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An air gap drain module for use with the dispensing head of a reverse osmosis dispensing system for potable water has an inner waste water tube and an outer drain tube which are disposed concentric to each other at one end and for a portion of the length of the inner tube adjacent the concentric end

An air gap drain module for use with the dispensing head of a reverse osmosis dispensing system for potable water has an inner waste water tube and an outer drain tube which are disposed concentric to each other at one end and for a portion of the length of the inner tube adjacent the concentric end. An air gap in the form of spaced slots is provided adjacent the concentric end of the drain tube and a closure is connected to the common end of the waste water tube and drain tube with an annular flange or skirt thereon in assembled position disposed to extend between the waste water tube and the drain tube to form an annular passage about the waste water tube and direct the movement of process water issuing from the concentric end of the waste water tube into the drain tube. The closure forms a chamber or trap with the adjacent end of the waste water tube which in conjunction with the spaced slots prevent back flow into the waste water tube. The dispensing head is modified to provide a bore therein to permit the air gap drain module to be removably assembled therein.

대표청구항 ▼

An air gap drain module for a reverse osmosis potable water system comprising: a. main body having a control valve bore and a dispensing spout bore, and an auxiliary bore extending end to end therethrough; b. A waste water tube connected at one end to said reverse osmosis system and having an opposi

An air gap drain module for a reverse osmosis potable water system comprising: a. main body having a control valve bore and a dispensing spout bore, and an auxiliary bore extending end to end therethrough; b. A waste water tube connected at one end to said reverse osmosis system and having an opposite upper end, c. a drain tube having an end connected concentric in surrounding relation to at least a portion of the opposite upper end of said waste water tube, and said drain tube including an opposite end remote from the concentric end thereof and communicating with waste disposal means, d. an end closure connected to the concentric end of said drain tube, e. means on said end closure for directing waste water issuing from said waste water tube to drain through said drain tube to the waste disposal means, said means on said end closure including a first portion positioned above and centrally with respect to the opposite upper end of said waste water tube for changing the direction of flow of waste water issuing from said waste water tube and directing said waste water issuing from said waste water tube to drain through said drain tube to said waste disposal means, and f. means for inhibiting flow of waste water from said drain tube to said waste water tube by providing an air chamber between said opposite upper end of said waste water tube and said first portion, said means for inhibiting including sized slot means in the concentric end of said drain tube which forms an air gap for said air gap drain module.