BackflowNear Test-Due Reminder

Approved backflow testers in Johnstown, OH

91 backflow testing businesses work within 25 miles of Johnstown, 2 of them based in town. Every one is on the approved tester list of 5 water utilities.

91 businesses within 25 miles

Backflow testing companies near Johnstown

What the badges mean
✓ OH 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 Johnstown? One sponsor per county, clearly labelled. Sponsor this county

Mark Cantrell Plumbing LLC

100/100
✓ OH Utility-Approved Tester Verified #A13004 ★ 4.5 (73 reviews) 3 certified testersOn City of Columbus listOn Del-Co Water listOn City of Newark (Ohio) list Backflow Testing

142 E Pratt St, Johnstown, OH 43031 · under 1 mile from Johnstown

Call (740) 965-1603 Details Website
Verified Oct 2026 · Unclaimed listing

Crawford Mechanical Services

100/100
✓ OH Utility-Approved Tester Verified #A13041 ★ 4.6 (73 reviews) 3 certified testersOn City of Columbus listOn City of Newark (Ohio) list Backflow Testing

9464 Jersey Mill Rd, Pataskala, OH 43062 · 5 mi from Johnstown

Call (614) 478-9424 Details Website
Verified Oct 2026 · Unclaimed listing

Blessed Plumbing

90/100
✓ OH Utility-Approved Tester Verified ★ 4.8 (199 reviews) On City of Newark (Ohio) list Backflow Testing

319 Middleburn St, Johnstown, OH 43031 · under 1 mile from Johnstown

Call (614) 204-5156 Details Website
Verified Oct 2026 · Unclaimed listing

Best Plumbing Ltd

90/100
✓ OH Utility-Approved Tester Verified #A11580 ★ 4.7 (13 reviews) On City of Columbus list Backflow Testing

5791 Zarley St, New Albany, OH 43054 · 8 mi from Johnstown

Call (614) 855-1919 Details Website
Verified Oct 2026 · Unclaimed listing

Eaton Plumbing Inc

90/100
✓ OH Utility-Approved Tester Verified #A10824 ★ 4.7 (175 reviews) On City of Columbus listOn Del-Co Water listOn City of Newark (Ohio) list Backflow Testing

5600 E Walnut St, Westerville, OH 43081 · 9 mi from Johnstown

Call (614) 891-7005 Details Website
Verified Oct 2026 · Unclaimed listing

A Mann Plumbing Ltd

100/100
✓ OH Utility-Approved Tester Verified ★ 4.9 (140 reviews) 2 certified testersOn Del-Co Water list Backflow Testing

3396 Columbus Rd, Centerburg, OH 43011 · 10 mi from Johnstown

Call (614) 882-2904 Details Website
Verified Oct 2026 · Unclaimed listing

D & L Plumbing Inc

100/100
✓ OH Utility-Approved Tester Verified #2007 ★ 4.3 (58 reviews) 4 certified testersOn City of Columbus listOn Del-Co Water listOn City of Newark (Ohio) list Backflow Testing

4736 E Walnut St, Westerville, OH 43081 · 10 mi from Johnstown

Call (614) 882-8281 Details Website
Verified Oct 2026 · Unclaimed listing

Rain One Inc

100/100
✓ OH Utility-Approved Tester Verified #A11423 ★ 4.9 (1184 reviews) 2 certified testersOn City of Columbus listOn Del-Co Water listOn City of Newark (Ohio) list Backflow Testing

6871 Taylor Rd, Blacklick, OH 43004 · 13 mi from Johnstown

Call (614) 759-1196 Details Website
Verified Oct 2026 · Unclaimed listing

Cruikshank Plumbing

100/100
✓ OH Utility-Approved Tester Verified #A12497 ★ 4.6 (75 reviews) 3 certified testersOn City of Columbus listOn Del-Co Water listOn City of Newark (Ohio) list Backflow Testing

10723 Hazelton-Etna Rd SW, Pataskala, OH 43062 · 15 mi from Johnstown

Call (740) 927-5401 Details Website
Verified Oct 2026 · Unclaimed listing

American Mechanical Group Inc

100/100
✓ OH Utility-Approved Tester Verified #A10987 ★ 3.9 (29 reviews) 3 certified testersOn City of Columbus listOn City of Newark (Ohio) list Backflow Testing

5729 Westbourne Ave, Columbus, OH 43213 · 15 mi from Johnstown

Call (614) 575-3720 Details Website
Verified Oct 2026 · Unclaimed listing

Plumbing and Drain Professionals LLC

100/100
✓ OH Utility-Approved Tester Verified #A13645 ★ 4.9 (586 reviews) 2 certified testersOn City of Columbus listOn City of Newark (Ohio) list Backflow Testing

372 Morrison Rd Ste d, Columbus, OH 43213 · 15 mi from Johnstown

Call (614) 400-2723 Details Website
Verified Oct 2026 · Unclaimed listing

EPro Services

100/100
✓ OH Utility-Approved Tester Verified #A12122 ★ 4.6 (41 reviews) 3 certified testersOn City of Columbus listOn City of Newark (Ohio) listOn Zanesville-Muskingum County Health Department list Backflow Testing

1491 Polaris Pkwy #217, Columbus, OH 43240 · 16 mi from Johnstown

Call (614) 212-7739 Details Website
Verified Oct 2026 · Unclaimed listing

Sauer Group Inc

100/100
✓ OH Utility-Approved Tester Verified #A13526 10 certified testersOn City of Columbus list Backflow Testing

1105 Schrock Rd Ste 700, Columbus, OH 43229 · 17 mi from Johnstown

Call (614) 853-2500 Details Website
Verified Oct 2026 · Unclaimed listing

G Mechanical

100/100
✓ OH Utility-Approved Tester Verified #6570 ★ 3.4 (41 reviews) 2 certified testersOn City of Columbus listOn City of Newark (Ohio) list Backflow Testing

6480 Doubletree Ave, Columbus, OH 43229 · 17 mi from Johnstown

Call (614) 844-6750 Details Website
Verified Oct 2026 · Unclaimed listing

Elite Fire Services LLC

100/100
✓ OH Utility-Approved Tester Verified #A10647 ★ 5 (19 reviews) 4 certified testersOn City of Columbus listOn City of Newark (Ohio) listOn Del-Co Water list Backflow Testing

3025 Switzer Rd, Columbus, OH 43219 · 17 mi from Johnstown

Call (614) 586-4255 Details Website
Verified Oct 2026 · Unclaimed listing

Summit Fire & Security llc

100/100
✓ OH Utility-Approved Tester Verified #A12661 ★ 4.9 (150 reviews) 3 certified testersOn City of Columbus listOn Del-Co Water listOn Zanesville-Muskingum County Health Department list Backflow Testing

771 Dearborn Park Ln Ste h, Columbus, OH 43085 · 17 mi from Johnstown

Call (614) 471-9700 Details Website
Verified Oct 2026 · Unclaimed listing

S & S Midwest Fire Protection LLC

100/100
✓ OH Utility-Approved Tester Verified #A13498 ★ 3.3 (12 reviews) 3 certified testersOn City of Columbus listOn Zanesville-Muskingum County Health Department list Backflow Testing

670 Lakeview Plaza Blvd L, Columbus, OH 43085 · 17 mi from Johnstown

Call (614) 396-8631 Details Website
Verified Oct 2026 · Unclaimed listing

Siemens Industry

100/100
✓ OH Utility-Approved Tester Verified #A11962 ★ 3.6 (5 reviews) 2 certified testersOn City of Columbus listOn City of Newark (Ohio) list Backflow Testing

530 Lakeview Plaza Blvd # D, Worthington, OH 43085 · 18 mi from Johnstown

Call (614) 846-9540 Details Website
Verified Oct 2026 · Unclaimed listing

Hard Fire Suppression Systems

100/100
✓ OH Utility-Approved Tester Verified #A13348 ★ 5 (5 reviews) 2 certified testersOn City of Columbus list Backflow Testing

400 E Wilson Bridge Rd A, Worthington, OH 43085 · 18 mi from Johnstown

Call (614) 704-8676 Details Website
Verified Oct 2026 · Unclaimed listing

Atlas Butler Heating & Cooling

100/100
✓ OH Utility-Approved Tester Verified #A11107 ★ 4.7 (8332 reviews) 2 certified testersOn City of Columbus listOn Del-Co Water list Backflow Testing

4849 Evanswood Dr, Columbus, OH 43229 · 18 mi from Johnstown

Call (614) 294-8600 Details Website
Verified Oct 2026 · Unclaimed listing

Speer Mechanical

100/100
✓ OH Utility-Approved Tester Verified #A4907 ★ 3.4 (35 reviews) 12 certified testersOn City of Columbus listOn City of Newark (Ohio) listOn Zanesville-Muskingum County Health Department list Backflow Testing

5255 Sinclair Rd, Columbus, OH 43229 · 18 mi from Johnstown

Call (614) 261-6331 Details Website
Verified Oct 2026 · Unclaimed listing

Genesis Building Systems

100/100
✓ OH Utility-Approved Tester Verified #A10680 ★ 5 (3 reviews) 5 certified testersOn City of Columbus listOn Del-Co Water listOn City of Newark (Ohio) list Backflow Testing

7790 N Central Dr, Lewis Center, OH 43035 · 18 mi from Johnstown

Call (614) 272-6868 Details Website
Verified Oct 2026 · Unclaimed listing

G&M Plumbing

100/100
✓ OH Utility-Approved Tester Verified #A11933 ★ 4.6 (11 reviews) 3 certified testersOn City of Columbus listOn Del-Co Water listOn City of Newark (Ohio) listOn Zanesville-Muskingum County Health Department list Backflow Testing

2077 Joyce Ave, Columbus, OH 43219 · 18 mi from Johnstown

Call (614) 263-1851 Details Website
Verified Oct 2026 · Unclaimed listing

Dalmation Fire (Shambaugh & Son LP)

100/100
✓ OH Utility-Approved Tester Verified #A11276 4 certified testersOn City of Columbus listOn Del-Co Water listOn City of Newark (Ohio) listOn Zanesville-Muskingum County Health Department list Backflow Testing

7719 Graphics Wy. Ste f, Lewis Center, OH 43035 · 18 mi from Johnstown

Call (740) 549-4509 Details Website
Verified Oct 2026 · Unclaimed listing

Plumbing One LLC

100/100
✓ OH Utility-Approved Tester Verified #A1411 ★ 4.9 (312 reviews) 2 certified testersOn City of Columbus listOn Zanesville-Muskingum County Health Department listOn City of Newark (Ohio) list Backflow Testing

7393 Long Rd, Canal Winchester, OH 43110 · 19 mi from Johnstown

Call (614) 402-1791 Details Website
Verified Oct 2026 · Unclaimed listing

Ohio Heating & Refrigeration

100/100
✓ OH Utility-Approved Tester Verified #A11917 ★ 4.3 (167 reviews) 4 certified testersOn City of Columbus listOn City of Newark (Ohio) list Backflow Testing

1624 Clara St, Columbus, OH 43211 · 20 mi from Johnstown

Call (614) 863-6666 Details Website
Verified Oct 2026 · Unclaimed listing

Farber Corporation

100/100
✓ OH Utility-Approved Tester Verified #A3420B ★ 4 (13 reviews) 2 certified testersOn City of Columbus listOn City of Newark (Ohio) list Backflow Testing

800 E 12th Ave, Columbus, OH 43211 · 20 mi from Johnstown

Call (614) 294-1626 Details Website
Verified Oct 2026 · Unclaimed listing

Price reports

What a backflow test costs in Johnstown

Not enough reports yet for Johnstown 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.

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

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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 Johnstown 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 Johnstown

Where are the backflow testing businesses listed for Johnstown based?

91 backflow testing businesses are listed within 25 miles of Johnstown. 2 are based in Johnstown itself, 18 more within 15 miles and 71 further out, up to 25 miles away. Other towns with more than one listing: Columbus (40), Newark (7) and Canal Winchester (5). The closest is Mark Cantrell Plumbing LLC, under 1 mile from Johnstown.

Which tester lists are the businesses near Johnstown on?

Every one is on the approved tester list of 5 water utilities.

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

78 of the 91 listed for Johnstown have 3 or more Google reviews. Atlas Butler Heating & Cooling has the most reviews, 8,332, with an average of 4.7 stars, as Google showed them at our last check.

Approved list: City of Newark, Ohio companies employing State of Ohio certified backflow testers, City of Newark Water Department.

Approved list: City of Columbus approved backflow testers, City of Columbus.

Approved list: Del-Co Water active backflow testers, Del-Co Water Company.

Approved list: Zanesville-Muskingum County Health Department certified backflow testers, Zanesville-Muskingum County Health Department.

Approved list: Northwestern Water and Sewer District certified backflow testers, Northwestern Water and Sewer District.

Approved list: Ottawa County area Ohio Department of Commerce certified backflow testers, Ottawa County Sanitary Engineer.

Approved list: City of Columbus approved backflow testers (irrigation devices), City of Columbus.

Approved list: Trumbull County Combined Health District plumbers certified to test backflow devices, Trumbull County Combined Health District.

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