Radiator vent valve

A vent valve for use with a radiator comprising:

• a conduit adapted to be placed in fluid communication with a radiator, said conduit having a first portion, a second portion extending transversely therefrom and a hollow interior extending through said portions of said conduit;
• said hollow interior of said second portion of said conduit having a wide section of a first diameter, a narrow section of a second diameter less than said first diameter, and a tapered section disposed between said wide and narrow sections and having a diameter tapering between said first and second diameters, said narrow section being disposed below said wide section;
• said second portion having a threaded exterior and an upper edge;
• a cap having a threaded interior surface mating with the threaded exterior of said second portion and an upper interior surface with a hole formed therethrough, said cap being threaded down into said second portion;
• a nut supported on said upper edge within and beneath said cap and secured thereto by contact with said upper interior surface of said cap;
• a bolt having a head facing outward and a body extending inward through said hole, threaded into said nut and extending into the hollow interior of said second portion of said conduit said bolt having a length sufficient for its body to reach into said narrow section when said bolt is screwed downwardly through said nut;
• and
• at least one opening formed through said nut to provide a vent passage from said hollow interior of said conduit.