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Backflow testing in Wentzville, MO

61 backflow testing businesses work within 25 miles of Wentzville, 7 of them based in town. Every one has testers on Missouri's certified backflow tester roster.

61 businesses within 25 miles
31 for-hire testers based in Wentzville

Certified backflow testers near Wentzville

Best Lawn Care

100/100
✓ MO Certified Backflow Tester Verified #34-11683 ★ 4.9 (979 reviews) 3 certified testers Backflow Testing

209 Josephville Rd, Wentzville, MO 63385 · 3 mi from Wentzville

Call (636) 200-3000 Details Website

Verified Oct 2026 · Unclaimed listing

Pro Outdoor

100/100
✓ MO Certified Backflow Tester Verified #34-12921 ★ 4.7 (756 reviews) 18 certified testers Backflow Testing

304 TCW Ct, Lake St Louis, MO 63367 · 6 mi from Wentzville

Call (636) 695-7800 Details Website

Verified Oct 2026 · Unclaimed listing

Lawn Authority

100/100
✓ MO Certified Backflow Tester Verified #34-10719 ★ 4.8 (104 reviews) 2 certified testers Backflow Testing

2709 Hopewell Rd, Wentzville, MO 63385 · 6 mi from Wentzville

Call (636) 928-5296 Details Website

Verified Oct 2026 · Unclaimed listing

MH Contracting

90/100
✓ MO Certified Backflow Tester Verified #32-8101 ★ 4.6 (25 reviews) Backflow Testing

2256 Autumn Trace Pkwy, Wentzville, MO 63385 · 2 mi from Wentzville

Call (314) 960-3008 Details Website

Verified Oct 2026 · Unclaimed listing

Automatic Rain

90/100
✓ MO Certified Backflow Tester Verified #34-12533 ★ 4.3 (23 reviews) 2 certified testers Backflow Testing

1491 E Pearce Blvd, Wentzville, MO 63385 · 2 mi from Wentzville

Call (314) 387-0069 Details Website

Verified Oct 2026 · Unclaimed listing

Pipe Guys

90/100
✓ MO Certified Backflow Tester Verified #32-13204 ★ 5 (20 reviews) Backflow Testing

1072 Wies Industrial Dr, Lake St Louis, MO 63367 · 6 mi from Wentzville

Call (314) 930-6009 Details Website

Verified Oct 2026 · Unclaimed listing

Superior Service

90/100
✓ MO Certified Backflow Tester Verified #36-12691 ★ 4.9 (2605 reviews) Backflow Testing

101 Stag Industrial Blvd, Lake St Louis, MO 63367 · 6 mi from Wentzville

Call (314) 209-7500 Details Website

Verified Oct 2026 · Unclaimed listing

Green Elements

90/100
✓ MO Certified Backflow Tester Verified #34-12918 ★ 4.8 (87 reviews) Backflow Testing

5198 Mette Rd, Moscow Mills, MO 63362 · 6 mi from Wentzville

Call (314) 764-5296 Details Website

Verified Oct 2026 · Unclaimed listing

Roden Landscaping

90/100
✓ MO Certified Backflow Tester Verified #34-8418 ★ 4.6 (7 reviews) 2 certified testers Backflow Testing

7800 State Rte N, O'Fallon, MO 63368 · 7 mi from Wentzville

Call (636) 561-3947 Details Website

Verified Oct 2026 · Unclaimed listing

Wayne's Plumbing

80/100
✓ MO Certified Backflow Tester Verified #06-8594 Backflow Testing

75 Saybridge Manor Pkwy, Lake St Louis, MO 63367 · 5 mi from Wentzville

Call (636) 561-1499 Details

Verified Oct 2026 · Unclaimed listing

3 Seasons Irrigation

80/100
✓ MO Certified Backflow Tester Verified #34-12361 ★ 4.6 (16 reviews) Backflow Testing

1419 Diehr Road, Wentzville, MO 63385 · 6 mi from Wentzville

Call (636) 262-8026 Details

Verified Oct 2026 · Unclaimed listing

Henrys Irrigation

80/100
✓ MO Certified Backflow Tester Verified #32-2826 ★ 5 (11 reviews) Backflow Testing

110 River Grv Ct, O'Fallon, MO 63366 · 8 mi from Wentzville

Call (636) 466-5324 Details

Verified Oct 2026 · Unclaimed listing

Metro Lawn Sprinklers

100/100
✓ MO Certified Backflow Tester Verified #34-9140 ★ 4.9 (851 reviews) 11 certified testers Backflow Testing

291 Indacom Dr, St Peters, MO 63376 · 15 mi from Wentzville

Call (636) 936-8243 Details Website

Verified Oct 2026 · Unclaimed listing

Heggemann Inc

100/100
✓ MO Certified Backflow Tester Verified #06-10900 ★ 4.6 (113 reviews) 13 certified testers Backflow Testing

508 Booneslick Rd, Warrenton, MO 63383 · 16 mi from Wentzville

Call (636) 456-8524 Details Website

Verified Oct 2026 · Unclaimed listing

Ozark Mechanical

100/100
✓ MO Certified Backflow Tester Verified #13-14144 ★ 5 (193 reviews) 2 certified testers Backflow Testing

2108 Parkway Dr, St Peters, MO 63376 · 16 mi from Wentzville

Call (636) 317-1234 Details Website

Verified Oct 2026 · Unclaimed listing

Chesterfield Irrigation

100/100
✓ MO Certified Backflow Tester Verified #34-10712 ★ 3.5 (33 reviews) 4 certified testers Backflow Testing

727 Spirit of Saint Louis Blvd, Chesterfield, MO 63005 · 16 mi from Wentzville

Call (636) 537-9795 Details Website

Verified Oct 2026 · Unclaimed listing

GDS Irrigation

100/100
✓ MO Certified Backflow Tester Verified #43-8400 ★ 4.7 (50 reviews) 3 certified testers Backflow Testing

200 Clearview Dr, St Charles, MO 63303 · 17 mi from Wentzville

Call (636) 724-8191 Details Website

Verified Oct 2026 · Unclaimed listing

Builders Bloc

100/100
✓ MO Certified Backflow Tester Verified #06-1893 ★ 3.4 (18 reviews) 2 certified testers Backflow Testing

285 Chesterfield Business Pkwy, Chesterfield, MO 63005 · 18 mi from Wentzville

Call (314) 336-0200 Details Website

Verified Oct 2026 · Unclaimed listing

Chesterfield Service

100/100
✓ MO Certified Backflow Tester Verified #32-9598 ★ 4.9 (4483 reviews) 2 certified testers Backflow Testing

245 Chesterfield Industrial Blvd, Chesterfield, MO 63005 · 18 mi from Wentzville

Call (636) 532-5841 Details Website

Verified Oct 2026 · Unclaimed listing

Wiegmann Associates

100/100
✓ MO Certified Backflow Tester Verified #13-11576 ★ 4 (8 reviews) 6 certified testers Backflow Testing

650 Fountain Lakes Blvd, St Charles, MO 63301 · 18 mi from Wentzville

Call (636) 940-1056 Details Website

Verified Oct 2026 · Unclaimed listing

City of Wentzville Water Division: backflow test rules

  • Who must test. All lawn irrigation systems, fire sprinkler systems and commercial service lines must have a backflow prevention device tested annually by a state of Missouri certified tester. Source.
  • Notices and deadlines. Annual backflow test reports are due by June 1. Source.
  • How the report is filed. Test results can be emailed to Backflow.Test@wentzvillemo.gov, delivered in person, or mailed to Attn: Backflow Reporting; emailed reports get a confirmation receipt. Source.
  • Tester registration. Tests must be by a state of Missouri certified tester; the city points to the Missouri Department of Natural Resources website for the list of certified testers. Source.
  • Fees. Wentzville charges a water backflow filing fee on the customer's water account: $14 if received before June 1, $18 from June 5 through July 1, and $38 after July 5. The receipt date, not the test date, sets the fee. Source.

Everything about City of Wentzville Water Division's backflow program

Independent certified testers based in Wentzville

Testers Missouri's roster lists without a company. Names, certificate numbers and phones as the state publishes them.

TownTesterCertificateExpiresPhone
Wentzville Cale Mandernach 34-14214 Feb 2028 (636) 459-0216

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 Wentzville 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 Wentzville

Who can test a backflow preventer in Wentzville?

A tester certified by Missouri Department of Natural Resources. Your water utility may also keep its own list of testers allowed to file reports. In Wentzville, see City of Wentzville Water Division's rules below.

How many certified backflow testers are based in Wentzville?

31 testers who test for the public list Wentzville as their base on Missouri's roster, and 61 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.

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