Backflow Testing in Houston, TX

When is backflow testing required in Houston?

Backflow testing is required when the assembly goes in, whenever it is repaired or relocated, and every year after that, according to the Houston Public Works Cross Connection Control Program. The City says all cross connections must have the proper assembly installed and maintained, chosen by the severity of the hazard.

The state rule sits behind this. Under 30 TAC 290.44(h), the Texas Commission on Environmental Quality (TCEQ) requires protection at the meter where a site poses a contamination hazard, or an adequate internal program with annual testing. Assemblies guarding against health hazards must be tested at least annually.

These are the assemblies a tester sees most, and the hazard they usually serve:

Assembly	Typical location	Usual hazard
Reduced pressure (RPZ)	Restaurants, medical, car washes, process lines	High, health hazard
Double check	Multi-tenant domestic lines, some fire lines	Lower, non-health hazard
Pressure vacuum breaker	Lawn irrigation	Back-siphonage

Your water supplier decides what your site needs. Simple hose-bibb vacuum breakers are not field tested. Houston also says a service-line assembly does not replace protection inside the building.

Who may do RPZ testing and sign the report?

RPZ testing, like all assembly testing, belongs to a tester licensed by TCEQ. The rule requires an approved course, an exam and a current license, and it says those testers are qualified to test and repair assemblies on domestic, commercial, industrial and irrigation service.

Houston adds a second gate: the tester must appear on the City's Backflow Tester Company List, updated monthly, and have City approval before starting work. Check both before you schedule anyone, including us:

• Ask for the tester's TCEQ license number and confirm it with TCEQ.
• Find the company on the current City list.
• Ask when the test gauge was last checked for accuracy, since the state rule requires that yearly.

What does a tester check on the assembly?

A tester proves each part of the assembly works under pressure, using a calibrated gauge:

1. Record the make, model, size and serial number.
2. Close the shut-off valves in order, which briefly stops water downstream.
3. Connect the gauge to the test cocks and check that each check valve holds tight.
4. On an RPZ, confirm the relief valve opens when it should.
5. Reopen the valves and confirm service is restored.
6. Sign and date the report.

Tell tenants about the short shut-off. Inside a kitchen or clinic, plan the test for a quiet hour, and have the location of every assembly on the site listed first.

What should a complete test include?

A complete test covers every testable assembly on the site, including any the notice did not name. It starts with an inventory, since one property can hold a domestic assembly, an irrigation device and a fire line assembly under different rules. Each one gets its own readings and its own report.

• An inventory of each assembly and its location
• Gauge readings for each check valve and relief valve
• A signed, dated report for each assembly
• Confirmation that the report reached the water supplier
• A plain note on anything that needs repair

The test does not cover the hazard itself. If equipment has changed, the supplier may ask for a different assembly or a customer service inspection. Repair parts are a separate step after a failed reading, and fire line assemblies stay with an approved fire line contractor.

Where does the annual backflow test report go?

The report goes to your water supplier, and in Houston that means an upload. The City says the testing company enters results in SwiftComply, while the customer keeps results on site and confirms with the tester that the report was submitted.

Keep these in one folder for each address:

• Every signed test report
• The City's notice, if you received one
• Repair invoices for the assembly
• The tester's license number and company name

Questions go to the program at (832) 395-3800 or hpwcrosscon@houstontx.gov.

What happens if the assembly fails: backflow repair and retest

A failed test leaves the location out of compliance until a passing report is submitted, the City says. The usual cause is a worn seal, a tired spring or debris on a check valve, and a repair kit often fixes it without replacing the assembly.

Order of events after a failure:

1. Get the failed report and the reading that failed.
2. Approve a clear, upfront quote for the repair or replacement.
3. Repair the assembly.
4. Retest and file the passing report.

The City warns that noncompliance can bring citations with fines of up to $2,000 per day and possible suspension of water service. Replacing an assembly can also need a plumbing permit: the Houston Permitting Center lists a category for vacuum breakers and backflow preventers, so confirm with that office first. If an assembly is removed or replaced, the plumber, engineer or tester sends the program its Backflow Prevention Assembly Removal Form.

How does cross connection control apply to new or remodeled buildings?

Cross connection control starts before the first test. Under 30 TAC 290.46(j), a customer service inspection is required before continuous water service reaches new construction, after material changes to private plumbing, and when the water supplier suspects a hazard.

Adding a boiler, a soda machine, a chemical feed or an irrigation system can change your hazard level. Ask your water supplier before you add equipment.

What affects the cost of a backflow test, and who pays?

The water customer of record answers to the City, and a lease can pass that cost to a tenant. The price of a test depends on these variables:

• Number: one assembly, or several on one site
• Size and type: a small irrigation breaker, or a large RPZ
• Access: an open enclosure, or a locked mechanical room

A test that fails adds a repair and a second test, so ask how a retest is priced before you book. An RPZ has more to check than a pressure vacuum breaker, and a large assembly in a locked room takes longer than a small one in an open box. Shut-off timing can add cost too, when a kitchen or clinic needs a quiet hour. Several assemblies at one address are usually tested on one trip, so ask for one quote covering the site. The testing company pays the City system's fees, so ask if they are in the price. Any repair is quoted after the failed report is reviewed.

Why PipeElectric for backflow prevention paperwork?

This work rewards clear records and plain answers, and that is what customers notice:

• Customers often bring up how plainly things get explained.
• On-time arrival and fair pricing come up in reviews as well.
• Repairs start only after a clear, upfront quote.
• PipeElectric holds a 5.0 on Google from 18 reviews.

Call from 7 AM. We stop at 8 PM Sunday to Thursday and 6 PM Friday, closed Saturday.

Confirm the credentials of whoever tests your device, whichever company you hire. Backflow testers in Texas are licensed by TCEQ, and the TCEQ license page explains the requirement.

Backflow questions are welcome from Houston and from neighbors such as Stafford, Webster, Deer Park and La Porte, each with its own water supplier. For the rest of your building, see our commercial plumbing services.