Your Source for Pipe, Valves, Fittings and Flanges

since 1973

For over 50 years, JJ Supply Company Inc. has delivered industrial pipe, valve, and fitting solutions with precision and responsiveness.

Founded in 1973 and headquartered in Toledo, Ohio, JJ Supply Company, Inc. has been serving the industrial marketplace for over 50 years. As a family-led wholesale distributor of pipe, valves, and fittings, we support contractors, manufacturers, and facilities across the region with dependable supply and technical expertise.

Contact Our Team

John Kosmider

Mark Kosmider

Three Generations, One Family Business

When John Kosmider founded JJ Supply Company in 1973, he built more than an industrial supply business — he built a family tradition that's now carried into its third generation. His son, Mark Kosmider, took the reins as President and spent the next 20 years growing JJ Supply into the trusted regional distributor it is today. In 2026, Mark stepped back from day-to-day leadership — though he remains part of the business — and passed ownership to his son-in-law, David Horine, who now leads JJ Supply Company as Owner, continuing to serve Toledo and the surrounding region with the same hands-on values the business was founded on.

Built for Reliability. Backed by Expertise.

With 60,000 square feet of warehouse space, a diverse industrial inventory, and our own fleet of delivery trucks, we maintain full control over fulfillment and response time. Our team brings more than 200 years of combined piping knowledge, blending experience with forward-thinking solutions to meet evolving industry demands.

Our in-house machine shop capabilities reflect our commitment to service. From standard material supply to specialized machining and custom requests, we provide carbon, stainless, plastic, and alloy materials tailored to your specifications. Flexibility and responsiveness are central to how we build long-term partnerships.

JJ Supply offers 24-hour emergency service, 365 days a year, with no minimum order requirements or long-term contracts. Our goal remains consistent: deliver the right materials, at the right time, backed by expertise you can trust.

Brands We Carry

Brands We Trust. Products That Perform.

We carry and source products from established manufacturers across the industrial piping and flow control space. From standard materials to specialized components, we align the right brands with your project requirements.