A professional grade tool with all brass construction. The "Force and Suction Pump" has dozens of uses on the job for HVAC Contractors, Plumbers, in Plant Maintainance, Farming and the Marine Fields. As the name implies the Force and Suction Hand Pump may be used to force solutions such as boiler leak stop, anti-freeze, cleaners, Inhibitors and lubricants into a Heating Boiler, Process Boiler, HVAC Unit Engine or Piping System under pressure, without shutting down the system. Use the suction pump to evacuate sump, distribution boxes, receiver pits, valve boxes, tanks, toilet bowls, traps and more.