Marshall Excelsior Co.

About Marshall Excelsior Co.

Marshall Excelsior Co. has built a decades-long reputation as one of North America's most trusted manufacturers of LP gas and propane handling equipment. Founded and headquartered in Marshall, Michigan, the company specializes in precision-engineered components designed to safely and efficiently manage the flow and pressure of liquefied petroleum gas across a wide range of applications — from recreational vehicles and marine vessels to agricultural equipment and industrial systems.

What sets Marshall Excelsior apart is its unwavering focus on safety, reliability, and regulatory compliance. Every product is engineered to meet or exceed industry standards set by organizations such as UL (Underwriters Laboratories) and CSA Group, giving end users and installers alike the confidence that comes from working with rigorously tested components. This commitment to quality has made Marshall Excelsior a go-to source for OEM manufacturers, dealers, and service technicians across North America.

Gas Pressure Regulation — A Core Competency

At the heart of Marshall Excelsior's catalog are its industry-leading gas cylinder pressure regulators. These regulators are engineered to deliver consistent, precise outlet pressure regardless of fluctuating inlet conditions — a critical performance requirement for safe propane and LP gas systems. Whether used on a portable cylinder, a large stationary tank, or an RV's onboard propane setup, Marshall Excelsior regulators are built for dependable, long-term service.

Hoses, Adapters & Connection Hardware

Beyond regulators, Marshall Excelsior offers a comprehensive selection of LP gas hoses designed to handle the demands of propane and natural gas applications safely. These hose assemblies are constructed with materials rated for LP service and are available in a range of lengths and end configurations to suit diverse installation needs.

Completing the system, Marshall Excelsior's adapters and fittings make it possible to connect equipment with different thread types or valve configurations — an essential consideration when retrofitting or upgrading existing propane systems. Their adapter lineup covers the most common POL, ACME, and inverted flare connections found throughout the industry.

Pressure Management for Broader Applications

Marshall Excelsior also extends its pressure management expertise into related product areas, including water inlets and pressure regulators suited for RV and marine plumbing systems. This breadth of coverage reflects the company's ability to apply precision engineering principles beyond LP gas alone.

Why Choose Marshall Excelsior?

• Safety-First Engineering: All products meet stringent UL and CSA certification standards.
• American Manufacturing Heritage: Decades of domestic manufacturing experience in Marshall, Michigan.
• Wide Application Range: Engineered solutions for RV, marine, agricultural, and industrial propane systems.
• OEM & Aftermarket Trust: Chosen by original equipment manufacturers and field technicians alike.
• Comprehensive Propane System Coverage: Regulators, hoses, adapters, and fittings — all from one trusted source.