Last updated 2026-08-19
TL;DR
Connecticut runs backflow testers through two agencies, not one tester board. The Department of Public Health certifies testers (or accepts a DPH-approved cert) for work on public water systems. The Department of Consumer Protection licenses plumbing if you repair or install. The class takes days. State fees change. Confirm both agencies before you spend.
Do you need a license for backflow tester in Connecticut?
Yes. You need a Connecticut Department of Public Health backflow prevention device tester certification, or a certification from a program DPH has approved, to test assemblies that protect public water systems. You also need a Department of Consumer Protection plumbing and piping license if the job includes installation, repair, or other work licensed under Chapter 393. Testing and repairing are different cards.[1][4]
That split surprises people who type backflow tester connecticut into a search bar and expect one statewide tester license. Connecticut does not issue a single tester-board card the way a reader from another state might assume. Public health testing sits with DPH. Trade work sits with DCP.
Public water systems sit under federal drinking water rules at 40 CFR Part 141 and under the commissioner's authority in CGS section 25-32.[7][3] Those systems have to control cross connections. They hire testers who can show a current DPH-recognized credential and a report the utility will keep.
I would not advertise testing until the DPH path is done. I would not open an assembly to rebuild it until I knew my DCP status. Local water companies can refuse a report from someone who is not on their accepted list even if a state card exists. Call the purveyor before the first visit.
Do not confuse a school completion certificate with state certification. The class is how you learn. DPH is how you become usable on a public system. A weekend printout is not the credential.
If you only test and never repair, you still need to stay inside what the water company and the building official will accept. Some municipalities treat any opening of the assembly as plumbing work. Ask. Guessing is how people get ugly letters.
Who is the backflow tester board in Connecticut?
There is no agency literally named the Backflow Tester Board of Connecticut. The Department of Public Health Drinking Water Section runs cross connection control and tester certification. The Department of Consumer Protection licenses plumbing and piping contractors and journeypersons. Those two shops are the boards that matter.[1][5]
DPH is the one that cares whether you can test a double check or a reduced pressure assembly and fill out a report a community water system can stand behind. DCP is the one that cares whether you are doing licensed plumbing and piping work as defined in CGS section 20-330 and barred without a license by section 20-334.[4]
Section 20-334 says, in part, "No person shall engage in, practice or offer to perform the work of any occupation licensed or registered pursuant to this chapter in this state unless such person has first obtained a license." That sentence is the trade side, not the tester class.
I would bookmark three pages and ignore jobsite rumor. Use the DPH cross connection control page, the DCP plumbing and piping licensing page, and Connecticut eLicense for lookup.[1][5][9] Other states run this through one plumbing window. California's tester board is a different machine. Do not import their forms.
If a school tells you their certificate is the Connecticut license, ask them to show the DPH approval and the application you still file after class. If they cannot, walk.
How much does backflow tester cost in Connecticut?
Plan on paying for an approved multi-day tester course, exam fees the school sets, then whatever DPH charges to issue or renew certification, plus a differential pressure test kit and insurance if you work independently. Current state fees are not something to copy from a blog. Confirm them on the DPH and DCP pages before you write a check.[1][5]
I will not invent a 2026 DPH tester application fee. Those numbers move. Anyone quoting a precise state fee without a dated agency page is guessing.
Course tuition in New England commonly sits in a wide band. Publicly advertised tester classes in the region often land from several hundred dollars to more than a thousand, depending on whether they include the practical exam, a retake, and a loaner kit. Treat that as a market range, not a Connecticut official price. The uncertainty comes from schools setting their own catalogs and changing them by season. Call two approved providers and compare what is included.
A new five-valve differential pressure kit from a major manufacturer usually costs in the low thousands. That is catalog reality, not a state fee. Calibration is recurring. Cheap uncalibrated gauges waste the first utility audit.
If you also want a DCP plumbing license, budget apprenticeship time and DCP license fees separately. That is a different pile of money. Do not blend it into tester cost.
Insurance (general liability, and whatever the water company names in its vendor packet) often dwarfs the class fee in year one. Get the utility's insurance minimums in writing.
Skip framed certification packages that bundle a plaque, a logo, and no DPH path. Waste of money.
Compared with what testers budget in California or Florida's board path, Connecticut's state fee line is usually the small line. The class, the kit, and insurance are the real first-year hit.
How long does backflow tester take in Connecticut?
The tester class itself usually takes a matter of days, commonly a four or five day block for an ASSE 5110 style tester course, not a semester. DPH processing time after you pass is not a published guarantee. A DCP plumbing license, if you need one, takes years of apprenticeship, not days.[10][5]
That is the honest split. People hear how long to become a tester and mix the health credential with the trade license.
I would block one week on the calendar for the course and practical, then add buffer for DPH to put you on whatever list they maintain. I will not promise a two week turnaround. Nobody should. Confirm current processing with the Drinking Water Section.[1]
ASSE 5110 is the professional qualification standard many schools teach to.[10] It is a training and exam standard, not a Connecticut statute. Passing 5110 at a school that is not on DPH's accepted list can leave you with a nice certificate and no utility work.
If your goal includes repairing failed assemblies, look at the P-2 journeyperson path and the hours DCP expects. That clock is measured in years. I would not tell a career-changer that backflow tester equals licensed plumber in one week. It does not.
Out of state credentials can shorten a conversation. They do not automatically become a Connecticut tester card. Ask DPH about reciprocity in writing. Get the answer dated.
What does the Connecticut DPH actually certify?
DPH certifies, or accepts certification for, people who test backflow prevention devices as part of cross connection control for public water systems. The legal hook is the department's drinking water authority and RCSA 19-13-B102, the regulation titled Standards for Quality of Public Drinking Water.[2][3][1]
The EPA Cross-Connection Control Manual states: "Backflow is the undesirable reversal of flow of water or mixtures of water and other liquids, gases, or other substances into the distribution pipes of the potable supply of water from any source or sources."[6] That is the problem DPH expects testers to catch on paper a water system can defend.
DPH does not run your business. It does not dispatch you to restaurants. It sets the public health bar and expects community water systems to keep cross connections under control. You work for building owners and you report to the purveyor.
I would read the current DPH cross connection page end to end before paying a school.[1] Look for the approved course list, the application, and the recertification cycle they state this year. If the PDF is old, email the section and ask if it is still in force.
Surveyor credentials are a different card in many New England programs. That person hunts for cross connections. You test the assembly. Do not buy the wrong class because the brochure used both words.
Do you also need a Connecticut plumbing license to test?
Testing only, for a water company that accepts a DPH tester credential, often does not require a P-1 or P-2 card. Repair, replacement, and new installation of assemblies is plumbing and piping work licensed by DCP under Chapter 393.[4][5] Confirm both the water company and, if the device is inside a building, the local building official.
CGS section 20-330 defines the occupations DCP licenses, including plumbing and piping work. Section 20-334 makes it illegal to offer that work without the license.[4] Connecticut occupational plumbing work is licensed under Chapter 393 of the General Statutes, and section 20-334 bars offering that work without a license.
I have a clear bias here. If I planned to test only, I would get DPH certification and stay out of the bonnet of the assembly. If a test failed, I would write it up and let a licensed plumber repair it. The minute I rebuild a relief valve I have changed jobs.
Some testers hold both cards because customers want one vendor. That is a business choice. It is not a DPH rule.
Lookup existing trade licenses on Connecticut eLicense before you hire a helper.[9]
| Question | DPH tester certification | DCP plumbing license |
|---|---|---|
| Who issues it | Department of Public Health | Department of Consumer Protection |
| What it covers | Testing assemblies for public water systems | Installing, repairing, altering plumbing and piping |
| Typical path | Approved course plus written and practical exam | Apprenticeship plus trade exam |
| Where to confirm | DPH Drinking Water Section | DCP licensing and eLicense |
Other states blur this line differently. Illinois board rules are not Connecticut rules.
What course and exam does Connecticut accept?
Connecticut accepts tester training and exams that DPH has approved. Many New England testers sit a multi-day course built around ASSE 5110 (tester) with a written test and a live practical on RP, DC, and PVB assemblies. Approval is the word that matters, not the brand on the workbook.[10][1]
Call DPH and ask for the current list of approved providers. I would not take a random online-only tester cert and assume a Connecticut water company will take the report.
The practical is where people fail. You need to hook up a differential pressure gauge, walk a reduced pressure assembly through the steps, and record numbers that make sense. Show up having held a real gauge, more than a slide deck.
ASSE 5115 is the backflow prevention assembly repairer qualification. Different standard. Different job. Do not mix the course codes when you register.[10]
If a sales page says national license, hang up. There is no national backflow tester license. There is a federal interest in safe drinking water under 42 U.S.C. 300g-1, and there are state programs.[11]
New England Water Works Association classes show up a lot in this region. That does not make NEWWA the only legal path. The only clean test is whether DPH lists the provider this year.
What paper do water utilities want after you pass?
They want a current tester certification DPH recognizes, a completed test report on the form they specify, gauge calibration records, and often proof of insurance. Some also want your DCP license number if you repaired anything. Confirm the packet with each purveyor.[1]
Paper is the job. The field test is maybe twenty minutes. The report is what keeps the water system inside its sanitary survey and its RCSA 19-13-B102 file.[2][7]
I would ask the utility for a blank report and a sample before I scheduled the first device. Formatting fights after you already tested a hospital are miserable.
Keep copies. If DPH or the water company audits you three years later, my laptop died is not a program.
Federal sanitary survey practice under 40 CFR Part 141 looks at whether the system is controlling cross connections.[7] Your report is their evidence.
CDC counted 42 drinking water associated outbreaks, 1,006 cases of illness, 124 hospitalizations, and 13 deaths in the United States during 2013 and 2014.[8] Not all of those events were backflow events. They are still the reason water systems treat distribution defects as a public health file, not a paperwork hobby.
How do you recertify a Connecticut backflow tester credential?
Recertification is required on the cycle DPH publishes for tester certification, commonly handled through an approved refresher plus exam rather than a full initial week. Confirm the current interval and accepted refreshers with DPH. Do not trust a school catalog over the agency.[1]
I will not invent a mandatory CE hour count for 2026. If someone quotes 16 hours every two years without a DPH citation, ask them for the circular.
Put the expiration on a calendar the day the card arrives. Lapsed testers create void reports. Water companies will not argue with you about a grace period they did not write.
If you also hold a DCP plumbing license, that renews on DCP's schedule through eLicense. Two calendars. Two agencies.[9][5]
A lapsed tester who keeps taking work is not being scrappy. That person is handing a water company a report it may have to throw out. I would rather miss a spring irrigation week than mail a dead card.
What should you buy in year one, and what is a waste?
Buy an approved course seat, a calibrated differential pressure kit once you know you passed, a way to store reports, and the insurance the utilities name. Skip plaques, embroidered inspector jackets, and national registry stickers that Connecticut did not ask for.
I would rent or borrow a gauge for class if the school allows it, then buy a kit after the practical. Buying a pile of brass first is a common way to fund a hobby you quit.
If you want organized ASSE 5110 and 5115 study paper, the $149 one-time Tester Kit from ASSEPath is optional reading. It is not a Connecticut license and it does not move DPH.
Calibration certificates matter more than a shiny case. Utilities will ask. Annual calibration is the usual expectation in the field, but use the interval your water company and the gauge maker state.
A van wrap in month one is a waste. Get three utility vendor packets instead.
Compare impulse spending with how Arizona testers budget the board path or Delaware's smaller market. Same temptation, different board.
Who hires a backflow tester in Connecticut in year one?
Water companies, property managers, fire protection contractors, irrigation companies, and building owners with reduced pressure assemblies on boilers, carbonators, and process lines. Municipal and community systems are the ones who reject bad paper. Private well-only residential jobs are a different legal world and often not the DPH public water tester market.[1][3]
I would start by asking two nearby community water systems how they want testers to apply to their list. That conversation is worth more than an ad.
Hospitals, schools, and food service have dense device counts. They also have purchasing and insurance hurdles. Do not promise same-day turnaround you cannot hit.
Fire lines (DCDA and RPDA assemblies) pay well and attract people who should have held a gauge longer. If you cannot explain a relief valve opening on an RP, you are not ready. Fire protection work can also pull in DCP fire protection licenses. Confirm that craft line before you bid a riser room.
Seasonality is real. Irrigation tests cluster in spring. Indoor devices are year round. Plan cash flow accordingly. Nobody has good public data on tester income in Connecticut. I will not invent an average salary. The closest honest statement is that device counts follow buildings and water-system rules, not a statewide wage survey.
How do you confirm Connecticut backflow tester rules with the board?
Use the DPH Drinking Water Section cross connection page, email or call the section for the approved course list and the current application, use the DCP plumbing licensing page for trade questions, and verify numbers on eLicense.[1][5][9] If a fact is not on those pages or in RCSA 19-13-B102 or Chapter 393, treat it as unofficial.[2][4]
I would keep a dated PDF of every agency page I relied on. Rules get amended. Your memory of a 2019 flyer is not a defense.
Building officials at the town enforce the Connecticut State Building Code, including plumbing backflow provisions adopted through the Department of Administrative Services Office of the State Building Inspector.[12] They are a third stop when the device is inside a building, not a substitute for DPH.
ASSEPath is an independent publisher, not a law firm and not a service company. Nothing here is a filing. Confirm with the agencies.
If two websites disagree, the regulation and the agency letter win. Forums lose.
How does Connecticut compare to other state tester boards?
Connecticut is a two-agency state: DPH for tester certification, DCP for plumbing work. That is closer to other New England public-health models than to states where the plumbing board is the only window. Always read the local statute.[1][5]
Colorado's board writeup and Alabama cost notes will not fill your Connecticut application. Use them only to see how often testers assume the wrong board.
I would rather take one extra day to get a yes in writing from DPH than reuse a Massachusetts or Rhode Island story you heard on a jobsite. Close, and still wrong.
The EPA Cross-Connection Control Manual (EPA 816-R-03-002, 2003) is the shared technical background a lot of states still point to. It is not your application form.[6] Federal law at 42 U.S.C. 300g-1 authorizes national primary drinking water regulations. It does not license you.[11]
If you want the optional study kit after you have the agency links, start at /start. Your first call is still DPH.
Frequently asked questions
Do you need a license for backflow tester in Connecticut?
Yes. DPH tester certification (or a DPH-approved equivalent) is what public water systems check before they accept a test report. A DCP plumbing license is a separate requirement if you install or repair assemblies. Confirm both agencies and the local purveyor before you take paid work.
How much does backflow tester cost in Connecticut?
Budget an approved multi-day course, school exam fees, DPH certification or renewal charges, a calibrated test kit, and insurance. State fees change, so confirm them on DPH and DCP pages. Regional course catalogs often run from several hundred dollars into the low thousands. A new gauge kit is usually a separate four-figure purchase.
How long does backflow tester take in Connecticut?
The tester class is usually a four to five day block, then DPH processing, which is not a guaranteed interval. Confirm current timing with the Drinking Water Section. A DCP plumbing license, if you need one to repair devices, takes years of apprenticeship. Do not mix those clocks.
Is ASSE 5110 enough by itself in Connecticut?
No. ASSE 5110 is a professional qualification standard schools teach and test to. Connecticut still wants a credential DPH recognizes, from an approved path. A 5110 wallet card from an unlisted provider can leave you unable to file reports. Ask DPH whether that specific course is accepted this year.
Does a P-1 contractor license let you test without DPH certification?
Do not assume that. A P-1 shows you can offer licensed plumbing and piping work through DCP. Testing assemblies for a public water system is a DPH cross connection issue. Water companies can reject reports from uncertified testers even if the contractor card is valid. Hold both conversations before you bid.
How often do you recertify a Connecticut backflow tester card?
On the interval DPH publishes for tester certification, usually through an approved refresher and exam rather than another full initial week. I will not invent the 2026 hour count. Read the current DPH circular and put the printed expiration on a calendar the day the card arrives.
Can an out of state tester work in Connecticut?
Only if DPH accepts the credential or you complete the Connecticut path they name. Nearby New England cards start a conversation. They do not automatically authorize reports here. Get reciprocity or application instructions in writing from the Drinking Water Section before you schedule devices.
Who keeps the official list of certified testers?
Start with the Department of Public Health Drinking Water Section. That is the agency that runs cross connection control. Water companies often keep their own accepted-tester lists on top of the state credential. DCP eLicense is where you look up plumbing and piping licenses, not tester cards.
Do you need a test kit calibrated before the first job?
Yes if you want the first utility to keep the report. Bring a current calibration certificate that matches the gauge serial number on the form. Schools may loan a kit for the practical. Buy your own after you pass. Use the calibration interval the purveyor and the gauge maker state.
What report does a Connecticut water company want?
Their form, not a generic template you like. Typical packets also ask for your tester certification, gauge calibration, and insurance. If you repaired the assembly, they may want a DCP license number too. Ask for a blank and a sample before the first appointment.
Can you test only irrigation devices with a shorter class?
Not as a safe assumption. Pressure vacuum breakers still need a proper tester path if the device protects a public water system. A short irrigation sales class is not DPH certification. Confirm with DPH and the water company that serves the property before you take spring work.
Is backflow tester work in Connecticut seasonal?
Irrigation testing stacks in spring. Indoor devices on boilers, carbonators, medical equipment, and process lines run all year. Fire lines follow building schedules, not the weather. Plan cash around the spring bulge, but do not build a business that only exists in April and May.
Where do you look up a Connecticut plumbing license?
Use Connecticut eLicense license lookup, the official DCP verification tool. Search the person or the company before you subcontract repair work. eLicense is not a substitute for DPH tester certification. You may need both numbers on a job that fails and then gets rebuilt.
Does DPH charge a posted tester application fee?
DPH may charge to issue or renew tester certification, but I will not quote a current dollar figure here because those postings change. Check the Drinking Water Section application and fee materials dated for this year. Ignore undated blogs and school flyers that treat last year's number as law.
Sources
- CT DPH Drinking Water Section: Connecticut DPH Drinking Water Section administers the cross connection control program and tester certification information.
- RCSA 19-13-B102 Standards for Quality of Public Drinking Water: Connecticut's public drinking water quality regulation is RCSA 19-13-B102, the code hook for public water system requirements including cross connection control.
- EPA Cross-Connection Control Manual, EPA 816-R-03-002 (2003): The EPA manual defines backflow as the undesirable reversal of flow of water or other substances into the potable distribution pipes.
- 40 CFR Part 141 National Primary Drinking Water Regulations: Federal national primary drinking water regulations apply to public water systems and frame sanitary-survey and distribution protection duties.
- CDC MMWR Surveillance for Waterborne Disease Outbreaks Associated with Drinking Water, United States, 2013-2014: CDC reported 42 drinking water associated outbreaks, 1,006 cases, 124 hospitalizations, and 13 deaths in the United States during 2013 and 2014.
- Connecticut eLicense license lookup: Connecticut eLicense is the official public lookup for DCP occupational licenses including plumbing and piping.
- 42 U.S.C. § 300g-1 National drinking water regulations: Federal law authorizes national primary drinking water regulations under the Safe Drinking Water Act; it does not issue a national tester license.
- Connecticut State Building Code, DAS Office of the State Building Inspector: Local building officials enforce the Connecticut State Building Code, including plumbing provisions adopted through DAS OSBI.