Mason West


Mason Industries

Mason Industries has been a leader in the field of noise, vibration and seismic control for over 60 years. Their products are specified by consultants and architects in the U.S. and throughout the world. In addition to a complete range of mountings, hangers, and flexible connectors for mechanical equipment, they provide computer studies for snubbing systems in earthquake and bomb blast zones. Floating floors, walls, and suspended ceilings provide total acoustical room isolation. Rubber bearing pads and spring mountings are used to support entire buildings and railroads.

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Mercer Rubber Co.

The Mercer Rubber Company was started in 1865 and specialized in molded rubber mechanical products, rubber sheeting and conveyor belting. We began building rubber expansion joints in the early 1930’s.

Mason Industries, one of the world’s largest producers of molded rubber expansion joints, acquired the company in 1982. Mercer is managed by professional engineers and our engineering staff is larger than any other similar company.
Hand built flexible expansion joints for piping and duct work solve problems that cannot be handled by other materials. Rubber is more compliant and resilient than metal, fiberglass or plastic.

The technology behind building shapes for industrial applications has grown. The United States chemical and industrial complex is in the forefront of synthetic rubber for chemical resistance and temperature extremes. Modern reinforcement fabrics and tire cord have completely replaced early designs using cotton and rayon. The end result is a lighter, more flexible, higher pressure and temperature resistant product.

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Metal-Fab Inc.

The Metal-Fab commercial division offers the most complete line of chimneys, vents, special vent for condensing appliances, fume exhausts, engine exhausts, and factory-built kitchen ventilation systems available. Our innovative product offerings are designed to meet the changing needs of the industry. Selecting the right product for your application, constructed from the proper materials, is simple and easy with Metal- Fab. The rigid quality standards of our systems assure durable and reliable performance.

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Nexus Valve was established in 1994 with the intent of providing the HVAC industry with the highest quality hydronic system components at reasonable costs. The company founders and senior staff have over 75 years worth of experience in sales, design and distribution of HVAC and mechanical contracting products, and were among the earliest proponents of specialized hydronic components and packaging. Nexus Valve was founded to provide single sourcing of quality hydronic components, to provide value-added services for resellers and users of hydronic products, and to allow others in the industry to benefit from such a program. The combined experience of the Nexus Valve staff ensures a complete understanding of the marketplace from manufacturer to end user.

Nexus Valve continues to look to the future by improving the quality of products and services with a deliberate program of expanded product lines, services, and distribution outlets. We look forward to serving the entire industry for many years to come.

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Rovanco Piping Systems is a Manufacturer of pre-fabricated, pre-insulated pipe & piping systems. (Offered from our San Francisco and Sacramento offices.)

Rovanco Piping Systems, Inc., is a privately held manufacturing company located in Joliet, Illinois which was founded by owners Larry and Dick Stonitsch in 1969. The business was conceived for the express purpose of providing a high quality pre-insulated piping system as an alternative to (outdated, costly, less effective, etc.) field insulated piping.

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Download the new OSHPD approved Mason West Seismic Manual