| Quick facts | Answer |
|---|---|
| Cost range | About $40-$125 for residential and commercial tests; $50-$200 per device |
| Time | Varies by device and access - confirm the timeline in your quote |
| Who's qualified | State-certified backflow prevention tester, licensed by South Carolina |
Why do prices vary so much in Charleston?
Prices depend on the device type and the test type. Local providers list about $40 for a residential irrigation device and $65 for DCVA or RPZ devices. Some providers charge $85 for residential and $125 for commercial tests.
Can extra fees apply to a backflow test?
Yes, limited-access devices may cost more. Devices that need digging, pumping out water, or entry into an underground vault may incur additional fees. Some providers also add a $45 dispatch or scheduling fee unless the test is booked and paid online.
How much does an emergency backflow test cost?
One Charleston-area provider lists a same-day emergency residential backflow test at $225. Standard scheduled tests cost considerably less. Ask about emergency pricing before booking.
What should a licensed tester be able to show you?
South Carolina requires all backflow testing to be done by a state-certified backflow prevention tester. Tester licenses expire every three years. The tester's differential gauge must be accurate to within 2% of full scale or plus or minus 0.3 psi.
What to do next
- Request a quote that lists the device type, test type, and any access or dispatch fees.
- Ask the pro for proof of a current South Carolina backflow tester certification and expiration date.
- Confirm the tester holds valid liability insurance before the visit.
- Book online when possible to avoid the $45 dispatch fee some providers charge.
- Call (843) 286-4721 or email [email protected] for a free quote from a licensed, insured local backflow tester.
CHS Backflow is a free referral service: an independent contractor does the work and may pay us a referral fee. You never pay us anything.
