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Graco 15F804 Regulator Needle

The Graco 15F804 Regulator Needle is an OEM‑grade replacement needle for Graco fluid regulators — it ensures accurate flow/pressure control and stable operation.

  • Part No: 15F804
  • Function: Internal regulator needle for fluid/pressure control
  • OEM Grade: Genuine Graco part for proper fit and reliability
  • Use Case: Replacement in regulator assemblies of spray, pump or coating systems
  • Benefit: Ensures stable flow/pressure and prevents leaks or regulation issues

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Product Overview

The Graco 15F804 Regulator Needle is a genuine OEM replacement needle for Graco fluid regulators. It controls the flow or pressure inside the regulator assembly, ensuring accurate regulation and stable performance in spray systems, pumps or coating equipment. Using an authentic regulator needle helps maintain precise fluid control and avoids leaks or malfunctions caused by worn or damaged parts.

Key Features

  • OEM‑grade part: Original Graco regulator needle specified for proper fit and reliable operation.
  • Precise flow control: Regulates fluid pressure or flow within the regulator for consistent spray or pump performance.
  • Durable construction: Lightweight but sturdy design ensures long service life even under frequent use.
  • Easy replacement: Simple to swap in when the existing needle shows wear or degradation — no major overhaul needed.
  • Maintain system integrity: Proper sealing and regulation help prevent leaks, pressure instability, or damage to connected components.

Specifications

Specification Details
Part Number 15F804
Type Regulator Needle
Intended Use Internal needle for fluid regulator assemblies in spray/pump systems
Condition New, OEM‑grade replacement
Weight (approx.) ~ 0.005 lbs (per vendor listing) 

Maintenance & Installation

  • Depressurize and drain the system before removing or installing the regulator needle to avoid leaks or fluid injury.
  • Inspect the regulator seat/housing for wear or damage before installing the new needle — a damaged seat can cause leaks even with a new needle.
  • Ensure proper alignment and seating when inserting the new needle; misalignment may cause improper sealing or pressure regulation failures.
  • After installation, bleed the system and test under working pressure to confirm correct regulator performance and leak-free sealing.
  • Check periodically during maintenance intervals for wear — especially if the system handles abrasive fluids or experiences frequent cycles — and replace the needle as needed for consistent performance.

Frequently Asked Questions

The needle controls the fluid flow or pressure inside the regulator, acting as the internal metering/valve element to ensure stable, controlled output. 

Yes — 15F804 is listed as an original Graco regulator needle, preserving OEM quality, proper tolerances, and fitment.

Replace the needle if you observe inconsistent pressure regulation, leaks at the regulator, or visible wear/damage on the needle or seat — such signs indicate the seal or regulation may fail.

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