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Backflow testing in Webster Groves, MO

118 backflow testing businesses work within 25 miles of Webster Groves, 2 of them based in town. Every one has testers on Missouri's certified backflow tester roster.

118 businesses within 25 miles
6 for-hire testers based in Webster Groves

Certified backflow testers near Webster Groves

Linek Plumbing

100/100
✓ MO Certified Backflow Tester Verified #06-10548 ★ 4.7 (162 reviews) 14 certified testers Backflow Testing

24 Kirkham Industrial Ct, Webster Groves, MO 63119 · under 1 mile from Webster Groves

Call (314) 962-0956 Details Website

Verified Oct 2026 · Unclaimed listing

Hoffman Brothers

100/100
✓ MO Certified Backflow Tester Verified #32-9608 ★ 4.9 (11981 reviews) 6 certified testers Backflow Testing

1025 Hanley Industrial Ct, Brentwood, MO 63144 · 2 mi from Webster Groves

Call (314) 664-3011 Details Website

Verified Oct 2026 · Unclaimed listing

Peters Eichler

100/100
✓ MO Certified Backflow Tester Verified #13-8326 ★ 4.1 (7 reviews) 6 certified testers Backflow Testing

3115 Sutton Blvd, St. Louis, MO 63143 · 2 mi from Webster Groves

Call (314) 647-4023 Details Website

Verified Oct 2026 · Unclaimed listing

Allen Outdoor Solutions

100/100
✓ MO Certified Backflow Tester Verified #34-11119 ★ 4.1 (162 reviews) 9 certified testers Backflow Testing

7219 Weil Ave, St. Louis, MO 63119 · 2 mi from Webster Groves

Call (314) 647-4800 Details Website

Verified Oct 2026 · Unclaimed listing

Rock Hill Mechanical

100/100
✓ MO Certified Backflow Tester Verified #13-10768 ★ 5 (6 reviews) 7 certified testers Backflow Testing

524 Clark Ave, Kirkwood, MO 63122 · 3 mi from Webster Groves

Call (314) 966-0600 Details Website

Verified Oct 2026 · Unclaimed listing

Maplewood Plumbing

100/100
✓ MO Certified Backflow Tester Verified #32-11793 ★ 4.8 (1815 reviews) 2 certified testers Backflow Testing

2725 Watson Rd, St. Louis, MO 63139 · 3 mi from Webster Groves

Call (314) 645-6350 Details Website

Verified Oct 2026 · Unclaimed listing

Haberberger Mechanical

100/100
✓ MO Certified Backflow Tester Verified #06-8103 ★ 3.4 (29 reviews) 28 certified testers Backflow Testing

9744 Pauline Pl, St. Louis, MO 63123 · 4 mi from Webster Groves

Call (314) 631-3324 Details Website

Verified Oct 2026 · Unclaimed listing

RA Guinner Plumbing

100/100
✓ MO Certified Backflow Tester Verified #06-6814 ★ 4.8 (45 reviews) 3 certified testers Backflow Testing

7244 Gravois Ave, St. Louis, MO 63116 · 4 mi from Webster Groves

Call (314) 752-9850 Details Website

Verified Oct 2026 · Unclaimed listing

GMP Plumbing

100/100
✓ MO Certified Backflow Tester Verified #32-12648 ★ 4.7 (16 reviews) 2 certified testers Backflow Testing

4950 Bischoff Ave, St. Louis, MO 63110 · 5 mi from Webster Groves

Call (636) 464-2221 Details Website

Verified Oct 2026 · Unclaimed listing

L. Grasse & Assoc

100/100
✓ MO Certified Backflow Tester Verified #06-9606 ★ 4.3 (6 reviews) 6 certified testers Backflow Testing

1940 S Kingshighway Blvd, St. Louis, MO 63110 · 5 mi from Webster Groves

Call (314) 771-3244 Details Website

Verified Oct 2026 · Unclaimed listing

Hydro Dynamics Corp.

100/100
✓ MO Certified Backflow Tester Verified #34-10436 ★ 4.5 (152 reviews) 12 certified testers Backflow Testing

9211 Olive Blvd, Olivette, MO 63132 · 5 mi from Webster Groves

Call (314) 997-0064 Details Website

Verified Oct 2026 · Unclaimed listing

Murphy Co

100/100
✓ MO Certified Backflow Tester Verified #13-13424 ★ 4 (48 reviews) 66 certified testers Backflow Testing

1233 N Price Rd, St. Louis, MO 63132 · 6 mi from Webster Groves

Call (314) 997-6600 Details Website

Verified Oct 2026 · Unclaimed listing

Lemay Plumbing, Inc.

100/100
✓ MO Certified Backflow Tester Verified #06-3403 ★ 4.3 (47 reviews) 2 certified testers Backflow Testing

945 Lemay Ferry Rd, St. Louis, MO 63125 · 6 mi from Webster Groves

Call (314) 544-1066 Details Website

Verified Oct 2026 · Unclaimed listing

Bieg Plumbing

100/100
✓ MO Certified Backflow Tester Verified #06-11682 ★ 4.4 (293 reviews) 10 certified testers Backflow Testing

2015 Lemay Ferry Rd, St. Louis, MO 63125 · 6 mi from Webster Groves

Call (314) 487-4564 Details Website

Verified Oct 2026 · Unclaimed listing

Lawn Systems, Inc.

100/100
✓ MO Certified Backflow Tester Verified #34-10124 ★ 4.8 (255 reviews) 15 certified testers Backflow Testing

2260 Cassens Dr, Fenton, MO 63026 · 6 mi from Webster Groves

Call (636) 349-6640 Details Website

Verified Oct 2026 · Unclaimed listing

Classic Aire Care

100/100
✓ MO Certified Backflow Tester Verified #32-12616 ★ 4.9 (5615 reviews) 2 certified testers Backflow Testing

1276 N Warson Rd, St. Louis, MO 63132 · 6 mi from Webster Groves

Call (314) 352-1111 Details Website

Verified Oct 2026 · Unclaimed listing

Emco Refrigeration

100/100
✓ MO Certified Backflow Tester Verified #13-1876 ★ 5 (3 reviews) 2 certified testers Backflow Testing

10200 Page Industrial Blvd, St. Louis, MO 63132 · 6 mi from Webster Groves

Call (314) 427-7477 Details Website

Verified Oct 2026 · Unclaimed listing

Pro Outdoor

100/100
✓ MO Certified Backflow Tester Verified #34-13872 ★ 4.9 (814 reviews) 7 certified testers Backflow Testing

12852 Maurer Industrial Dr, Sappington, MO 63127 · 7 mi from Webster Groves

Call (636) 692-4441 Details Website

Verified Oct 2026 · Unclaimed listing

The Waldinger Corp

100/100
✓ MO Certified Backflow Tester Verified #13-7292 9 certified testers Backflow Testing

2066 Fenton Logistics Pk Blvd, Fenton, MO 63026 · 7 mi from Webster Groves

Call (314) 371-1000 Details Website

Verified Oct 2026 · Unclaimed listing

Merlo Plumbing

100/100
✓ MO Certified Backflow Tester Verified #06-9970 ★ 3.6 (56 reviews) 20 certified testers Backflow Testing

11041 Gravois Industrial Ct, St. Louis, MO 63128 · 7 mi from Webster Groves

Call (314) 843-1000 Details Website

Verified Oct 2026 · Unclaimed listing

Hoffman Plumbing

100/100
✓ MO Certified Backflow Tester Verified #34-0090 ★ 4.2 (24 reviews) 2 certified testers Backflow Testing

2619 Salena St, St. Louis, MO 63118 · 7 mi from Webster Groves

Call (314) 772-3559 Details Website

Verified Oct 2026 · Unclaimed listing

Lawn Masters Inc

100/100
✓ MO Certified Backflow Tester Verified #34-8475 ★ 4.6 (212 reviews) 2 certified testers Backflow Testing

709 Glover Ave, Valley Park, MO 63088 · 8 mi from Webster Groves

Call (636) 230-0700 Details Website

Verified Oct 2026 · Unclaimed listing

OJ Laughlin

100/100
✓ MO Certified Backflow Tester Verified #06-9600 ★ 4.1 (55 reviews) 13 certified testers Backflow Testing

300 St Louis Ave, Valley Park, MO 63088 · 8 mi from Webster Groves

Call (636) 225-0992 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 Webster Groves 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 Webster Groves

Who can test a backflow preventer in Webster Groves?

A tester certified by Missouri Department of Natural Resources. Your water utility may also keep its own list of testers allowed to file reports. Check the notice your utility sent.

How many certified backflow testers are based in Webster Groves?

6 testers who test for the public list Webster Groves as their base on Missouri's roster, and 118 testing businesses are within 25 miles.

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.

Roster: Missouri Department of Natural Resources, read October 6, 2026.

Approved list: WaterOne approved backflow testers, WaterOne.

Approved list: City of Nixa certified backflow testers, City of Nixa.

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