You Deserve Experts.We Have Them.

We fabricate custom piping systems and components for the marine industry. Our knowledge and expertise ensure that the components we build for you will meet your requirements and provide you with the best solution for your application. As a US Coast Guard and American Bureau of Shipping-approved fabricator, we offer a complete range of services from design/assist to fabrication to assembly. We can also provide installation within the state of Wisconsin. Whatever your marine pipe fabrication needs, our team can complete your project on time and to your specifications. Learn more about our services in this industry and contact us with questions or requests.

Industrial Piping for Marine Piping Systems

Ahern is equipped to handle fabrication for various types of structures and marine piping, drawing on our expertise in multi-trade modular prefabrication. We have a manufacturing capacity of 418,000 sq. ft. with over 36 acres of laydown yard across our Fond du Lac and Appleton facilities.

We specialize in the fabrication of:

  • Prefabrication of pipe spools
  • Low and high-pressure piping
  • Process piping
  • Stainless steel pipe fabrication, carbon steel pipe fabrication, chrome alloy, and specialty alloys
  • Black water systems
  • Greywater systems
  • Marine hydraulic systems
  • Boat heating systems
  • Ballast water systems
  • Ventilation systems
  • and other marine industrial piping needs

Trust Ahern for your marine piping fabrication needs. Our experienced project teams will ensure your project is completed to the highest standards of quality and tailored to meet your project requirements.

Multi-TradeServices in Your Industry

At Ahern, we provide facilities in Wisconsin with all our multi-trade services. However, we also offer Fire Protection & Pipe Fabrication Services outside of Wisconsin.

Multi-Trade Services

Ahern has 16 office locations throughout the Midwest. We offer fire protection expertise in all geographies, as well as new installations throughout the U.S.; mechanical installations and service within Wisconsin; and pipe fabrication work in the U.S. and beyond. 

Pipe Fabrication

At Ahern, your pipe fabrication project is our specialty. We fabricate and ship according to project-specific priorities, and we assist in all aspects of system layout, including budget planning and takeoff preparations. Ahern offers pipe fabrication services and also provides welded piping for a variety of systems. 

Ahern Plumbing Cumberland


Whether for the immediate distribution of clean water or the safe transportation of unwanted waste, quality plumbing is a key component of any building.

An Ahern service employee smiling on a job site

Preventive Maintenance

Ahern offers mechanical preventive maintenance agreements (PMAs) and fire protection system and equipment inspection services. Mechanical PMA programs can help ensure your systems are operating efficiently and can help to reduce costly emergency repairs or replacements. Fire protection system...

Ahern technician servicing a boiler


Ahern has been designing, installing, and servicing HVAC systems since the company's inception over a century ago. Our team of professional engineers, licensed designers, experienced project managers, and skilled foremen can bring your next HVAC project from idea to reality.

An Ahern employee working on a control panel

Building Controls

Building controls – also called Building Automation Systems (BAS), Building Automation and Control Systems (BACS), or Building Control System (BCS) – have quickly become vital in maximizing efficiency, sustainability, and profitability in today’s buildings.

Building Commissioning

Ahern has the expertise needed to ensure your systems are functioning as intended to meet your facility goals.

Building Energy Solutions

Ahern employs over 110 NICET-Certified professionals, 13 licensed PEs, 3 LEED APs, and 4 EITs. Our energy solutions team will help you better manage your utility spending by identifying and recommending energy-saving alternatives.

An image of Ahern's fabrication shop

Multi-Trade Prefabrication

Installation of mechanical, electrical, and plumbing systems can require meticulous attention to detail and precise coordination with multiple trades.

A tank in Ahern's Industrial Services Shop

Industrial Services

We offer a full range of solutions for industrial and manufacturing process environments including installation, repair and replacement, machine automation, and fabrication.

An Ahern designer working on a computer

Preconstruction Services

As a preconstruction adviser, Ahern’s knowledge and experience benefit general contractors, architects, and building owners through early involvement in system selection that meets the end user's goals and budget.

An Ahern fire protection employee working on a job site

Fire Protection & Life Safety

Last year, we provided life safety inspections to over 28,700 facilities. This includes fire extinguishers, kitchen systems, dry chemical systems, emergency lighting, fire alarm testing, and fire/smoke damper testing.