Custom engineered foam products and components to meet insulation needs.


Expert in fluid flow, heat transfer, and demand-based control.


Thermal expansion tanks for safe operation of water heating systems.


A leader in combustion products used in heating, cleaning equipment, and for custom applications. 

Bradford White

The only American-strong, American-owned, wholesale-only water heater and boiler manufacturer in the United States.

BURNHAM Commerial Boilers

A leading manufacturer and marketer of high-quality boilers and control systems for commercial and industrial applications.


Creatherm radiant floor panels offer a great solution for slab-on-grade, snow melt, retro-fit heating.


Manufacturer of combustion analyzers and gas detection products. Annual calibration is done at our warehouse in Hermitage, PA.


Flexible, corrugated stainless steel tubing (CSST) for natural gas and propane distribution.

Heritage Plastics

PVC pipe products for DWV applications and electrical conduit.

Holby Valve Company

Focused on simple, durable valve design and high-performance tempering valves.


Hydronic boilers for residential and commercial space heating, radiant floor heating and volume water heating, covering a range of 50,000 to 5,000,000 BTUs.


An industry-leading manufacturer of heavy-duty power tools, accessories and hand tools for professional users.

New Yorker Boilers

Reliable residential hydronic-heating products, offers a complete line of cast iron and steel boilers, as well as an indirect water heater


Distributes an unmatched array of more than 6,000 plumbing products under Oatey, Cherne, Hercules, Dearborn and Harvey brands.

Red-White Valve

Array of valve products for domestic water and hydronic heating systems.

Schedule Engine

Leading provider of intelligent, self-service online scheduling solutions that gives contractors the opportunity to offer a unique online booking experience to their customers.


Industry leading high efficiency Spirovent® coalescing type air elimination products and its extended line of Spirotrap® dirt separators.

Sterling Inc.

The industry's most complete line of finned tube heating elements and enclosures and baseboard radiation.

Super Radiator Coils

Precision-made products backed by nearly a century of industry knowledge and experience.


PVC fittings for DWV and Schedule 40 applications.


The world’s premier PEX-a pipe manufacture for commercial and residential potable and hydronic applications.

U.S. Boiler Company

American-made residential and commercial heating products that have been designed, engineered and produced domestically.

 = Stocked in PSI warehouse