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Graco 15U597 Piston, 4.5 Cm

Replacement piston for Graco airless pumps — engineered for smooth reciprocating action and long pump life.

  • Brand: Graco
  • Type: Piston
  • Application: Pump fluid displacement
  • Fit/Ports: 4.5 cm pump bore
  • Material: Hardened metal

$257.5
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Compatible Machines / Systems

  • Graco airless sprayer pumps with 4.5 cm piston bore
  • Professional airless fluid handling series
  • High‑pressure piston pumps requiring OEM pistons
Manufacturer Graco
Model Number 15U597
Type Piston
Center Section Material Hardened steel
Port Size 4.5 cm bore
Air Inlet N/A
Wetted Material Metal
Compatible Media Paints, coatings, solvents compatible with Graco piston pumps

Frequently Asked Questions

What does the piston 15U597 do?

It reciprocates inside the pump chamber to displace fluid and generate pressure for spraying.

Does this fit all Graco pumps?

It fits Graco pumps designed for a 4.5 cm piston — always verify pump part breakdown.

How often should it be replaced?

Replace when wear or scoring is visible to maintain performance and prevent leaks.

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