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Graco 104144 Compression Spring

The Graco 104144 Spring, Compression is an OEM internal spring for select Graco mechanical back pressure valve/regulator assemblies—used to hold steady return-line pressure. Verify your regulator’s exploded view for 104144 before ordering.

  • OEM fit for spring-type BPR/regulators
  • Stabilizes return-line pressure / reduces pulsation
  • Match by regulator assembly (not sprayer family)
  • Check manual: listed as Spring, Compression (104144)

$81.56
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Overview & Key Details

The Graco 104144 is an OEM Spring, Compression used inside select Graco mechanical back pressure valve (BPR) / regulator assemblies to provide the correct preload for stable return-line pressure control.

Compatible Machines

A machine-by-model list is not published for this part. It is installed inside specific Graco back pressure valve/regulator assemblies. Please verify using your sprayer’s parts manual or the BPR/regulator’s exploded view for part 104144.

  • Fits select mechanical (spring-type) back pressure valves used on Graco circulation/return systems.
  • Not universal—confirm your exact BPR/regulator assembly calls out 104144 before ordering.

Part Details

Field Information
Part Number 104144
Name Spring, Compression (Genuine Graco OEM)
Function Provides calibrated spring force inside a mechanical back pressure valve/regulator to maintain stable return-line pressure.
Used In Selected Graco BPR/regulator assemblies on circulation/return systems. Check your assembly’s parts list for 104144.
Compatibility Note Model-specific sprayer lists (e.g., Ultra Max II, Mark Series, GMAX) are not published for this spring. Verify by assembly number.

Why Choose OEM

  • Correct preload for the valve—helps stabilize pressure and reduce pulsation.
  • OEM fit—no guesswork on rate/length compared to generic springs.
  • Supports consistent finish quality on recirculating/return applications.

Quick Identification Tips

  • Locate the return-line back pressure valve/regulator on your rig; open the manual’s exploded view.
  • If the parts list names Spring, Compression – 104144, this is the correct replacement.
  • If your system uses a pneumatic or diaphragm-type regulator (no internal coil spring), 104144 will not apply.

Frequently Asked Questions

Check the parts manual for your sprayer’s back pressure valve/regulator. If the exploded diagram lists Spring, Compression (104144), it’s compatible. If your regulator is a different type (e.g., pneumatic), this spring will not be used.

Unstable return pressure, excessive pulsation, or inability to hold set pressure in the BPR can indicate a fatigued or damaged spring. Inspect the regulator and replace worn internals as a set if needed.

Those product families may use different regulator assemblies across years/variants. The correct method is to verify the regulator/BPR assembly bill of materials. If that assembly calls out 104144, then it will fit.

Depressurize the system fully, follow the regulator’s service procedure, and install the Spring, Compression in the correct orientation. Inspect seats, seals, and guides; replace any worn components at the same time for best results.

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