The Drain Guys, Gaithersburg, MD: Backflow Testing

Approvals

✓ On the City of Rockville list Phone matches its Google profile

City of Rockville certified backflow prevention testers, as of July 17, 2026. Being on this list means the utility lets the company file backflow test reports in its water system; it is not a state license.

Ask for the certificate number of the tester who will do your test, and check that your own water utility accepts reports from this company.

Call (301) 867-7632 Visit website More testers in Maryland

Price reports

What a backflow test costs in Gaithersburg

Not enough reports yet for Gaithersburg to show a range. Be one of the first: it takes a minute and stays anonymous.

Published prices nationwide

$29.99 to $100 per assembly

$0$25$50$75$100$125

Based on 14 published prices · Read Oct 2026 Prices testing businesses list on their own websites, from our cost guide. Listed prices, not what people paid.

Every published price, with its source: what a backflow test costs.

Failed test? Published repair, rebuild and replacement prices: what a backflow repair or replacement costs.

Where you will find The Drain Guys

These are the city pages close enough for this business to appear on.

Other backflow testers nearby

Business	Services	Distance
Master Plumbing & Mechanical	Backflow Testing	under 1 mi
Maryland Plumbing and Heating	Backflow Testing	under 1 mi
Gaithersburg Plumbing, Inc.	Backflow Testing	under 1 mi
Mallick Plumbing & Heating, Inc	Backflow Testing	under 1 mi
Robert A. Tull, Inc.	Backflow Testing	under 1 mi
Harvey W. Hottel	Backflow Testing	under 1 mi

Questions about The Drain Guys

Is The Drain Guys approved to test backflow assemblies?

The Drain Guys is on the City of Rockville list, as of July 17, 2026. That means the utility lets the company file backflow test reports in its system; it is not a state license. Ask for the tester's certificate number before the test.

What does The Drain Guys do?

Their listing covers backflow testing. Call to confirm the service you need, because offerings change.

What areas does The Drain Guys serve?

They are based in Gaithersburg, Maryland, within driving distance of Gaithersburg, Rockville, Silver Spring, Beltsville, Columbia. Service areas are set by the business, so confirm yours when you call.

How do I reach The Drain Guys?

Call (301) 867-7632. Their website is linked on this page.

Compiled from public records and public business information. Not an endorsement. Check licensing before you hire.

Is this your business?

Claim this listing free: add the utilities you file with, your service area and your residential test price, and get annual test-due requests from property owners.

Claim this listing