Unable to fill or pressurize the pot with water.

  • Open the air supply valve.
  • Make sure the air compressor is capable of supplying the minimum air flow requirement for your system (see Technical Specifications in manual).
  • Make sure the air inlet pressure gauge reads 100-150 psi (6.8–10.3 bar, 0.68–1.03 MPa).
    • If the gauge does not read 100-150 psi, check the air compressor for proper setup.
  • Make sure the air inlet filters are clean, and replace if necessary

Systems with water tanks:

  • Make sure the water tank is full and the inlet ball valve is open.
  • Clean or replace water inlet filter if necessary.
  • Make sure all fitting connections are tight.

Systems with pressurized supply connection:

  • Make sure the water supply connection is connected and pressurized.
  • Check that the water supply meets appropriate pressure and flow requirements (see Setting Up the
  • Equipment in manual).
  • Make sure all fitting connections are tight.
  • Check inlet water pressure regulator for proper flow direction installation (see Parts in manual).
  • Check the inlet water pressure regulator screen filter for debris, clean if possible.
  • Replace regulator if no flow can be passed through the regulator.
  • Make sure the water inlet pressure regulator is not used if siphon feeding or using an external water tank.
  • Disengage the blast control switch.
  • Adjust the pump inlet air pressure regulator until the pump air pressure regulator gauge reads 50 psi (3.4 bar, 0.34 MPa).
  • If you are unable to attain this setting, check the air inlet filters and make sure the supply air pressure is greater than or equal to 50 psi.
  • If the above steps do not resolve issue, replace the pump air pressure regulator.
  • Rotate 3-way selector valve to WASH position.
  • Verify that pump stalls.
  • If pump continues to creep or will not prime, refer to
  • manual 3A5023 for pump service.
  • Make sure the pop-up is clean and free of debris in the o-ring sealing area.
  • Check for proper pop-up alignment in the closed position (there should be no gaps between the o-ring and the pop-up).
  • Remove the o-ring and make sure the o-ring gland is clear of debris.
  • Replace the o-ring and/or pop-up if worn.
  • Adjust the water pressure regulator until the pot pressure gauge reads 185 psi (12.75 bar, 1.275 MPa).
  • If this adjustment is not possible, service the water pressure regulator (see manual 309474).