation so that when said device is exposed to the ambient atmosphere said glycol absorbs water from the ambient atmosphere at a first rate and said water evaporates water into the ambient atmosphere at a second rate; said first and second volumes each having a set percentage by volume of said total liquid volume that respectively removes water from the ambient atmosphere at a first volume rate and evaporates water to the ambient atmosphere at a second volume rate with the actual volumes of water being evaporated and being absorbed are substantially equal whereby the total volume of said liquid blocking device remains substantially constant.