JACOBS LL AIRY LE by Ease in balancing steam heating systems isa twist away. 5 Gassing orifice that will adjust to alien for seamless system balancing. Adjusts current Jacobs sizes. i The Jacobs? adjustable orifice cap will convert existing vents, or can be ordered on new vents, ito give the user the ability to adjust on the fly Phish balancing their stein heating system. This fern can replace the need for ordering multiple sized vents and carrying additional stock.
