BackflowNear Test-Due Reminder

Backflow testing in Rockville, MD

39 backflow testing businesses work within 25 miles of Rockville, 3 of them based in town. Every one is on the approved tester list of DC Water.

39 businesses within 25 miles

Backflow testing companies near Rockville

Sky Plumbing

90/100
✓ MD Utility-Approved Tester Verified ★ 4.9 (177 reviews) On DC Water list Backflow Testing

12342 Wilkins Ave, Rockville, MD 20852 · 2 mi from Rockville

Call (240) 207-1212 Details Website

Verified Oct 2026 · Unclaimed listing

Acker & Sons, Inc

90/100
✓ MD Utility-Approved Tester Verified ★ 4.6 (65 reviews) On DC Water list Backflow Testing

10516 Summit Ave, Kensington, MD 20895 · 5 mi from Rockville

Call (301) 897-0700 Details Website

Verified Oct 2026 · Unclaimed listing

James A Wheat & Sons

90/100
✓ MD Utility-Approved Tester Verified ★ 4.8 (1300 reviews) On DC Water list Backflow Testing

7834 Beechcraft Ave, Gaithersburg, MD 20879 · 6 mi from Rockville

Call (301) 670-1944 Details Website

Verified Oct 2026 · Unclaimed listing

Harvey W. Hottel

90/100
✓ MD Utility-Approved Tester Verified ★ 4.1 (48 reviews) On DC Water list Backflow Testing

18900 Woodfield Rd, Gaithersburg, MD 20879 · 6 mi from Rockville

Call (301) 461-0622 Details Website

Verified Oct 2026 · Unclaimed listing

Thomas E Clark Inc

90/100
✓ MD Utility-Approved Tester Verified ★ 4.8 (339 reviews) On DC Water list Backflow Testing

2412 Linden Ln, Silver Spring, MD 20910 · 7 mi from Rockville

Call (301) 608-0550 Details Website

Verified Oct 2026 · Unclaimed listing

Durance Plumbing

90/100
✓ MD Utility-Approved Tester Verified ★ 4.8 (73 reviews) On DC Water list Backflow Testing

7304 Carroll Ave #149, Takoma Park, MD 20912 · 10 mi from Rockville

Call (301) 270-6663 Details Website

Verified Oct 2026 · Unclaimed listing

A&E Plumbing Inc

90/100
✓ VA Utility-Approved Tester Verified ★ 4.3 (6 reviews) On DC Water list Backflow Testing

7069 Gateway Ct, Manassas, VA 20109 · 13 mi from Rockville

Call (703) 420-8260 Details Website

Verified Oct 2026 · Unclaimed listing

WE Bowers

90/100
✓ MD Utility-Approved Tester Verified ★ 4.9 (15 reviews) On DC Water list Backflow Testing

7101 Muirkirk Rd, Beltsville, MD 20705 · 14 mi from Rockville

Call (301) 419-2488 Details Website

Verified Oct 2026 · Unclaimed listing

R&R Mechanical, LLC

90/100
✓ DC Utility-Approved Tester Verified ★ 3.8 (12 reviews) On DC Water list Backflow Testing

2902 Bladensburg Rd NE, Washington, DC 20018 · 14 mi from Rockville

Call (202) 636-9451 Details Website

Verified Oct 2026 · Unclaimed listing

CRW Mechanical

90/100
✓ MD Utility-Approved Tester Verified ★ 3.9 (7 reviews) On DC Water list Backflow Testing

5807 Ellerbie St, Lanham, MD 20706 · 18 mi from Rockville

Call (301) 918-0056 Details Website

Verified Oct 2026 · Unclaimed listing

Never miss your annual backflow test

Most water utilities require the backflow assembly on an irrigation, fire or commercial line to be tested every year, and a missed test can mean a shutoff notice. Tell us when yours was last tested in Rockville and we'll text you a month before it is due, with certified local testers ready to book.

Free. One text before your test is due. No spam, cancel anytime. Privacy

Backflow testing questions in Rockville

Who can test a backflow preventer in Rockville?

A tester certified as Maryland's rules require, and accepted by your water utility. The companies here are on the approved list of DC Water: companies allowed to file backflow test reports in that system. Check the notice your utility sent.

How many backflow testing companies serve Rockville?

39 companies on the approved list of DC Water work within 25 miles of Rockville, 3 of them based in town.

How often do I need a backflow test?

Most utilities require a test when the assembly is installed and then every year. Your utility's notice gives the due date and how the tester files the report.

Approved list: Backflow Prevention Assembly Service Providers, DC Water.

Keep looking

Find a tester Set reminder