Plumbing Contractors

Last updated: February 2026

This directory lists 144 plumbing contractors across the United States, from commercial build-outs and tenant improvements to specialized industrial process piping and urgent repair services.

Buyers in this category are typically solving critical operational challenges such as routine system maintenance, emergency leak detection, drain cleaning with advanced hydro-jetting technology, or complex installations that require intricate piping schematics for new construction. The focus is often on reliability, regulatory compliance, and minimizing downtime, especially in commercial and industrial settings where system failures can halt production or jeopardize safety.

Supplier types in the plumbing contractor space vary significantly. You'll find large-scale commercial contractors adept at multi-story construction and intricate PEX or copper installations, specializing in projects like healthcare facilities or large office complexes. On the other end, there are highly specialized industrial plumbers focusing on high-pressure steam lines, chemical process piping, or sterile environments. Mid-sized firms often excel in tenant improvement projects, offering comprehensive services from rough-in to fixture installation.

To engage effectively, buyers should prepare detailed scopes of work, including any existing architectural drawings, required flow rates, specific material preferences (e.g., schedule 40 vs. schedule 80 piping), and critical operational timelines. Suppliers, in turn, expect clarity on permit requirements, access to site logistics, and any unique environmental or safety considerations relevant to the project, such as working in confined spaces or around sensitive equipment.

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Shephard Plumbing LLC

Yakima, WA

Shephard Plumbing LLC is a professional plumbing contractor based in Yakima, WA, offering comprehensive residential and commercial services. Their capabilities include water heater repair and installation, efficient drain cleaning, water filtration system setup, and expert leak detection. They also provide plumbing services for new construction and remodeling projects.

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How to Choose a Company

Verify the contractor's specific licensing, bonding, and insurance for your state and the project's scale. For instance, commercial projects often require higher liability coverage and specific contractor classifications than a simple residential repair.
For specialized applications like healthcare facilities or laboratories, ensure the contractor possesses relevant certifications such as ASME/ASSE 6000 series for Medical Gas systems or ASSE Backflow Prevention Assembly Tester (BPAT) certifications.
Inquire about their experience and equipment for unique challenges, such as trenchless pipe repair methods like pipe bursting or Cured-In-Place Pipe (CIPP) lining, or advanced diagnostic tools like CCTV sewer camera inspection for drain lines.
Always request proof of specific insurance policies, including pollution liability for any drain, sewer, or hazardous material work, which can be critical if a mishap leads to environmental damage or contamination.
Be wary of bids that are significantly lower than others without clear justification in their scope. This can be a red flag for cutting corners on permit fees, using substandard materials (e.g., thinner gauge pipe), or lacking the necessary experience to accurately estimate complex projects.

Frequently Asked Questions

When is a specialized medical gas plumber required versus a general commercial plumbing contractor?

A specialized medical gas plumber is absolutely critical for any installation, repair, or maintenance involving oxygen, nitrous oxide, vacuum, or other medical gas systems in healthcare facilities. These systems are life-critical and fall under stringent regulations (like NFPA 99 and specific state health codes). General commercial plumbers typically lack the ASSE 6000 series certifications and specialized tools required for these complex, high-stakes installations, which include brazing, testing, and verifying system integrity under sterile conditions.

What permits and inspections are typically required for a major commercial plumbing renovation?

For a major commercial plumbing renovation, you will almost certainly need a plumbing permit from your local building department, in addition to any general building permits. This permit ensures the work complies with the adopted plumbing code (e.g., UPC or IPC). Expect multiple inspections: a 'rough-in' inspection before walls are closed, a 'top-out' inspection for above-ceiling work, and a final inspection upon completion. Specific projects might also require specialized permits for fire suppression systems, backflow prevention devices, or grease interceptors.

How does the Uniform Plumbing Code (UPC) or International Plumbing Code (IPC) affect my project, and how do I verify a contractor's adherence?

The UPC or IPC (depending on what your local jurisdiction has adopted) dictates the minimum standards for plumbing design, installation, and materials, ensuring safety, sanitation, and efficiency. It governs everything from pipe sizing and trap installation to ventilation and water pressure. To verify adherence, ask contractors which code they operate under, review their proposed methods and materials against code requirements, and confirm they will secure all necessary permits, as this triggers mandatory inspections by code enforcement officials during and after the project.

What's the importance of backflow prevention device testing, and who is qualified to perform it?

Backflow prevention device testing is crucial for safeguarding public drinking water from contamination. These devices prevent non-potable water from flowing back into the potable supply. Many jurisdictions legally mandate annual testing of these devices, particularly for commercial properties. Only a certified Backflow Prevention Assembly Tester (BPAT), who holds specific certifications (often ASSE 5000 series), is qualified to perform these tests. This ensures the device is functioning correctly and helps maintain the integrity of the water supply system.

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