Graco 243181 Piston Valve Repair Kit

Graco 243181 Piston Valve Repair Kit is an OEM replacement designed to restore proper sealing and pressure control in the sprayer’s fluid section. Ideal for maintaining smooth performance and reducing downtime.

Ensures consistent spray pressure and pattern
Fits multiple Graco ST, STX, and Ultra Max models
Durable OEM construction for long service life
Recommended during full pump or packing replacement

List Price: $113.5

You save: $11.8 (10.40%)

Sale Price: $101.7

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Description

Product Overview & Compatibility

Compatible Machines

The Graco 243181 Piston Valve Repair Kit is used across popular contractor-grade sprayers. Verify your exact model/series before ordering.

233686 – 295 ST
232790 – 395 Duron Pro
232922 – 395 ST Pro Hi-Boy
232920 – 395 ST Pro Stand
232932 – 455 ST Pro Hi-Boy Complete
232931 – 455 ST Pro Lo-Boy Complete
232930 – 455 ST Pro Stand Mount
232990 – 495 Duron Pro
232940 – 495 ST Pro (Hi-Boy & Lo-Boy)
234140 – DTX
824922 – Nova Hi-Boy
826032 – SPX
Ultra Max 695 (Fluid Section #243-183 / #243-189)

About the Part

Graco 243181 is the OEM Piston Valve Repair Kit for the fluid section. It restores proper valve sealing and timing so your sprayer maintains consistent pressure, smooth priming, and a uniform spray pattern.

Key Features & Benefits

OEM-grade fit for reliable sealing and long service life.
Restores performance: fixes pressure drop, surging, and hard-to-prime issues caused by a worn piston valve/seat.
Downtime reducer: refreshes the fluid section without replacing the entire pump.
Predictable maintenance: ideal during full pump services or when changing packings.

Quick Specs

Graco Part No.	243181 (a.k.a. 243-181)
Component Type	Piston Valve / Valve Seat (Repair Kit)
Section	Fluid Section (piston/valve assembly)
Common Pairing	Used with rods/packings during pump services (e.g., with 243178 bare rod on select units)

When to Replace

Loss of pressure, pulsing/surging under load.
Hard priming or frequent pressure fluctuations.
Leaking back into the intake during stroke reversal.
Visible valve/seat wear during pump tear-down.

Installation Notes

Depressurize and flush the sprayer; disconnect power.
Disassemble the fluid section as directed in your model’s manual.
Clean all mating surfaces; install the new valve/seat in the correct orientation.
Reassemble with torque per spec; prime with compatible fluid and test for leaks.

Frequently Asked Questions

It’s commonly used on Ultra Max 695 units that use Fluid Section #243-183 or #243-189. Check your sprayer’s parts list or serial-specific manual to confirm before purchase.

Surging, inconsistent pressure, difficult priming, and internal bypass leakage are common. Inspection during pump service will often reveal seat wear or damage.

Yes, if you are comfortable servicing the fluid section and have the manual. Follow safety procedures, use proper torque, and replace companion wear parts (packings/rod) as needed.

This listing is for the genuine OEM Graco 243181 Piston Valve Repair Kit unless otherwise stated. Aftermarket equivalents exist; check the product title/brand before adding to cart.

Keep filters clean, use recommended fluids, flush after use, and service packings on schedule. Avoid dry-running and store the unit with pump armor or rust inhibitor when appropriate.