BackflowNear Test-Due Reminder

Approved backflow testers in Waldorf, MD

32 backflow testing businesses work within 25 miles of Waldorf, 2 of them based in town. 5 have testers on Maryland's roster and 27 are on the approved tester list of 5 water utilities.

32 businesses within 25 miles

Backflow testing companies near Waldorf

What the badges mean
✓ MD Certified Backflow Tester Verified
A state roster lists at least one certified tester at this business, with a current certificate. The state sets the exam and renewal.
✓ MD Utility-Approved Tester Verified On the city list
The company is on a water utility's own approved list (the second badge names the list). That is the utility's approval, not a state license, and it counts for that utility.
3 certified testers
How many certified testers the roster lists at this business.
★ 4.8 (25 reviews)
The Google rating, shown as Google reports it. It does not change the order.

Order is by our quality score, never by payment. How we verify listings.

Are you a backflow testing company near Waldorf? One sponsor per county, clearly labelled. Sponsor this county

Genevie Plumbing, Inc.

90/100
✓ MD Certified Backflow Tester Verified ★ 4.8 (226 reviews) On WSSC Water listOn Anne Arundel County listOn City of Rockville list Backflow Testing

11826 Pika Dr, Waldorf, MD 20602 · under 1 mile from Waldorf

Call (301) 645-1759 Details Website
Verified Oct 2026 · Unclaimed listing

ADJ Sheetmetal Inc

90/100
✓ MD Utility-Approved Tester Verified ★ 3.6 (19 reviews) On DC Water list Backflow Testing

4510 Graphics Dr, White Plains, MD 20695 · 3 mi from Waldorf

Call (301) 283-3000 Details Website
Verified Oct 2026 · Unclaimed listing

H&D Mechanical LLC

90/100
✓ MD Utility-Approved Tester Verified ★ 4.2 (5 reviews) On DC Water list Backflow Testing

7703 Crain Hwy, Upper Marlboro, MD 20772 · 12 mi from Waldorf

Call (443) 949-9842 Details Website
Verified Oct 2026 · Unclaimed listing

Kelly HVAC Inc.

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

the kelly building, 8431 Old Marlboro Pike, Upper Marlboro, MD 20772 · 14 mi from Waldorf

Call (301) 736-6585 Details Website
Verified Oct 2026 · Unclaimed listing

Free Line Plumbing

90/100
✓ MD Utility-Approved Tester Verified ★ 4.9 (170 reviews) On DC Water listOn WSSC Water listOn City of Rockville list Backflow Testing

9244 E Hampton Dr #607, Capitol Heights, MD 20743 · 18 mi from Waldorf

Call (301) 499-0987 Details Website
Verified Oct 2026 · Unclaimed listing

Jay Johnson Plumbing

90/100
✓ MD Utility-Approved Tester Verified ★ 4.9 (369 reviews) On Anne Arundel County listOn City of Rockville list Backflow Testing

7945 Eagle View Dr, Chesapeake Beach, MD 20732 · 19 mi from Waldorf

Call (443) 964-6992 Details Website
Verified Oct 2026 · Unclaimed listing

W. L. Gary Company, Inc

90/100
✓ DC Utility-Approved Tester Verified ★ 3.3 (12 reviews) On DC Water listOn City of Rockville list Backflow Testing

1140 3rd St NE Ste 406, Washington, DC 20002 · 20 mi from Waldorf

Call (202) 723-0676 Details Website
Verified Oct 2026 · Unclaimed listing

Welch & Rushe Inc

90/100
✓ MD Utility-Approved Tester Verified ★ 4.2 (10 reviews) On DC Water listOn WSSC Water listOn City of Rockville list Backflow Testing

391 Prince Georges Blvd, Upper Marlboro, MD 20774 · 20 mi from Waldorf

Call (301) 430-6004 Details Website
Verified Oct 2026 · Unclaimed listing

The Severn Group

90/100
✓ MD Utility-Approved Tester Verified ★ 4.5 (13 reviews) On DC Water list Backflow Testing

375 Prince Georges Blvd Ste.B, Upper Marlboro, MD 20774 · 20 mi from Waldorf

Call (240) 584-4551 Details Website
Verified Oct 2026 · Unclaimed listing

Raine & Son, LLC

90/100
✓ MD Certified Backflow Tester Verified ★ 2.8 (30 reviews) On WSSC Water listOn City of Rockville list Backflow Testing

2925 52nd Ave, Hyattsville, MD 20781 · 21 mi from Waldorf

Call (301) 864-1122 Details Website
Verified Oct 2026 · Unclaimed listing

Woodbridge Plumbing

90/100
✓ VA Utility-Approved Tester Verified ★ 4.6 (90 reviews) On Loudoun Water list Backflow Testing

2705 Code Way, Woodbridge, VA 22192 · 21 mi from Waldorf

Call (703) 494-9666 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 · 21 mi from Waldorf

Call (202) 636-9451 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 · 21 mi from Waldorf

Call (703) 420-8260 Details Website
Verified Oct 2026 · Unclaimed listing

Magnolia Plumbing Inc

90/100
✓ DC Utility-Approved Tester Verified ★ 4.4 (1519 reviews) On DC Water listOn City of Rockville list Backflow Testing

600 Gallatin St NE, Washington, DC 20017 · 23 mi from Waldorf

Call (888) 829-8510 Details Website
Verified Oct 2026 · Unclaimed listing

CRW Mechanical

90/100
✓ MD Utility-Approved Tester Verified ★ 3.9 (7 reviews) On DC Water listOn WSSC Water listOn Anne Arundel County listOn City of Rockville list Backflow Testing

5807 Ellerbie St, Lanham, MD 20706 · 24 mi from Waldorf

Call (301) 918-0056 Details Website
Verified Oct 2026 · Unclaimed listing

Price reports

What a backflow test costs in Waldorf

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Published prices nationwide

$29.99 to $100 per assembly

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.

Had your backflow test done? Share what you paid to see local prices.

Metro guide: Backflow testing in Washington, DC: every utility's rules, filing portals and published prices in one place.

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Backflow testing questions in Waldorf

Where are the backflow testing businesses listed for Waldorf based?

32 backflow testing businesses are listed within 25 miles of Waldorf. 2 are based in Waldorf itself, 6 more within 15 miles and 24 further out, up to 25 miles away. Other towns with more than one listing: Washington (5), Hyattsville (4) and Upper Marlboro (4). The closest is Taylor Electric Company, under 1 mile from Waldorf.

Which tester lists are the businesses near Waldorf on?

5 have testers on Maryland's roster and 27 are on the approved tester list of 5 water utilities.

How many of the backflow testing businesses near Waldorf have Google reviews?

28 of the 32 listed for Waldorf have 3 or more Google reviews. Magnolia Plumbing Inc has the most reviews, 1,519, with an average of 4.4 stars, as Google showed them at our last check.

Approved list: WSSC Water plumbing firms providing cross-connection related services, WSSC Water.

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

Approved list: Anne Arundel County accepted plumbing companies providing backflow related services, Anne Arundel County Department of Public Works.

Approved list: City of Rockville certified backflow prevention testers, City of Rockville Department of Public Works.

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