EL07.JPG [7/15] Author: J. Stormer Source: 050930PP Copyright: 2005 J. Stormer Credit: J. Stormer Caption: Older Groco(TM) seacock. This has a rubber cylinder contianed in the bronze body. A "T" handle on the opposite side compresses the rubber tightening the seal. This pressure needs to be relaeased beforfe the handle can be turned. After about 20 years in our climate the rubber may harden and the seacock has to be replaced.