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SCDES-Certified Backflow Testing & Repair in the Lowcountry

Fast, reliable annual backflow inspections for residential ($85) and commercial ($125) systems across Goose Creek, Hanahan, Summerville, and surrounding areas. We test, repair, and submit your paperwork directly to your water provider.
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25+ Years Of Lowcountry Backflow Testing & Repair Experience

Hello Lowcountry!

Your One-Stop Backflow Solution

Swell Guy Plumbing Co has over 25 years of backflow testing & repair experience in the Charleston, SC Lowcountry area and we show up when you schedule your annual backflow test with us.

Steven Dyson, owner and SCDES certified backflow tester, is a lifelong Lowcountry resident with over 25 years of backflow experience. Swell Guy Plumbing values the opportunity to help our Lowcountry neighbors keep their backflow prevention assemblies working properly.

Swell Guy Plumbing is a SCDES certified backflow tester and we also perform backflow repairs, replacements and irrigation backflow terminations.
Next time you need a SCDES certified backflow test, give Swell Guy Plumbing a call. My goal is simple: after the job is done, I want you to say, “My plumber is a Swell Guy!”
Swell Guy Plumbing technician performing a backflow preventer test next to a home in Summerville, SC.

Backflow Pricing

Backflow Test — Residential

Residential 3/4"-1"
$85

Backflow Test — Commercial

Commercial 3/4"-1.5"
$125
Backflow tests are scheduled and paid for online — they do not incur a $45 dispatch fee.
Please note: we do not test fire service assemblies or below ground DCVAs.

Why Choose Swell Guy Plumbing For Your Annual Backflow Test?

  • SCDES Certified Backflow Testers & Fully Licensed Plumbers: Some testers will only tell you if your system passed or failed. Because we are SCDES certified backflow testers and fully licensed plumbers, we can handle repairs, or replace the entire unit to keep your water running safely.
  • We Clean and Retest Before Recommending Costly Repairs: If your initial test fails, we don’t just hand you a failing grade and an expensive bill. Debris and dirty internal components are the most common reasons for a failed test. We will attempt to clean the internals and immediately retest to save you money.
  • Fast, Reliable Submissions: Once your assembly passes, we handle the paperwork and submit the results to your water provider by the end of the week. If it truly needs a repair, we’ll provide an upfront, transparent estimate.
  • Lowcountry Born and Raised: We aren’t a massive corporate franchise based out of California. We are local, experienced, and lifelong Lowcountry residents. When you call, we answer. When you text, we reply.
  • Honest Value Over Cheap Shortcuts: We might not be the cheapest tester in town, but we don’t cut corners. We value your time, protect your clean water, and want to be your go-to choice for years to come.

Additional Backflow Testing Information

  • Backflow tests (in our normal service area) do not incur $45 dispatch/scheduling fee.
  • Backflow tests must be scheduled and paid for online.
  • You must provide a copy of the letter you received from your water purveyor.
  • We do not discount backflow tests.
  • We test 3/4″-1″ residential PVB, RP, DCVA and 3/4″-1.5″ commercial PVB, RP, DCVA.
  • We do not test fire service backflow prevention assemblies or DCVAs installed below ground.
Special offer from Swell Guy Plumbing in Charleston, SC: Tankless Water Heater Flush plus Backflow Test for $195, a $75 savings.

Special Lowcountry Offer

Combine & Save $75

Combination backflow test & annual water heater maintenance = $195

Combine your required annual backflow test with your recommended annual water heater maintenance and save $75.

Normal price for both services is $270. Schedule online today and get get both services for $195.

Is Your Plumber A Swell Guy?

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If Not—Make The Switch Today!

25+ Years of Lowcountry Plumbing Experience & Online Pricing

Frequently Asked Questions

No, you don’t need to be home for us to complete your backflow test! However, if your backflow assembly is located inside a fenced area, please ensure the gate is unlocked and any pets are safely kept indoors during our visit.

Nope! If your irrigation system is officially retired, you don’t need to keep the backflow assembly. Swell Guy Plumbing can cap your inlet and outlet pipes safely underground and remove the assembly.

This service typically runs about $350 to cap the lines below ground and send in the papaerwork. If we return to backfill the hole after the Water Provider inspects the work there is a $155 backfill fee (not charged if you backfill the hole).

Just a quick heads-up: We’ll need your water provider account info before we start so we can verify the line is only used for irrigation. (We aren’t able to disconnect assemblies that double as pool fillers!) We’ll also send the information to your water provider so you stop receiving annual testing notices from them.

Yes, we can help! Swell Guy Plumbing offers same-day emergency backflow testing for this exact situation.

Here is how we can get your water back on today:

  1. Call us first to confirm our availability for the day.

  2. Book online: Once we confirm we can fit you in, we will direct you to book and pay for a same day backflow test online to secure your place in our system.

  3. We handle the rest: We will immediately move your appointment to today’s schedule, perform the certified test, and contact your water provider to get your water turned back on before we leave your property.

Our same-day emergency backflow test is $225 during normal business hours.

Repair costs vary based on the size, brand, and type of assembly, as well as the specific internal component that failed.

To determine the exact issue, we perform our standard certified backflow test ($85 residential / $125 commercial). Before recommending any repairs, we always attempt to clean the internal components and retest first—which often solves the problem and saves you money! If parts are required, we’ll provide a clear, upfront estimate before doing any additional work.

Privacy Policy

At Swell Guy Plumbing, we take your privacy seriously. We're people too and we hate getting bombarded with unwanted emails, texts and phone calls. So we won't do that to you!

No Unsolicited Phone Calls

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No Unsolicited Texts

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Emergency Service

843-874-2590
Over 25 Years Of Plumbing Experience In The Lowcountry Area
221 Saint James Ave | STE 6 | Goose Creek, SC 29445
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