BACKFLOW TEST DUE OR PAST DUE?

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Lafayette · Youngsville · All of Acadiana

Backflow Testing & Installation

THE SHORT ANSWER

Backflow is clean water getting pulled backward into your supply, usually when a main breaks or pressure drops, and it can carry irrigation water, chemicals or wastewater with it. Louisiana requires certified annual testing on irrigation systems, fire lines and most commercial properties, and both LUS in Lafayette and the City of Youngsville require every assembly to be tested at least once a year, at the customer’s cost. Hargrave’s tests, repairs, rebuilds and installs the assemblies. We file the paperwork with your water system so the certification is on record, not just in your inbox.

BOOK ONLINE Call 337-344-3920

Certified testers

Paperwork filed for you

4.9 ★★★★★

1,100+ reviews

Annual

Reminder before you are late

CREDENTIALED, NOT JUST CONFIDENT

Awards and certifications you can actually verify.

Every badge here is a third party vouching for us, not a slogan we wrote about ourselves.

Acadiana's Choice 2025 Winner badge from The Acadiana Advocate

Acadiana's Choice 1st Place Winner

1st place in 2024 and 2025, voted by the people who live here.

ASSE Certified Backflow Prevention Assembly Tester

LICENSED LMNGF #9436 · LPM #5401 · INSURED

Certified by ASSE International for backflow prevention assembly testing, certification 68664.

BBB Accredited Business

Accredited by the Better Business Bureau since 2023.

Authorized Independent Provider

Authorized to take plumbing work through The Home Depot Home Services program.

Best of Acadiana, 2017

Voted a Best of Acadiana winner by Times of Acadiana readers in 2017.

Which assembly do you have?

We test, repair and install backflow preventers on irrigation systems, fire suppression lines, commercial kitchens, medical and dental offices, car washes and multi-unit properties across Lafayette, Youngsville and Acadiana, and on the home irrigation systems common in neighborhoods like River Ranch and Sugar Mill Pond.

You need a test

Annual notice from the water system
New irrigation system on the meter
Property changing hands
Health inspection coming up
Certificate has lapsed

Testing takes a short visit, not a day

The assembly is failing

Water dripping from the relief valve
Standing water at the assembly
Pressure loss after the device
Test result came back failed
Visible corrosion or a cracked body

Most failures are a rebuild, not a replacement

You need one installed

New build or addition
Adding irrigation or a fire line
Commercial kitchen fit-out
Boiler or chemical feed added
Cited for not having a device

Sized and permitted to the local requirement

4.9

★★★★★

1,100+ reviews across Acadiana.

Read all reviews

★★★★★
They did a great job and were a pleasure to work with.
Julie Christman
★★★★★
John was AMAZING! So sweet, very knowledgeable. Give him a raise. He's STELLAR! 10 stars. Service side of plumbing is right up his alley.
Madison
★★★★★
The experience was great! Mr. Colin came same day and effectively fixed my issue.
Christie Charles
★★★★★
Jacob did an excellent job putting in a swimming pool drain line! It was a tough job hand digging around an existing natural gas line for approximately 60 feet! Thanks Jacob!!
Richard D. Reed
★★★★★
Zack did a great job! He has done a few services for me and always does a good job and is very personable. Thank you!
Luci Campbell
★★★★★
Colin (and the company as a whole) was great! He was knowledgeable and assured me throughout the repair.
Grant Delay
★★★★★
Very hard working and polite.
Craig Little
★★★★★
Call and scheduling process was very easy. They were able to be on site within 2 hours. Chance was very professional and courteous and provided me with an estimate before and fixed the issue same day.
Tammy Leger
★★★★★
Delighted with the work, very satisfied, absolutely recommended.
Rosie’ Allain
★★★★★
Very satisfied, great service
Lar D
★★★★★
Johnny Johnson was amazing. He was very knowledgeable, professional and polite. I'll call Hargrave's plumbing for future needs and will request Johnny!
Tiffany Gullett
★★★★★
Company is very responsive, sent technician to our home very promptly. Chance and Jerome were both polite and professional. They serviced our needs quickly!
Meagan
★★★★★
Kayden was very courteous & thorough. He explained everything in detail & he made sure all was clean & working perfectly before he left. When we need work done in the future we would like him to come back.
C T
★★★★★
Zach was great at showing and explaining what all was going to be done. Took time to ensure all 3 faults were good and no longer leaking.
Kristina Duhon
★★★★★
Cordial, on-time, efficient, friendly. Great experience.
malcolm huval ii
★★★★★
He helped us so much! Worked hard and got the job done in the heat
Alexis Marks
★★★★★
AJ was excellent, he took time to take care of a difficult clog and a sink leak correctly. Great service and great attitude. Would definitely recommend.
Aaron Dufrane
★★★★★
Jacob was wonderful!
Sherry Romero
★★★★★
The two service men who came out were Kaleb and Kaden. Very professional, clean, courteous, and very personable.
June Ducote
★★★★★
BEST SERVICE EVER!!! Very friendly and knowledgeable and did his job precise didn't let anything get in his way. Top notch service. Zack is the greatest asset to your company.
Renee Morales
★★★★★
Mr. Johnny is a true professional.
Chase H
★★★★★
Chance, very professional and knowledgeable. Worked very hard in the heat and didn't stop till he completed.
Shelly Willett
★★★★★
Chance with Hargrave Plumbing did a great job on our repair. He was extremely professional.
Raylin Massey
★★★★★
I had a list of plumbing jobs for my home. I called Hargraves plumbing and they were at my house the next day.
Mary Cunningham
★★★★★
Excellent Service from Start to Finish!
Matthew Brown
★★★★★
Very professional and hard-working guys! We had two new hot water heaters installed in our very hot attic within 24 hours of requesting a quote. Very reasonable prices and excellent service.
Stacey Mire
★★★★★
Absolutely fantastic experience.
Farrell Ortego
★★★★★
I have nothing but good things to say about my experience with Chance S. and the rest of his team at Hargrave's.
Chris Jackson
★★★★★
Technician Johnny Johnson did an excellent job and left things better than he found them by improving all the lines in and out. Support staff at the shop were excellent to work with!
Alan Broussard
★★★★★
Mr Johnny came to help us with a tub issue. He was professional and kind.
Chris Cormier
★★★★★
A definite 5 star experience! Thank you Hargrave's Plumbing. Our technician Zach was a wonder!
Tess Lamb
★★★★★
I'm so excited and pleased to write this review! My experience with Hargrave's Plumbing was amazing.
Christie Charles
★★★★★
Thank you Hargrave's Plumbing and Kaleb for the excellent job to replace my 20 year old water heater.
Mark Guilbeau
★★★★★
Excellent service! We needed a new water heater in our attic. The cost was fair and the owner gave me a discount for same-day install. Highly recommend and will use them again in the future!
Tamara Vincent
★★★★★
Excellent service! The technicians Luke and Zach were thorough and clearly explained their findings regarding my clogged kitchen sink drain. They provided me with multiple repair options to fix the issue and described each solution, answering all of my questions so that I understood what the repairs entailed and was able to make an informed decision that fit within my budget. Their professionalism and expertise made me feel reassured and comfortable, top notch service and all repairs completed during the same visit. Thank you again Luke, Zach, and Hargrave’s team for taking such good care of me, you’re the best in town!
C N
★★★★★
Such a wonderful plumbing experience! Fast, reliable and magnificent service! Collin and Chance took care of our delima with confidence and ease. Couldn’t be more pleased with their work and respect for our needs! Thanks Hargrave Plumbing!
Stefni Lotief
★★★★★
Zack came to McAlister’s and he did a wonderful job! Highly recommend yall ask for him to do the plumbing no problems at all he definitely deserves a raise!!
Scooby Hebert
★★★★★
Javon was wonderful to work with! He went above and beyond by explaining everything and finding the source of the problems! He provided quotes and advice on moving forward. We will definitely be working with Hargrave’s Plumbing again! Thank you so much!
Tori Thibodeaux
★★★★★
Zack came out and checked everything. Then quoted cost and came back to the plant and did a quick clean job. Excellent service
Ethel Cantu

What a certified test actually covers

What we do on a backflow test

A test is a pass or fail on a device that protects your drinking water, so it is done to a set procedure every time. Here is the whole scope.

Confirm the assembly type, size and serial number on record

Shut down and isolate the device safely, with notice if water service is affected

Gauge test every check valve and the relief valve to the required differential

Rebuild or replace failed checks, springs, seats and rubber goods on the spot when we carry the kit

Retest after any repair, because a repaired device is not certified until it passes

Complete the certification report and file it with your water system

Leave you a copy for your inspector, your insurer or your file

We schedule irrigation and commercial tests before opening hours where a shutdown would interrupt your business.

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Certified testing, filed for you · licensed and insured.

Why Acadiana takes this seriously

Irrigation sits in the yard

Sprinkler heads sit in standing water and fertilizer for half the year here. A pressure drop on the main is all it takes to pull that back toward the house.

Storms drop the main pressure

Hurricane season means main breaks, hydrant use and pressure swings, which is exactly when a failed check valve matters.

Compliance is local

Lafayette, Youngsville, Carencro and the rural water systems each have their own filing and renewal rules. We work with all of them.

How a backflow test goes

You book
Send us the notice or the device location. We confirm the window with you.
We test to procedure
Gauge on the device, every check and the relief valve, recorded as we go.
Repair and retest if it fails
You see the price for the rebuild before we do it, then we retest so the certificate is valid.
We file the certification
Report goes to your water system and a copy comes to you.

24/7 EMERGENCY · EVERY CALL ANSWERED

Water shut off over a failed device? That is still a call we take.

The phone is answered at any hour. If a failed assembly has your building without water or out of compliance, tell us and we will get on it.

Call 337-344-3920 now →

Backflow questions we get every week in Lafayette and Youngsville

How often do I need to test?

Once a year for most assemblies in this area, and your water system will send a notice with the deadline. Irrigation systems, fire lines and commercial properties are the usual list.

What happens if I ignore the notice?

Water systems can fine you or shut the service off until a passing test is on file. It is a short visit to avoid both.

My device failed. Do I need a new one?

Usually not. Most failures are worn rubber inside the checks and a rebuild kit fixes it. We only recommend replacement when the body is cracked, corroded through, or the parts are no longer made.

Do you handle the paperwork?

Yes. We complete the certification report and file it with your water system, then send you a copy for your records.

Who is responsible for backflow repair?

You are, as the property owner. The water system requires the assembly and the annual test, but the device sits on your side of the meter, so testing, repairs and any re-test are the customer’s cost. Youngsville’s ordinance says so directly, and LUS works the same way. We test it, repair or rebuild it if it fails, re-test it, and file the certification with your water system so it is on record.