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Sprayer only sprays at low pressure

Weak spray is usually a partially clogged shut-off or nozzle, or a pump that has not fully primed. Depressurize, clean the shut-off and nozzle, and let it prime.

Updated June 3, 2026

Applies to:

FGI battery and manual sprayers (Smith Performance, DEWALT, CRAFTSMAN, LESCO, and others).

What causes this:

The sprayer runs but only produces a weak, low-pressure spray. The shut-off or nozzle is usually partially clogged, or the pump has not fully primed.

  • A partially clogged shut-off assembly
  • A partially clogged nozzle
  • A pump that has not fully primed

How to fix it:

  1. Depressurize the sprayer.
  2. Clean the shut-off assembly, removing debris from inside the fitting and filter.
  3. Clean the nozzle: remove and disassemble it, then rinse the openings with clean water.
  4. Allow at least 30 seconds for the pump to fully prime after turning on.
  5. For manual sprayers, also check the dip-tube filter inside the tank for clogs.
  6. If low pressure continues, the pump may need service; call 1-800-311-9903.

Still stuck? Call us at 1-800-311-9903 or send a message. Monday to Friday, 8AM to 5PM EST.