Insecticides for use in killing fleas and ticks; Insect growth regulator for use on dogs

LIQUID LEVEL CONTROLS

LIQUID LEVEL CONTROLS, LIQUID PRESSURE CONTROLS, TEMPERATURE CONTROLS FOR LIQUIDS, COMBINATION LEVEL CONTROLS AND ALTERNATORS FOR CAUSING ONE PUMP TO OPERATE WHEN LIQUID RISES TO A CERTAIN HEIGHT AND FOR CAUSING A SECOND PUMP TO OPERATE WHEN THE LIQUID AGAIN RISES TO THE SAME HEIGHT