Commercial Plumbing Experts

Trust the Maryland Plumbing Repair Experts

Now Serving Howard & Montgomery Counties!

Count on our team of commercial plumbers and technicians to handle all your plumbing requirements for your business, whether it’s an urgent issue or regular maintenance.

Our experts are well-versed in resolving various problems, such as leaky faucets, clogged drains, water heaters, and sewer lines.

Regardless of whether you need assistance at one location or a customized program spanning multiple locations, we have the skills and flexibility to accommodate your needs.

sump pump repairs

Our range of plumbing services designed for commercial clients

Our comprehensive commercial plumbing services cover a wide range of areas, including:

  • Installation and repair of sinks and faucets
  • Maintenance and servicing of toilets and urinals
  • Expertise in water heater installation and repair
  • Handling dishwasher and disposer maintenance needs
  • Effective back-flow prevention solutions
  • Skilled sump pump repair and installation services
  • Reliable water main and sewer line repair and replacement
  • Advanced pipe relining techniques for efficient repairs
  • High-pressure water jetting for thorough cleaning of sewer and drain lines
  • Specialized underground leak and line detection methods
  • Professional grease trap and liquid waste pumping and hauling services
  • Thorough back-flow inspection, certification, repairs, and installation services
  • Efficient sewer and drain cleaning solutions
  • Maintenance and repair services for lift stations
  • Implementation of automated drain care systems to ensure optimal performance

Diagnostic Services and Checkups

We excel in diagnosing plumbing issues for commercial properties with minimal disruptions. Our advanced camera inspections pinpoint the problem for efficient repairs, ensuring smooth business operations.

Preventing Clogged Drains

Regular plumbing maintenance is crucial for uninterrupted business operations. We assist in addressing common plumbing issues like clogged drain lines, floor drains, and grease traps, saving time and money.


Don’t take our word for it. Take theirs.


Keith S | Google

We would give more stars if we could. We had an emergency on a Sunday morning and Dave was AMAZING! He answered the phone right away and was able to fix the problem that morning. He was kind and helpful and ended up saving us money! We highly recommend National Water Service. An easy FIVE STARS.

Jane S | Google

Highly recommend this company. Fixed the issues and were reasonably priced.

Brian C | Google

We lost our water on Sunday and could not reach our regular plumber. My initial contact with Dave was met with an eagerness to help try and restore our water ASAP. He guided me through some procedures to attempt a “reset” over the phone (all done without getting $$ upfront). They arrived Monday with the pump and controller but took the time to troubleshoot and diagnose the root cause (rather then just replace the pump and controller). National Water Service will be our first call whenever we have a plumbing need in the future.

Why Use Our Plumbing Services?

At National Water Service, our master plumber handles all plumbing needs. Our experienced crews prioritize customer support and high workmanship standards. We now offer comprehensive plumbing services. Trust us for reliable and affordable solutions that meet your needs. 

40+ Years of Experience

Professional Tools

5-Star Rated

Timely and Affordable

Get Discounts As a NEW Customer

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