Graco 256219 Potentiometer and Pressure Control Knob

The Graco 256219 Potentiometer and Pressure Control Knob ensures smooth and accurate pressure regulation on your airless sprayer. Ideal for maintaining consistent spray output and replacing worn or erratic control knobs.

Part Number: 256219
Function: Adjusts and stabilizes spray pressure
Compatible With: Ultra Max II 495 / 695 / 795 / 1095 / 1595
OEM Quality: Genuine Graco replacement part

Retail Price: $149

You save: $15.5 (10.40%)

Our Price: $133.5

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Description

Graco 256219 Potentiometer and Pressure Control Knob

Compatible Machines

The Graco 256219 Potentiometer & Pressure Control Knob is used on the following sprayers (check your exact model/series revision to confirm):

Ultra Max II 495
Ultra Max II 695
Ultra Max II 795
Ultra Max II 1095
Ultra Max II 1595
Selected Ultra / Ultimate MX variants (e.g., 695/795 series)

Product Summary

The Graco 256219 Potentiometer and Pressure Control Knob provides the user interface and feedback signal for regulating spray pressure on compatible Graco airless paint sprayers. Turning the pressure control knob adjusts the potentiometer, which communicates the setpoint to the control module, helping maintain consistent output pressure.

Key Features & Benefits

Direct pressure adjustment: Smooth rotary control for precise pressure setting.
Stable performance: Reliable signal to the control board for consistent spray pattern.
OEM component: Engineered to fit designated Ultra Max II and related models.
Service-friendly: Straightforward replacement when pressure control becomes erratic or unresponsive.

Technical Details

Item	Detail
Part Number	256219
Component	Potentiometer with Pressure Control Knob (rotary)
Function	User pressure input & feedback signal to sprayer control electronics
Series Fit	Ultra Max II 495 / 695 / 795 / 1095 / 1595; select Ultra & Ultimate MX variants
Cross-Reference	Supersedes/used in place of certain earlier potentiometer numbers (e.g., 236352) on specific models
Package	Assembly with knob (wiring/connectors as per model revision)
Origin	Genuine Graco OEM

Installation & Service Notes

Disconnect power before service; note knob position for reference.
Inspect connector and harness for corrosion or damage; seat firmly.
Some models may require calibration or a pressure test after installation.
If pressure drifts, verify transducer, control board, and mechanical restrictions are sound.

Frequently Asked Questions

Match your exact model and serial range in the Graco parts manual. For Ultra Max II 495/695/795/1095/1595, 256219 is commonly specified, but verify Standard/ProContractor/IronMan variant and revision year before ordering.

Often, yes—worn potentiometers cause unstable or dead spots. However also check the pressure transducer, control board, wiring, and for fluid restrictions. Diagnose holistically if symptoms persist after replacement.

It supersedes certain earlier numbers (like 236352) on specific models. Always confirm via your model’s official parts breakdown to ensure the supersession applies to your unit.

Most units do not require special calibration beyond a pressure test. Set to a mid-range, prime, and verify the machine holds a steady pressure. Follow your model’s service guide for any additional procedures.

Dead spots while turning the pressure control knob, sudden pressure jumps, inability to reach set pressure, or no response to knob movement typically indicate a worn potentiometer.