BackflowNear Test-Due Reminder

Certified backflow testers in Johns Island, SC

45 backflow testing businesses work within 25 miles of Johns Island, 4 of them based in town. 38 have testers on South Carolina's roster and 7 are on the approved tester list of Charleston Water System and BJWSA.

45 businesses within 25 miles
11 for-hire testers based in Johns Island

Certified backflow testers near Johns Island

Most of these businesses are also listed on Charleston, SC.

What the badges mean
✓ SC 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.
✓ SC 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 Johns Island? One sponsor per county, clearly labelled. Sponsor this county

Cruz Lawn And Tree

90/100
✓ SC Certified Backflow Tester Verified #110344928 ★ 4.8 (39 reviews) Backflow Testing

2468 Cape Rd, Johns Island, SC 29455 · 2 mi from Johns Island

Call (843) 834-4044 Details Website
Verified Oct 2026 · Unclaimed listing

Beverly Plumbing

90/100
✓ SC Certified Backflow Tester Verified ★ 4.4 (37 reviews) On Charleston Water System list Backflow Testing

3026 State Rd S-10-1156, Johns Island, SC 29455 · 2 mi from Johns Island

Call (843) 559-5732 Details Website
Verified Oct 2026 · Unclaimed listing

Blitch Plumbing

90/100
✓ SC Certified Backflow Tester Verified ★ 4.3 (167 reviews) 9 certified testersOn Charleston Water System list Backflow Testing

407 Fleming Rd, Charleston, SC 29412 · 6 mi from Johns Island

Call (843) 795-9674 Details Website
Verified Oct 2026 · Unclaimed listing

Precision Fire Systems

90/100
✓ SC Utility-Approved Tester Verified ★ 5 (3 reviews) On Charleston Water System list Backflow Testing

1939 Belgrade Ave Unit 8, Charleston, SC 29407 · 7 mi from Johns Island

Call (843) 767-0117 Details Website
Verified Oct 2026 · Unclaimed listing

Ables Landscapes

90/100
✓ SC Certified Backflow Tester Verified ★ 3.9 (43 reviews) 3 certified testersOn Charleston Water System list Backflow Testing

4527 State Hwy 162, Hollywood, SC 29449 · 8 mi from Johns Island

Call (843) 571-4973 Details Website
Verified Oct 2026 · Unclaimed listing

Plum Easy

90/100
✓ SC Certified Backflow Tester Verified ★ 5 (146 reviews) On Charleston Water System list Backflow Testing

1212 Wappoo Rd, Charleston, SC 29407 · 8 mi from Johns Island

Call (843) 270-3983 Details Website
Verified Oct 2026 · Unclaimed listing

Ashley Plumbing & HVAC

90/100
✓ SC Utility-Approved Tester Verified ★ 5 (7 reviews) On Charleston Water System list Backflow Testing

195 Rutledge Ave, Charleston, SC 29403 · 10 mi from Johns Island

Call (843) 723-2814 Details Website
Verified Oct 2026 · Unclaimed listing

Rooter Man Plumbing

90/100
✓ SC Utility-Approved Tester Verified ★ 5 (601 reviews) On Charleston Water System list Backflow Testing

2013 Bees Ferry Rd, Charleston, SC 29414 · 10 mi from Johns Island

Call (843) 766-3311 Details Website
Verified Oct 2026 · Unclaimed listing

Davis Plumbing

80/100
✓ SC Certified Backflow Tester Verified #110961229 ★ 4.6 (5 reviews) Backflow Testing

3245 Sandhill Rd, Johns Island, SC 29455 · 2 mi from Johns Island

Call (843) 478-1423 Details
Verified Oct 2026 · Unclaimed listing

Bishop and Sons

80/100
✓ SC Certified Backflow Tester Verified ★ 3.7 (6 reviews) On Charleston Water System list Backflow Testing

1723 Signal Point Rd B-2, Charleston, SC 29412 · 6 mi from Johns Island

Call (843) 795-6990 Details
Verified Oct 2026 · Unclaimed listing

Pye Barker Fire & Safety Llc

100/100
✓ SC Certified Backflow Tester Verified #110999227 ★ 4.3 (47 reviews) 9 certified testersOn BJWSA listOn Charleston Water System list Backflow Testing

3898 Leeds Ave, North Charleston, SC 29405 · 11 mi from Johns Island

Call (843) 767-3080 Details Website
Verified Oct 2026 · Unclaimed listing

Eagle Fire Inc

100/100
✓ SC Certified Backflow Tester Verified #110804026 ★ 4.2 (5 reviews) 9 certified testers Backflow Testing

3125 Ashley Phosphate Rd, North Charleston, SC 29418 · 16 mi from Johns Island

Call (843) 291-7862 Details Website
Verified Oct 2026 · Unclaimed listing

Yellowstone Landscape

90/100
✓ SC Certified Backflow Tester Verified ★ 3.5 (51 reviews) 2 certified testersOn Charleston Water System list Backflow Testing

2819 Industrial Ave Bldg 200, North Charleston, SC 29405 · 11 mi from Johns Island

Call (843) 225-2380 Details Website
Verified Oct 2026 · Unclaimed listing

Cullum Mechanical

90/100
✓ SC Certified Backflow Tester Verified ★ 4.1 (53 reviews) On Charleston Water System list Backflow Testing

3325 Pacific St, North Charleston, SC 29418 · 12 mi from Johns Island

Call (843) 554-6645 Details Website
Verified Oct 2026 · Unclaimed listing

Blue Collars

90/100
✓ SC Certified Backflow Tester Verified ★ 5 (231 reviews) 6 certified testersOn Charleston Water System list Backflow Testing

2157 Rich St, Charleston, SC 29405 · 13 mi from Johns Island

Call (843) 375-6680 Details Website
Verified Oct 2026 · Unclaimed listing

Hiller Companies

90/100
✓ SC Certified Backflow Tester Verified #110999527 ★ 2.8 (15 reviews) 2 certified testers Backflow Testing

2031 Ave B Building 44, North Charleston, SC 29405 · 13 mi from Johns Island

Call (843) 767-6500 Details Website
Verified Oct 2026 · Unclaimed listing

Top Choice Plumbing

90/100
✓ SC Certified Backflow Tester Verified ★ 4.9 (226 reviews) 2 certified testersOn Charleston Water System list Backflow Testing

1928 E Montague Ave Ste 102, North Charleston, SC 29405 · 13 mi from Johns Island

Call (843) 718-1838 Details Website
Verified Oct 2026 · Unclaimed listing

Nextgen Technologies

90/100
✓ SC Certified Backflow Tester Verified ★ 4.2 (21 reviews) 2 certified testersOn Charleston Water System list Backflow Testing

2456 Remount Rd #310, North Charleston, SC 29406 · 14 mi from Johns Island

Call (843) 871-8531 Details Website
Verified Oct 2026 · Unclaimed listing

Plumbx

90/100
✓ SC Certified Backflow Tester Verified ★ 5 (63 reviews) 2 certified testersOn Charleston Water System list Backflow Testing

2231 Technical Pkwy Unit E, North Charleston, Charleston, SC 29406 · 15 mi from Johns Island

Call (843) 405-8800 Details Website
Verified Oct 2026 · Unclaimed listing

Grandscapes

90/100
✓ SC Certified Backflow Tester Verified ★ 4.9 (79 reviews) On Charleston Water System list Backflow Testing

1779 State Rd S-10-1931, Mt Pleasant, SC 29464 · 16 mi from Johns Island

Call (843) 814-0808 Details Website
Verified Oct 2026 · Unclaimed listing

Unifour Fire & Safety

90/100
✓ SC Certified Backflow Tester Verified #110317727 ★ 3.2 (11 reviews) Backflow Testing

Wambaw Creek, 2089 Road Unit 1, Charleston, SC 29492 · 17 mi from Johns Island

Call (843) 216-1234 Details Website
Verified Oct 2026 · Unclaimed listing

Price reports

What a backflow test costs in Johns Island

Not enough reports yet for Johns Island 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.

Independent certified testers based in Johns Island

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

TownTesterCertificateExpiresPhone
Johns Island John B Stefanick 110351729 Mar 2029 (410) 530-9365
Larry F Swails 110902729 Jun 2029 (843) 768-0061

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 Johns Island 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 Johns Island

Where are the backflow testing businesses listed for Johns Island based?

45 backflow testing businesses are listed within 25 miles of Johns Island. 4 are based in Johns Island itself, 19 more within 15 miles and 22 further out, up to 25 miles away. Other towns with more than one listing: North Charleston (13), Charleston (11) and Mt Pleasant (6). The closest is Cruz Lawn And Tree, 2 miles from Johns Island.

Which tester lists are the businesses near Johns Island on?

38 have testers on South Carolina's roster and 7 are on the approved tester list of Charleston Water System and BJWSA. The South Carolina Department of Environmental Services roster was read July 9, 2026. It lists 11 for-hire testers based in Johns Island itself. 2 certified testers appear on the roster in Johns Island without a company; they are in the table on this page.

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

41 of the 45 listed for Johns Island have 3 or more Google reviews. Lim-Ric Plbg, Elec, Heating, & Air has the most reviews, 7,175, with an average of 4.9 stars, as Google showed them at our last check.

Roster: South Carolina Department of Environmental Services, read July 9, 2026.

Approved list: Charleston Water System approved backflow prevention assembly testers, Charleston Water System.

Approved list: BJWSA approved backflow testing companies, Beaufort-Jasper Water and Sewer Authority.

Approved list: City of Florence certified backflow testers, City of Florence Utilities.

Approved list: Approved Backflow Test Company List, Charlotte Water.

Keep looking

Find a tester Set reminder