3M Filtration

Variety of water filtration and treatment options for healthy drinking water and efficient water systems.


A manufacturer of heat exchangers and custom designed heat transfer, and heat recovery products.  

AK Industries

AK Industries provides a complete line of Poly and Fiberglas Sump Pits, Lids, Sewage Basins, Covers, And Guide Rail Systems.


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


Custom engineered foam products and components to meet insulation needs.


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.


Manufacturer of commercial plumbing fixtures, washroom accessories and Keltech® tankless electric water heaters for commercial applications.

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.


Toilet repair brand with a complete line of toilet repair parts includes flush valves, flappers, tank levers, dual flush valves, bowl wax, toilet repair kits, ballcocks and connectors.


A leading manufacturer of energy-efficient, residential and commercial mini-split and VRF systems.


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.

Keeney Manufacturing

Manufacturer of domestic tubular brass products, brass and plastic under sink repair parts, quarter turn valves, bath drains, toilet repair parts, and other plumbing industry products.


Hydronic boilers for residential and commercial applications.


Simplify bidding and installation on every heating and cooling Job.

Merit Press Technology

Representing the Press Technology portion of their catalog. Merit offers the industry’s only Visual Leak Before Press Ring® (VLBPR®) solution along with the standard Mechanical Leak Before Press feature to the Mechanical Press Plumbing Industry.


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


Fiberglass tubs, tub walls, laundry tubs, mop basins, shower floors and more.


Sump, sewage, effluent and submersible pumps for domestic water distribution in residential applications.


Steel panels, convectors, decorative, bathroom and electric radiators, underfloor heating systems, thermostatic valves for heating and cooling, balancing valves together with electronic control equipment.

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, Harvey and QuickDrain brands.

Python Line Sets

An alternative to line sets, Python PERT-AL-PERT line sets are light-weight, chemical resistant, UV resistant, and tear and kink resistant. Perfect for both standard split and mini-split systems.


Energy-efficient, variable-speed, domestic booster systems for commercial applications.

Red-White Valve

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

SJE Rhombus

Manufacturer of switches and control panels ideal for residential and commercial pump 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.

Tjernlund Products

Quality products solving exhaust, ventilation and heating/cooling issues.

Thermo Products

Thermo Products line features warm air furnaces, heat pumps, central air conditioning systems, and a full line of related accessories.


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.

Westinghouse Mini-Splits

Westinghouse residential, ductless mini-split systems offer energy-efficient solutions in single- and multi-zone applications.

 = Stocked in PSI warehouse