Tool Pump for Hoover PowerScrub 50 Steam Vacs. If your unit is leaking on the right side when you put a tank of water on it, it is most likely the (white) tool pump that is the cause. Leaking is usually at the hose connection plate. Another possible leak could be the tool valve itself. Models include FH50130, FH50140, FH145, FH50150, FH50151, FH50152, & FH50153. When sold out the price will show $00.00 03/09/23 dda