Kohler 1144925 Pressure Balance Repair Kit Kohler 85500 Stem Assembly for 3/4-Inch Valve The new K-2971-KS supersedes the K-306-KS valve and features a redesigned pressure balance module to provide superior resistance to mineral deposits and aggressive water conditions combined with simplified installation and maintenance. The new valve utilizes existing K-306-KS valve trim and is dimensionally identical for simplified conversion to the new design. MFG Model # : K-2971-KS-NA MFG Part # : 2971-KS-NA