Graco 287837 Pump Piston Valve

Graco 287837 Pump Piston Valve is a genuine OEM part designed for reliable flow control and sealing in high-pressure pumps like the GH 833.

Part Number: 287837
Fits: Graco GH 833
Type: OEM Pump Piston Valve
Function: Maintains one-way material flow and pressure consistency
Replaces: Worn or leaking piston valve assemblies

List Price: $250

You save: $34.75 (13.90%)

Sale Price: $215.25

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Description

Overview & Key Details

Compatible Machines

Graco GH 833 (Gas Hydraulic)

Product

Graco 287837 Pump Piston Valve — also referenced as a Valve, Piston or Piston Valve Repair Kit. This OEM component sits on the pump piston and controls one-way material flow during the pressure/return stroke, ensuring proper sealing and consistent output.

Quick Specs

Part Number	287837
Item Name	Pump Piston Valve (OEM)
Primary Fit	GH 833 pump assembly
Function	Controls and seals flow on the piston end to maintain pressure, reduce pulsation, and restore spray consistency.
When to Replace	Symptoms include pressure loss, unstable fan pattern, hard priming, or leakage past the piston valve.
Notes	Install only on matching pump assemblies; consult your unit’s parts breakdown for confirmation.

Why Choose OEM

Correct fit for GH 833 pump geometry and seat/ball interfaces.
Restores sealing performance and extends pump service life.
Maintains original pressure capability and finish quality.

Installation & Care Tips

Depressurize and flush according to the sprayer manual before service.
Inspect mating components (seat/ball/rod) and replace any worn parts at the same time.
Use clean lubricant compatible with the pump during assembly; torque to spec.
After reassembly, prime with appropriate fluid and check for leaks and pressure stability.

Frequently Asked Questions

Listings commonly cite GH 833. Some vendors mention “and others,” but compatibility can vary by pump build. Verify against your unit’s parts manual or contact support with your model and serial for confirmation.

Noticeable pressure drop, irregular fan pattern, difficulty priming, or material leaking past the piston area are common indicators the Pump Piston Valve is worn or not sealing properly.

Yes—287837 is an OEM Graco component, designed for the specified pump assembly tolerances and materials.

Follow the service manual: depressurize, flush, keep all parts clean, replace companion wear items together, lubricate appropriately, and torque to specification. After installation, pressure-test for leaks and performance.

Returns depend on your store policy and condition of the part/packaging. To avoid delays, confirm fit with your model and serial number before ordering.