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How to order a replacement pump assembly or Pump Zero head

When the pump motor fails, the pump assembly may need replacing. Rule out battery, charger, and priming issues first, then call with your model number.

Updated June 3, 2026

Applies to:

Battery-powered sprayers using Pump Zero technology (Smith S103 series, DEWALT, CRAFTSMAN, Scotts, LESCO, and other lithium-ion models).

What causes this:

The pump assembly is the integrated motor, pump head, and battery housing on most modern FGI battery sprayers. When the motor fails, leaks internally, or no longer holds a charge, the assembly may need to be replaced. Confirm the issue is the pump itself before ordering.

How to fix it:

  1. First rule out simpler causes. Verify it is not a battery, charger, residue, or priming issue before ordering a pump.
  2. Find your model number on the label on the tank or pump.
  3. Check whether the sprayer is still under warranty (typically 1 to 3 years from purchase). If covered, file a warranty claim; the replacement pump may be free.
  4. If out of warranty, call 1-800-311-9903 with your model number and we will confirm the correct pump assembly and pricing.
  5. Have ready: model number, approximate purchase date, a short description of the failure, and your shipping address.
  6. For the Smith S103 series (S103, S103E, S103EX), ask specifically about the Pump Zero replacement head, the most commonly replaced part on these models.
  7. Pump assemblies typically ship within 3 to 5 business days, with installation instructions included.

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