Maintenance Products


Mokon's Leak-Master negative pressure system stops leaks in molds and processes without stopping production. This easily connected, portable unit controls water leaks and flow by means of a progressive cavity pump. The system "pulls" rather than "pushes" the water through the process. Instead of water being forced out, air is drawn into leaking areas around faulty "O" rings, holes in pipes or cracks in molds. Essentially, the system creates a vacuum to effectively stop the leak, so there is no need to shut down production for a mechanical repair.

The Leak-Master can be installed quickly for emergency use or as a standby for intermittent use.


The Leak-Master can be connected to any process circulating water system. It can be used in conjuction with a direct water supply, a temperature control system or as a booster pump to an existing water system where head losses cause processing problems.

  1. Suction and discharge pressure gages, on/off switch and indicating lights mounted in operator-friendly orientation
  2. Low pressure switch
  3. Vent
  4. High pressure switch
  5. Regulator valve adjustment
  6. Strainer
  7. Process, drain and supply connections
  8. Progressive cavity pump
  9. Copper piping
  10. Direct drive T.E.F.C. motor

Additional Features

  • Meets NFPA 79 electrical safety standards
  • UL 508A labeled electrical sub-panel
  • Portable, easy to connect
  • Suitable for continuous or intermittent use
  • Nonferrous piping
  • Extended warranty
    • 1 year on system

The Leak-Master can be easily installed to your leaking process. To control the leak and flow of water to your process, the regulating valve is simply adjusted from the outside of the cabinet without the need for tools. Casters allows for complete portability.

Model Pump (Hp) Flow Rates (GPM) Voltage Total Amps Process Connections Supply/Drain Connection Dimensions L x W x H * Shipping Weight (approx. lbs)
NP1000 1/2 9 110V/1PH/50-60HZ 7.4 1″ NPT 1″ NPT 28″ x 16″ x 25″ 110
NP2000 1/2 9 230V/1PH/60HZ 3.7 1″ NPT 1″ NPT 28″ x 16″ x 25″ 110
230V/3PH/60HZ 2
NP4000 1/2 9 460V/3PH/60HZ 1 1″ NPT 1″ NPT 28″ x 16″ x 25″ 110
NP1100 1 1/2 24 110V/1PH/50-60HZ 12.4 1 1/2″ NPT 1 1/2″ NPT 32″ x 17″ x 28″ 170
NP2100 1 1/2 24 230V/1PH/60HZ 6.2 1 1/2″ NPT 1 1/2″ NPT 32″ x 17″ x 28″ 170
230V/3PH/60HZ 5
NP4100 1 1/2 24 460V/3PH/60HZ 2.5 1 1/2″ NPT 1 1/2″ NPT 32″ x 17″ x 28″ 170

Temperature range: 10°F to 180°F (-12°C to 82°C)

*Height does not include regulator valve adjustment – allow for 4″

Leak-Master systems are available in other voltages. Please contact Mokon for more information.