We make the jobs and the overall business of professional plumbers and HVAC technicians easier, faster, and more productive.

Anytime you call Oswald Supply, you will always speak to a live person. Our team is specially trained to provide you with the most technical and informative experience while we take care of your climate control needs.

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SAME DAY SHIPPING

Most items will ship out of our warehouse the same day if ordered before 2PM.

FULL INVENTORY

Oswald Supply has what you are looking for. In-stock and ready to ship.

TRUST THE EXPERTS

Founded in 1923, family owned & operated through four generations.

As a leading boiler parts supplier, Oswald Supply is dedicated to providing expert solutions for all your boiler needs. Our team manufactures and supplies parts from the most trusted brands in the industry. Whether you need replacement parts for a specific boiler type or are looking for effective components for a new system, our extensive inventory ensures we have what you need. Backed by decades of experience, we are your go-to boiler parts supplier, offering both detailed product information and unmatched customer support. Let us help keep your boiler running smoothly today.

WHAT OUR CUSTOMERS SAY

WE CARRY SOME OF THE MOST TRUSTED BRANDS

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Trash Chute Door Products
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Peerless Repair Parts
20% Off
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Peerless Repair Parts
20% Off
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OSWALD INSIGHTS

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Spiral Wound Gaskets: The Reliable Choice for Boiler Repairs

Spiral Wound Gaskets: The Reliable Choice for Boiler Repairs

Check out our full selection of Spiral-Max spiral wound gaskets to get the best in-stock, high-performance sealing solutions shipped fast, or contact Oswald Supply today to learn more!

The Hidden Costs of Ignoring Boiler Maintenance Until Next Winter

The Hidden Costs of Ignoring Boiler Maintenance Until Next Winter

A failing boiler doesn’t give much warning before breaking down, and ignoring maintenance can lead to costly repairs, inefficient heating, and major safety hazards. Waiting until next year to address maintenance problems can result in expensive emergency fixes, lost heating efficiency, and even complete boiler failure.

5 Signs a Boiler May Need to Be Replaced

5 Signs a Boiler May Need to Be Replaced

A well-functioning boiler is essential for keeping buildings warm, but even the most reliable system will eventually reach the end of its lifespan. While repairs and maintenance can extend its usability, certain red flags indicate that boiler replacement is the better option. Here are five signs that a boiler may be due for an upgrade.