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Founded in Chicago in 1969 by a small group of pump engineers, Hydro, Inc. repairs, rebuilds and engineers upgrades for industrial pumps and other rotating equipment. Now the world’s largest independent pump rebuilder, Hydro works across manufacturers rather than representing a single brand, pairing its global service-center network with engineering, parts and reliability support. Its Chicago test lab was the first certified under the Hydraulic Institute’s Pump Test Lab Approval program, giving the company a distinctive way to verify repaired and re-engineered pumps before they return to service.
Hydroacoustics Inc. began in 1972 as a spin-off of acoustics research at Harvard University and General Dynamics, and has spent five decades developing specialized sound technology. Based in Henrietta, the company serves naval and scientific users with low-frequency underwater acoustic systems, while also adapting its patented expertise for oil recovery in mature fields. HAI has been awarded more than 50 U.S. and foreign patents.
For more than 40 years, HydroAir has engineered hydraulic, pneumatic, and electronic automation solutions for industrial and mobile equipment users along the northeast Atlantic coast. As an Applied Fluid Power company, it combines regional service through locations in the Northeast with engineering support for custom fluid-power systems, including specialized hydrostatic drive and electrification work.
HydroCosm develops distributed hydrogen-generation solutions that use existing water operations and pressurized water infrastructure to produce clean energy close to where it is needed. Founded by Frank Zammataro, the company focuses on recovering wasted energy from water systems with small hydroelectric generators and using it to power electrolyzers for hydrogen production. Its work also extends to hydrogen mobility solutions for public and private fleets and collaboration with governments on infrastructure standards.
Founded in 2009 by Edward and Terry Becker, Hydroflex Group GmbH develops and manufactures specialized cleaning solutions for GMP cleanrooms, with its headquarters in Buseck, Germany. The company is particularly known for its PurMop BLACK® carbon-fiber systems, including contact-free mop handling, and serves customers in more than 70 countries. Since 2025, Hydroflex has been part of the Dastex Group, while its quality management has held ISO 9001 certification since 2013.
Founded in Akron in 2007, Hydrogen Energy Systems, LLC develops hydrogen-fuel technology for internal-combustion engines, centered on its patented Hydrogen Mixing Block™. The device replaces a carburetor or electronic fuel injector so small engines can run mechanically on 100% compressed hydrogen, and the company has tested the system across engines from 6 to 13 horsepower. HES has also demonstrated the technology in a portable generator and a six-passenger golf shuttle prototype.
Led by New York City stylist Jeorge Napoleon, who has spent 35 years working with fashion houses and high-profile clients, HydroHair makes scalp-first hair-care products and professional rejuvenation treatments. Its botanical formulas center on hydration for natural curls and every hair texture, while the TriBeCa Scalp & Hair Rejuvenation Center brings that philosophy into customized in-person care.
Hydrojet is a Reading, Pennsylvania manufacturer known for bringing advanced composite work under one roof for aerospace, defense, and commercial customers. Its in-house operation supports projects from concept through finished parts, with particular strength in composite fabrication and precision machining. The company is AS9100D certified, ITAR registered, and a HUBZone-certified small business.
Formed in June 2017 through the combination of Hydromat Inc., Motch & Eichele, and Ultra Tech Machinery, Hydromat-RE was created to carry forward support for legacy Hydromat equipment. The company serves manufacturers and job shops by rebuilding and retooling rotary transfer machines, with direct access to Hydromat OEM parts and technical support.
HydroMax Inc. designs and manufactures commercial and industrial water purification systems, with a particular focus on ultra-pure water and process-water treatment. Based in Emmitsburg, Maryland, the company custom-engineers and factory-tests packaged systems for demanding water-quality requirements, and supports unusual applications with process design and pilot testing before full-scale construction. Its systems can treat or recycle process and wastewater, including zero-discharge applications where liquid discharge is not permitted.
Founded in 1971, Hydromotion manufactures fluid and electric transition components that carry fluids, power, and signals through movable joints. Based in Spring City, the engineering-intensive company develops both standard and custom swivels and assemblies, with its POWER PLATE technology providing continuous 360-degree contact for rotating power and data transmission. Hydromotion is a fully owned subsidiary of Texas Hydraulics and operates an ISO 9001-certified quality system with 100% testing before shipment.
Founded in 1967 as a small engineering company, Hydrotech supplies and builds industrial fluid-power and automation systems, then keeps them running through repair, diagnostics, and field service. Its Cincinnati-based operation combines custom manufacturing with a nationwide hose service reaching more than 20 locations, including mobile repairs for hydraulic systems up to 6,000 psi. Hydrotech is ISO 9001:2015 certified and also provides hands-on hydraulic training for industry professionals.
Founded in 1973, HydroThrift Corporation is a Massillon, Ohio manufacturer known for custom-engineered thermal transfer systems built for demanding industrial environments. Its packaged closed-loop systems are designed for industrial equipment cooling, while its heat exchanger repair work supports industry and utilities seeking to extend equipment service life. HydroThrift reports more than 23,000 completed projects and installations around the world.
HydroWorx grew from Dr. Paul Hetrick’s 1987 prototype, built after he recognized how an underwater treadmill could transform rehabilitation. Founded in 1997, the Middletown-area company now designs, manufactures, installs, and services aquatic therapy systems for facilities seeking safer recovery and movement. Its own technicians provide continuing support, while the company’s technology is used daily by more than 30,000 people worldwide.
Founded in 2013 as HYSUCAT USA, Rock Tavern-based HYFOIL Marine builds hydrofoil-assisted catamarans for recreational, commercial, and municipal use. Its New York team works from the foil-supported catamaran technology of naval architect Professor Gunter Hoppe, producing modular boats that can run on combustion or electric power and are designed to reduce drag while smoothing the ride. Vessels are built in the USA by ABYC-certified technicians to USCG compliance and NMMA certification standards.
HYGE, Inc. carries forward a crash-simulation design first developed in 1963, with its Kittanning operation now engineering and manufacturing reverse-accelerator systems for safety testing. Its equipment is used by automotive and aircraft manufacturers worldwide, while the company also keeps older installations in service through hands-on engineering support and certified training.
Founded after Nicole Levine saw the need for safer products in her cleaning and pest-control businesses, Hygea Natural manufactures non-toxic household and pest-control solutions in the USA. The company’s products were originally developed for professional exterminators and are now supplied to hospitals, hotels, the U.S. Army, and households worldwide, with a particular focus on bed-bug and dust-mite prevention. Hygea Natural also pairs its products with practical guidance from the professionals at sister company Bed Bug 911.
Hygear Suspension is a Freeville, New York suspension specialist known for helping powersports riders maintain and rebuild their shocks. It serves owners of off-road and snow vehicles with shop service as well as practical hybrid kits for at-home maintenance.
Started by Chris and Cyndi in a basement in June 2017, Hyggelight makes candles designed to become something else: after the flame is gone, the plantable seed label can grow wildflowers and the ceramic vessel can be reused. The company grew from craft-fair sales to national attention after a 2020 Good Morning America Earth Day feature, and is now a Certified B Corporation focused on reducing everyday waste while making cozy gifts.
Founded by the Cole family in 1939, Hygrade Components makes roll-formed metal components, chiefly for the window and door industry, from four U.S. manufacturing locations. The company has expanded from its Long Island roots into agriculture and other markets while adding stamped and four-slide parts, in-house tooling, and more than 60 roll-forming machines across its network. Its executive team has held majority ownership since 2021.