Graco 24B829 Piston Valve Kit 250CC (1045)

The Graco 24B829 Piston Valve Kit 250CC (1045) is a genuine OEM repair kit designed for Graco 250 cc / 1045 pump lowers. It ensures smooth operation, proper priming, and long-lasting performance for heavy-duty sprayers.

Fits GH 733ES (16U279, 16U778 Big 250)
Compatible with Xtreme 250cc (1045) pump lowers – L250C1 and similar
Restores piston valve seal and flow consistency
OEM Graco quality for precise fit and durability

List Price: $302

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Description

Overview & Compatibility

Compatible Machines

Graco GH 733ES — models 16U279 and 16U778 (Big 250)
Graco Xtreme 250cc (1045) pump lowers — L250C1 and equivalent 250 cc/1045 configurations

Tip: Always verify with your sprayer’s parts list before ordering.

What is it?

The Graco 24B829 Piston Valve Kit 250CC (1045) is an OEM valve assembly for 250 cc / “1045” pump families. It restores proper check action in the lower pump so your sprayer maintains prime, delivers even flow, and minimizes pulsation on compatible Graco “Big Rig” and Xtreme-series 250 cc lowers.

Quick Specs

Part Number	24B829
Description	Kit, Valve, Piston — 250cc (1045)
Pump Family	Xtreme / 1045 “250 cc” lowers
Known Fits	GH 733ES (16U279, 16U778 “Big 250”); L250C1 lower and equivalent 250 cc/1045 configurations
Function	Replaces worn piston valve to restore prime/flow consistency and reduce downtime

Note: If your machine uses a different lower size (e.g., 190 cc/220 cc/290 cc), this kit will not fit.

Benefits & When to Replace

Smoother pressure control and consistent spray pattern
Improved priming and reduced surging / spitting at gun
OEM fit for faster service on 1045 / 250cc lowers
Replace when you see difficult priming, pressure drop, or backflow through the lower

Frequently Asked Questions

It fits 250cc (1045) lowers such as L250C1 and is listed for GH 733ES (16U279, 16U778 “Big 250”). Check your parts manual to confirm your lower size and part number before ordering.

Hard priming, loss of pressure under load, surging, or material leaking back through the lower often point to a worn piston valve and seat.

Yes — 24B829 is an OEM Graco piston valve kit for the 250 cc / 1045 pump family.

No. This kit is specifically for 250cc (1045) lowers. Using it on other sizes can cause improper sealing and damage.

Clean the lower thoroughly, inspect the seat, and torque components to spec. After reassembly, flush with compatible solvent and check for leaks before loading material.