BackflowNear Test-Due Reminder

Approved backflow testers in Annapolis, MD

54 backflow testing businesses work within 25 miles of Annapolis, 4 of them based in town. 9 have testers on Maryland's roster and 45 are on the approved tester list of 4 water utilities.

54 businesses within 25 miles

Backflow testing companies near Annapolis

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 Annapolis? One sponsor per county, clearly labelled. Sponsor this county

Howard Plumbing

90/100
✓ MD Utility-Approved Tester Verified ★ 4.9 (689 reviews) On Anne Arundel County list Backflow Testing

42 Hudson St Ste 212, Annapolis, MD 21401 · under 1 mile from Annapolis

Call (410) 353-6215 Details Website
Verified Oct 2026 · Unclaimed listing

B&C Plumbing

90/100
✓ MD Utility-Approved Tester Verified ★ 4.6 (15 reviews) On Anne Arundel County list Backflow Testing

516 Pine Tree Dr, Severna Park, MD 21146 · 6 mi from Annapolis

Call (410) 647-1106 Details Website
Verified Oct 2026 · Unclaimed listing

1st Choice Plumbing

90/100
✓ MD Utility-Approved Tester Verified ★ 4.9 (147 reviews) On Anne Arundel County list Backflow Testing

4471 Mountain Rd, Pasadena, MD 21122 · 8 mi from Annapolis

Call (443) 790-9571 Details Website
Verified Oct 2026 · Unclaimed listing

Naumann Plumbing

90/100
✓ MD Utility-Approved Tester Verified ★ 4.3 (44 reviews) On Anne Arundel County listOn City of Rockville list Backflow Testing

2144 Priest Bridge Court Ste 1, Crofton, MD 21114 · 9 mi from Annapolis

Call (410) 451-6199 Details Website
Verified Oct 2026 · Unclaimed listing

Russell R. Dwyer, Inc.

90/100
✓ MD Certified Backflow Tester Verified ★ 4.8 (21 reviews) On WSSC Water listOn Anne Arundel County list Backflow Testing

8377 B Jumpers Hole Rd, Millersville, MD 21108 · 9 mi from Annapolis

Call (410) 647-3030 Details Website
Verified Oct 2026 · Unclaimed listing

Anne Arundel Plumbing

90/100
✓ MD Utility-Approved Tester Verified ★ 4.5 (75 reviews) On Anne Arundel County list Backflow Testing

7930 Wooded Glen Ct, Pasadena, MD 21122 · 10 mi from Annapolis

Call (410) 437-0300 Details Website
Verified Oct 2026 · Unclaimed listing

MPB Plumbing Services

80/100
✓ MD Utility-Approved Tester Verified ★ 4.8 (42 reviews) On Anne Arundel County list Backflow Testing

1564 St Margarets Rd, Annapolis, MD 21409 · 5 mi from Annapolis

Call (410) 636-6019 Details
Verified Oct 2026 · Unclaimed listing

Slo-Flo Plumbing

90/100
✓ MD Utility-Approved Tester Verified ★ 5 (256 reviews) On Anne Arundel County list Backflow Testing

792 Jennie Dr, Severn, MD 21144 · 12 mi from Annapolis

Call (443) 734-8609 Details Website
Verified Oct 2026 · Unclaimed listing

Carson Plumbing

90/100
✓ MD Utility-Approved Tester Verified ★ 5 (181 reviews) On Anne Arundel County list Backflow Testing

1420 Washington Ave, Severn, MD 21144 · 12 mi from Annapolis

Call (410) 963-0204 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 · 13 mi from Annapolis

Call (240) 584-4551 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 · 13 mi from Annapolis

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

Mahon Plumbing Inc.

90/100
✓ MD Utility-Approved Tester Verified ★ 4.9 (284 reviews) On City of Rockville list Backflow Testing

6824 Fort Smallwood Rd Ste. A, Baltimore, MD 21226 · 14 mi from Annapolis

Call (410) 766-8566 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 · 17 mi from Annapolis

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

JA Smith & Company

90/100
✓ MD Utility-Approved Tester Verified ★ 4.9 (34 reviews) On Anne Arundel County list Backflow Testing

7080 Kit Kat Rd, Elkridge, MD 21075 · 18 mi from Annapolis

Call (410) 796-7532 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 Annapolis

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

Heil Plumbing

90/100
✓ MD Utility-Approved Tester Verified ★ 4.9 (2709 reviews) On Anne Arundel County listOn City of Rockville list Backflow Testing

8177 Mission Rd, Jessup, MD 20794 · 19 mi from Annapolis

Call (410) 799-7727 Details Website
Verified Oct 2026 · Unclaimed listing

Fireline Corporation

90/100
✓ MD Utility-Approved Tester Verified ★ 3.5 (51 reviews) On Anne Arundel County list Backflow Testing

4506 Hollins Ferry Rd, Baltimore, MD 21227 · 19 mi from Annapolis

Call (410) 247-1422 Details Website
Verified Oct 2026 · Unclaimed listing

WE Bowers

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

7101 Muirkirk Rd, Beltsville, MD 20705 · 20 mi from Annapolis

Call (301) 419-2488 Details Website
Verified Oct 2026 · Unclaimed listing

Price reports

What a backflow test costs in Annapolis

Not enough reports yet for Annapolis 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

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.

Anne Arundel County Department of Public Works (water): backflow test rules

  • Who must test. Approved backflow preventers are required on point of use lines where needed, including residential fire suppression and lawn irrigation systems. Source.
  • How the report is filed. A state certified tester returns the test report to county DPW within 30 days of a passing test, and failed tests within 72 hours. Source.
  • Tester registration. Tests must be done by testers who are both certified and approved by Anne Arundel County. Source.
  • Approved testers. The county posts a voluntary list of licensed, certified plumbing companies that use its online test entry system at aacounty.org. Source.

Everything about Anne Arundel County Department of Public Works (water)'s backflow program

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 Annapolis and we'll text you a month before it is due, with certified local testers ready to book.

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Backflow testing questions in Annapolis

Where are the backflow testing businesses listed for Annapolis based?

54 backflow testing businesses are listed within 25 miles of Annapolis. 4 are based in Annapolis itself, 15 more within 15 miles and 35 further out, up to 25 miles away. Other towns with more than one listing: Columbia (5), Baltimore (4) and Beltsville (4). The closest is Howard Plumbing, under 1 mile from Annapolis.

Which tester lists are the businesses near Annapolis on?

9 have testers on Maryland's roster and 45 are on the approved tester list of 4 water utilities.

Which water utility sets the backflow test rules in Annapolis?

Anne Arundel County Department of Public Works (water). Who must test: Approved backflow preventers are required on point of use lines where needed, including residential fire suppression and lawn irrigation systems.

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

53 of the 54 listed for Annapolis have 3 or more Google reviews. Heil Plumbing has the most reviews, 2,709, with an average of 4.9 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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