The Fueling Systems People
Dockendorf is a trusted leader in fuel handling system installations. Our mission is to deliver top-quality installations with maximum efficiency. We focus on delivering efficient designs that ensure a strong return on investment.
YEARS OF EXPERIENCE
CONSTRUCTION PROJECTS
CLIENTS
Fuel Line and Gas Installation Specialists
Our services
Compliance Inspections
Ensure the State and Local compliance of your petroleum equipment and fueling operations with Dockendorf. Prevent environmental leaks that could contaminate water systems and soil. Trust the compliance inspections by certified petroleum equipment technicians.
Compliance services include:
• Monthly and annual inspections
• 3-year EPA testing
• Sump and overfill testing
• STI certified cathodic protection testing
• Inspections of petroleum equipment below ground, underneath manholes and beneath the dispensers
• Pressure testing on piping
• A variety of preventative maintenance programs available
• Calibrations for retail, commercial facilities and truck meters

Sales: Petroleum equipment and products
Dockendorf is your go-to source for premium, cutting-edge petroleum equipment and products. As an authorized distributor of leading industry brands, we bring you expert sales support backed by a knowledgeable and dedicated team, ensuring your fueling operations are efficient and hassle-free.
From retail and commercial fuel dispensers to service station equipment, piping, fuel management systems, tank monitoring, pump/fluid transfer solutions, POS terminals, EV chargers, lighting, canopies, emergency generator fuel systems, and more – we've got everything you need to keep things running smoothly!
PARTS
At Dockendorf, our Parts Department stands out for its deep expertise and dedication to keeping your operations running smoothly. With years of experience in the petroleum industry, our knowledgeable team is ready to help you find the right parts, whether you’re looking for replacement components or upgrades for your equipment. We stock a wide range of high-quality parts from top manufacturers, ensuring quick availability and reliable performance. Our team is committed to providing you with fast, accurate solutions tailored to your specific needs, helping you minimize downtime and maximize efficiency.
For dependable service and expert advice, trust the experienced Parts Department at Dockendorf.

Construction Services
Dockendorf is a trusted leader in fuel handling system installations. Our mission is to deliver top-quality installations with maximum efficiency. Through our systematic construction approach and cutting-edge technology, we optimize land usage and design layouts that meet your needs today while planning for future growth. We focus on delivering efficient designs that ensure a strong return on investment.
Our Services Include:
• Above Ground Storage Tanks
• Compressed Natural Gas (CNG) Systems
• Diesel Exhaust Fuel (DEF) Solutions
• Ethanol Conversion Services
• Fleet Fueling Systems
• Fuel Dispensers
• Generator Tank Fueling Systems
• Manhole & Spill Bucket Replacement
• Concrete Removal and Replacement
• Point of Sale (POS) Systems
• Tank Monitoring Solutions
• Tank Top Upgrades
• Underground Storage Tanks
Dockendorf is here to support your project from start to finish!

Service Excellence at Dockendorf - Available 24/7
At Dockendorf, we are committed to setting the standard in petroleum equipment safety and service quality. Our top priority is ensuring that your operations run smoothly, efficiently, and safely. We achieve this through strict adherence to safety protocols and delivering superior repair and maintenance services for petroleum equipment. Our dedication to excellence is reinforced by our significant investment in technician certifications—both factory and regulatory. This ensures that our team is equipped with the latest knowledge and skills to provide exceptional service and maintenance for a wide range of petroleum equipment.
Our certified technicians are trained by leading manufacturers such as Wayne Fueling Systems, Franklin Fueling Systems, FuelMaster, PetroVend, Gasboy, OPW, and VeriFone.
This expertise allows us to handle specialized maintenance and repair across a broad spectrum of equipment, ensuring optimal performance and compliance with safety standards.
Beyond maintenance and repairs, Dockendorf offers comprehensive programming, start up, and training for new petroleum equipment installations. We serve various industries, including retail gas stations, truck stops, airports, and industrial/commercial sites, ensuring your equipment is expertly managed from installation through ongoing maintenance.
When you choose Dockendorf for your petroleum equipment needs, you're partnering with a company that prioritizes safety, reliability, and performance. With a team of highly trained professionals, we guarantee your equipment is in the best hands, ensuring your operations remain safe, efficient, and worry-free.



why choose dockendorf
Quality Service
Our goal is to take care of you. We strive to fix and maintain your equipment - the right way.
Locally Owned
Because we are Locally owned and operated, we can be more personable and accessible to our customers - which large corporations simply cannot provide Competitive Pricing.
We will not take advantage of our customers and our pricing is designed to be as affordable as possible to get your store running properly with less stress.
Honesty & Integrity
We will always be straight with our customers and if we cannot provide a solution to you, we will lead you in the right direction.
Latest Projects
Explore our latest construction projects.

Sioux City Airport

Jet Travel Plaza

Parkston Cenex Ag Land
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Proudly serving all of South Dakota, Southwestern Minnesota, Northwest Iowa & Northeast Nebraska