Graco 15G654 Muffler Manifold Inner Quiet

Muffler Manifold Inner – Model 15G654

The 15G654 MUFFLER, MANIFOLD, INNER, QUIET is a high-performance, precision-engineered inner manifold assembly designed to deliver quieter operation and enhanced durability for industrial fluid-handling systems. Built to exact tolerances, this inner muffler manifold integrates seamlessly into the fluid circuit to ensure stable flow, minimized noise and consistent performance under demanding conditions.

Key Specifications

Product Highlights

• Specifically engineered for quiet operation in high-flow systems, reducing audible noise from bypass or exhaust passages.
• Precision-machined fluid channels maintain efficient flow characteristics while supporting high pressure and repeated cycling.
• Durable material and finish provide resistance to corrosion, overspray and industrial job-site conditions.
• Direct OEM replacement part designed to restore original system performance, reliability and sound levels.

Installation & Service Notes

Before installing the 15G654 manifold, ensure the system is fully depressurized and disconnected. Remove the existing inner manifold if present, clean all mounting faces and check port threads and seals for damage. Align the new manifold correctly, secure using the proper torque values and verify all gasket and sealing surfaces are properly seated. After installation, slowly bring the system back online and inspect for leaks, abnormal noise or vibration.

Maintenance & Care

• Inspect the manifold regularly for signs of wear, cracking or gasket failure—especially in high-cycling or high-temperature systems.
• Confirm muffler chamber ports are clear and not blocked by overspray residue, salt or debris that might raise internal pressure.
• Check all mounting bolts and hardware during routine maintenance to ensure secure attachment and proper alignment.

Frequently Asked Questions