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Graco 102857 O-Ring Packing

The Graco 102857 Packing O-Ring is a genuine PTFE seal designed for Dura-Flo pump lowers to prevent leakage and maintain consistent pressure.

  • Material: PTFE (Teflon)
  • Fits: Dura-Flo 1800 & Dura-Flo 2400 lowers
  • Function: Prevents fluid bypass and ensures reliable pump sealing

Retail Price: $89.25
You save: $1.56 (1.75%)
Our Price: $87.69
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Overview & Compatibility for Graco 102857 Packing O-Ring

Compatible Machines

  • Graco Dura-Flo 1800 (430 cc) pump lowers
  • Graco Dura-Flo 2400 (580 cc) pump lowers

What is it?

The Graco 102857 is a PTFE O-Ring used as a Packing O-Ring in select Graco pump lowers. It seals critical interfaces in the outlet/lower housing to prevent fluid bypass and maintain prime and pressure.

  • Material: PTFE (Teflon) for chemical resistance and long wear.
  • Role: Prevents leakage/bypass; stabilizes pump performance.
  • Placement: Lower/outlet housing area in the Dura-Flo lower assemblies.

Specifications

Part Number 102857 (a.k.a. 102-857)
Item Type Packing O-Ring / O-Ring seal
Material PTFE (Teflon)
Primary Fit Dura-Flo 1800 & Dura-Flo 2400 pump lowers
Function Seals the outlet/lower housing to prevent fluid bypass and pressure loss

Always depressurize and follow Graco’s pressure-relief procedure before servicing.

Fitment Guidance

  • Check your pump’s ID plate and parts manual for Dura-Flo 1800 or 2400 lower confirmation.
  • Inspect mating surfaces; replace worn packings and O-rings as a set when wear is evident.
  • Use compatible lubricant/assembly practices specified by Graco during installation.

Frequently Asked Questions

Yes—if the lower is a Dura-Flo 1800 or 2400 assembly, 102857 serves the same sealing function regardless of housing material. Verify via your exact lower’s parts list.

Persistent seepage at the lower, difficulty holding prime, or pressure drop under load can indicate a worn or damaged O-Ring. Inspect and replace as needed.

Typically no sealant is required on PTFE O-rings. Follow the service manual: clean grooves, lightly lubricate if specified, and avoid twisting the O-ring when seating.

Reuse isn’t recommended. PTFE can take a set; replacing with a new 102857 ensures correct sealing and reduces downtime risk.

Match the lower assembly model (Dura-Flo 1800 or 2400) in your parts manual. Cross-check the reference callout for the packing/o-ring location and confirm Part #102857.

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