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An example of our industrial ductwork from Machinery at work at Interstate Mechanical And Millwright Inc.
An inside look into our headquarters in Spartanburg, SC.
Closeup of detailed welding from Machinery at work at Interstate Mechanical And Millwright Inc.
Loading a building onto a trailer in our factory warehouse in Spartanburg.
Closeup image of the craftmanship from Machinery at work at Interstate Mechanical And Millwright Inc.
Machinery at work at Interstate Mechanical And Millwright Inc.


At IMMI, we know building can be very stressful. So let us handle it! Whether you're remodeling, wanting a commercial uplift, or putting up a metal building, you name it and we will do it. Our licensed general contracting team will oversee every aspect of the job, from planning and design to construction and completion.  We assemble the best subcontractors and vendors for each project and manage them to ensure that the work is done on time and to the highest standards. 

Click Here to Learn More About Our General Contracting Services


Pre-engineered buildings are the perfect choice for those who need a reliable, fast, and cost-effective building solution. We are proud to offer this method of construction to our clients, as it allows for endless possibilities in terms of design and application. If you're looking for a warehouse, strip shopping center, church, gym, have come to the right place! Let us help you build a building that meets your needs and exceeds your expectations.

Click Here to Learn More About Our Pre-Engineered Buildings


Waterjet technology is a cold cutting process which cuts by using supersonic water, or water and abrasive, to erode material. Because of this, waterjets are unlimited in what they can cut. At IMMI, we pride ourselves in our quality, so having a high quality machine helps! Our Flow Waterjet provides the most precise cuts on any material of any thickness or shape.

Click Here to Learn More About Our Waterjet Cutting Services


•   Stainless Steel   •   Aluminum   •   Carbon   •   Copper


Craftsmanship is priority one, which is why our fabricators take pride in every job from the simplest to most meticulous custom builds. We seek the best and most cost-effective way to build your fabrication. 


 “Every fabrication leaves here with our reputation riding on it.” 

Click Here to Explore Our Custom Metal Fabrication Services




IMMI pipe welders are certified by an outside source and held to the highest of standards.

Whether its compressed air, steam or a simple drain, we can meet the customer's needs. We possess experience in all common materials, steel, stainless steel, copper and PVC as well as purged sanitary tubing.


“IMMI consistently strives to stay at the top of its field in the area of process piping.”


Click Here to Learn More About Our Process Piping Services



“Parts Wear, Parts Break.”  Just because a part is worn or broken does not mean it is ready for the trash. Our knowledgeable fabricators can repair worn or broken parts.


IMMI employees are experienced in utilizing materials such as:

aluminum, cast metals, lexan and much much more.


"We can extend the life of worn/broken parts."

Click Here to Learn More About Our Parts Repair Services




IMMI understands the importance of adhering to a stringent customer schedule and recognition that shutdowns are an essential part to keeping your facility running efficiently.  Our experience in serving production based companies gives us the fundamental understanding that ” time is money” and the longer a customer is down from production the less money they make.


"The customers need and schedule are of utmost priority."




Preventive maintenance practices can extend the life of your equipment and keeps equipment running as designed while reducing inefficiencies in operation along with energy usage.

IMMI possesses a knowledgeable staff with extensive experience with many types of machinery, along with a familiarity of the components and practices related to today’s industry. 


"Just because it isn't broke doesn't mean we can't fix it."


We provide short to long-term labor which is especially beneficial to facilities with limited maintenance personnel. This service reduces the strain on companies in need of highly qualified and experienced welders, fabricators or mechanics at a cost-effective rate without the liability of employing such an individual and all that it encompasses.


“Skilled labor without the financial burdens of hiring a full-time employee.”




To prevent contamination due to back pressure, many health regulatory regimes require an air gap or mechanical backflow prevention assembly between the delivery point of mains water and local storage or use. Where submerged mains inflow is permitted, a backflow prevention assembly is required, which protects the potable water system from contamination hazards.


In many countries. approved backflow prevention assemblies are required by law and must be installed in accordance with plumbing or building codes A typical backflow assembly has test cocks and shut-off valves and must be tested when installed if relocated or repaired, and also on a periodic basis.

In the US, the Environmental Protection Agency (EPA) holds local water suppliers responsible for maintaining a certain amount of purity in potable water systems. Many states and/or local municipalities require annual testing of backflow prevention assemblies. In most cases, the law requires a double check (DC), Reduced Pressure Principle Device, or an air gap when backflow prevention is mandated.


"IMMI is state certified to test, repair and replace backflow preventers."





Interstate Mechanical & Millwright, Inc. installs and relocates machines from the ground up with great precision and care. It requires skills and patience and the right tools for the job in order to accomplish moving expensive machinery with success.





In addition, we are capable of the following:


Sawing and removal of concrete


Forming and pouring new concrete


Assembling machinery to customer’s specification


Chiller piping for a client by Machinery at work at Interstate Mechanical And Millwright Inc.
Metal stairs custom built for a client in Spartanburg, South Carolina.
A detailed view of welding perfection by Machinery at work at Interstate Mechanical And Millwright Inc.
Custom pipework fabricated in house by Machinery at work at Interstate Mechanical And Millwright Inc.
Laying out a new project at our Spartanburg headquarters.
High quality process piping.
Delivering prodcuts to customers from our headquarters in Spartanburg, SC..
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