10-35-018 Double check valve 5 qty 2 10-35-5057 Double check valve 1 qty 1 10-35-5059 Double check valve 1 qty 1 10-35-5061 Double check valve 2 qty 2 10-40-019 Double check valve 15 qty 1 10-40-019 Double check valve 20 qty 1 10-40-8100 Double check valve 20 qty 1 10-40-8100 Double check valve 25 qty 1 10-40-8102 Double check valve 6A qty 1 10-40-8102 Double check valve 13B qty 1 10-40-8102 Double check valve 6B qty 1 12-15-027 Double check valve 4 qty 1 12-15-004 Double check valve 4 qty 1 12-15-5086 Double check valve 13 qty 1