Bedford 58-3178 Piston Valve is Graco 287877 aftermarket replacement

Graco 287877 Piston Valve for GMax 3900, UltraMax 795 & 1095 – AfterMarket by Bedford Precision Parts

Bedford 11-4877 is the aftermarket replacement for the Graco 287877 piston valve. Manufactured by Bedford Precision Parts Corp, this valve is designed to restore performance in Graco GMax 3900, UltraMax 795, and UltraMax 1095 sprayers. Offering the same quality as OEM graco paint sprayer parts, it is a cost-effective solution that ensures professional contractors maintain efficiency and reliability in demanding spraying applications.

Where It Fits

This aftermarket piston valve is compatible with Graco GMax 3900, UltraMax 795, and UltraMax 1095 sprayers. These heavy-duty sprayers are commonly used on residential, commercial, and industrial projects. The piston valve is a key pump component that ensures smooth coating transfer to paint sprayer guns for consistent and precise applications.

What It Does

The piston valve regulates fluid movement within the pump chamber, maintaining system pressure and preventing fluid backflow. When worn or damaged, it can cause leaks, pressure instability, and irregular spray patterns. Replacing it with the Bedford 11-4877 restores smooth pump operation and protects critical parts like the pressure relief valve from strain due to fluctuating pressure.

Performance Benefits

• Aftermarket replacement for OEM Graco 287877 piston valve
• Compatible with Graco GMax 3900, UltraMax 795, and 1095 sprayers
• Restores reliable pump performance and spray consistency
• Durable Bedford design built for long-lasting service

Applications

This Bedford aftermarket piston valve is ideal for contractors applying latex, acrylics, primers, enamels, elastomerics, and protective finishes. It is built to perform in tough environments, ensuring professional-grade spraying results for residential, commercial, and industrial coatings.

Cross-Compatibility

Bedford 11-4877 is the aftermarket equivalent of Graco 287877. Always check your sprayer’s manual or parts reference guide to confirm compatibility before installation.

Get the Bedford 11-4877 piston valve today from eRepairCenter. Alongside this part, we stock a wide range of professional sprayer components, including speeflo parts, wagner paint sprayer parts, binks sprayer repair parts, and graco airless sprayer parts—everything you need to keep your spraying equipment operating at peak performance.