Graco 24U993 Piston Valve

The Graco 24U993 Piston Valve ensures precise sealing and flow control within your airless sprayer’s pump assembly. Ideal for maintaining consistent pressure and preventing leaks.

Replaces older valve part 240150
Fits UltraMax II 1095/1595 & GMax II 5900
Used in TexSpray Mark V/VII models
OEM Graco component for reliable performance

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Description

Graco 24U993 Piston Valve — Compatibility, Specs & FAQs

Compatible Machines

This genuine Graco 24U993 Piston Valve (piston valve/seat) is used in the following sprayer families and pump builds. Always verify your unit’s series and pump number before ordering.

UltraMax II 1095
UltraMax II 1595
GMax II 5900 (and related GMax 5900/10000 variants)
TexSpray Mark V
TexSpray Mark VII

What is the 24U993?

The 24U993 Piston Valve is an internal fluid-section component that threads into the piston rod to control material flow and sealing under high pressure. A worn piston valve can cause pressure loss, poor spray pattern, and leakage. Replacing it restores proper pump performance.

Key Details

Part Number	24U993
Also Known As	Piston Valve / Piston Valve Seat / Repair Valve
Supersedes	240150 (previous valve part number)
Used In	Selected UltraMax II 1095/1595, GMax II 5900, TexSpray Mark V/VII pumps (verify pump build/series)
Function	Seals & directs fluid within the pump piston assembly to build/maintain spray pressure
Install Note	Valve threads into piston rod; Graco manuals note a factory thread-locking/sealing patch—do not remove it

Frequently Asked Questions

Yes. Listings indicate 240150 was superseded by 24U993. Always confirm against your sprayer’s parts list or pump build before ordering.

Common families include UltraMax II 1095/1595, GMax II 5900, and TexSpray Mark V/VII. Certain pump builds across these series use this valve—match your pump/build number to be sure.

Manuals show the piston valve unscrews from the piston rod. The piston typically includes a factory thread-locking/sealing patch. Do not remove the patch; it is designed for a limited number of service cycles before thread sealant is required. Always clean/inspect parts during service.

Check the model, series, and the pump/build number on your unit’s parts manual or data plate, then cross-reference the parts list for your exact pump assembly.