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Graco 165843 Poppet

Graco 165843 Poppet — OEM valve element used in select pump lowers. Verify with your model’s parts diagram before ordering.

  • Function: one-way sealing/check action in fluid section
  • Part No.: 165843 (poppet only; seats/seals sold separately)
  • Typical location: valve body/pump lower on compatible airless sprayers
  • Replace if you see hard priming, pressure loss, or backflow
  • Match the exact number in your manual to confirm fit

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Part Overview & Fitment Guidance

The Graco 165843 Poppet is an OEM valve component used within select Graco pump/valve assemblies to control one-way fluid flow and sealing performance. Because Graco uses different pump lowers across models and revisions, exact fitment depends on your sprayer’s pump lower/exploded-view parts list.

Key Details

OEM Status Genuine Graco replacement part
Part Number 165843
Component Type Poppet (valve element) for pump/valve assemblies
Typical Location Within the fluid section/valve body of select airless sprayer pump lowers

What It Does

  • Acts as a check/sealing element to maintain correct one-way flow.
  • Supports consistent pressure and minimizes backflow in the pump cycle.
  • Restores proper priming and spray performance when the original poppet is worn or damaged.

How to Confirm Fit Before Purchase

  1. Check your model & serial on the sprayer’s data plate.
  2. Open the sprayer’s parts manual (pump lower / valve section) and confirm the poppet line item is listed as 165843.
  3. If unsure, provide your model/serial to support to cross-check the pump lower revision and confirm this poppet is specified.

Installation & Maintenance Tips

  • Work with a clean bench—any debris can compromise sealing.
  • Inspect mating valve seat/plate for wear; replace related seals if required.
  • Reassemble to the torque and orientation shown in your model’s exploded diagram.
  • Flush and pressure-test after installation; check for prime retention and leaks.

Frequently Asked Questions

Hard priming, loss of pressure at the gun, pulsation, or material creeping backward into the intake side can indicate a worn or nicked poppet or seat. Inspect both parts and related seals.

This listing is for the poppet only unless your parts manual specifies a kit number that bundles seats/plates/O-rings. If your diagram calls out a kit, order the kit to ensure all wear parts match your pump lower revision.

Use your exact model/serial to open the pump lower/exploded view in the parts manual. The poppet line item must show part number 165843. If the drawing lists a different number, this poppet will not fit that configuration.

Only where the pump lower/valve assembly specifically calls out 165843. Graco uses multiple valve designs across series and revisions, so always match part numbers in your manual rather than assuming cross-series fit.

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