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Whether you need a repair, preventive maintenance, or replacement, we are your plumbing, heating, and air conditioning service provider in the northern Virginia and surrounding areas. We invite you to give us a call!

ETR Laboratories in an analytic laboratory with a broad range of commercial, industrial and individual clients. We provide analytic services using a wide variety of scientific methods including GC/MS, IC/MS, GIR, NMR and SEM equipment. We can do particle analysis, organic and inorganic chemical analysis and micro analysis on biological and other materials. Private water analysis is our specialty. Award winning. Additional DBA - Environmental Testing & Research Laboratories Inc, ETR Labs, ETR Laboratories.

Family Owned & Operated Since 1979. If You Aren't Sure if We Do It, Call and We'll Be Glad to Answer Your Question!

Licensed master electrician serving all of southern Maryland. No job too small. We accept major credit cards. Senior discounts. Free estimates. Residential and commercial.

M.E. Flow, Inc. has been providing exceptional heating, cooling, and plumbing services to residents of northern Virginia since 1951. We are family-owned and operated, and currently in our third generation. We are a team of professionals who are licensed to ensure compliance with the laws and codes of the state of Virginia. With office locations in Leesburg, Winchester, and Alexandria, there’s always a ME Flow team member nearby to serve you quickly. What’s unique about M.E. Flow is that the entire company adopts the original family tradition of our "customer first" philosophy in order to provide the best service possible. This foundation is what sets us apart from other contractors. We have many long-term customers who continue to choose ME Flow because of our honor and integrity. We get to know our customers on a first-name basis and check in on this community that we love so much. We promise that we will never sell you anything you don't need - serving your best interest is our policy. We will always treat your home like it's our own - with respect. Offering weekend service at weekday rates! Emergency service available 7 days a week!

At National Water Service, we set the standard for home water treatment, purification, as well as a complete line of well pumps, boosters, etc. In dealing with Residential areas, one of the important things a homeowner needs to consider is water quality. It is important to note that whether on City Water or a Well System, water quality can vary quite a bit from neighborhood to neighborhood. National Water Service is happy to do a basic analysis at no charge. And if extensive testing is deemed necessary, we have testing services available. National Water Service has been installing and servicing complex water systems in Restaurants, Hotels, Hospitals, Shopping Centers, and various other sites all over the the DC Metro area for over 45 years. We work with Architects, Builders, and Construction Firms to create custom applications for Water Treatment and Purification. Our installers are all professionally trained in both Water Treatment, Purification and well pump service.

CroppMetcalfe was founded and established in 1979 by Mitchell Cropp, and has remained a family owned business by Mitchell and his sons ever since. CroppMetcalfe's mission has always been to provide the ultimate in total comfort systems for your homes and businesses. Additional phone - (540) 347-3024.

Full Service and installation of Plumbing and Gas Work. Licensed Master Plumber AND Licensed Master Gas Fitter

Additional contact names - Andy Beyerlein & Pamela Beyerlein. Additional DBA - Mid Atlantic Plumbing & Water Treatment Systems. Licensed Master Plumber servicing our customers since 1989. Financing and rental options available.

15 years of experience in the residential service trade. We take pride in providing you with a memorable experience and getting the job done right the first time! Plumbing, well pumps, water treatment, water heaters, water proofing and more!