Who Pays for Backflow Testing: Landlord or Tenant?

By default, the property owner is responsible for the backflow preventer and its test, and that's how the utilities we checked treat it. A lease can shift the cost (or the job of booking the test) to the tenant, which is common in commercial leases through CAM charges, but if the lease is silent, most landlords treat it as a normal cost of owning the property. If you're a renter and the letter came to you, forward it to your landlord right away so the deadline isn't missed.

Key takeaways

Utilities hold the property owner responsible. Wilsonville, OR says so directly, and adds that a lease can make the tenant responsible.

Renters who get the letter should forward it to the landlord or property manager (that's Longview, TX's advice) and keep a copy.

In residential rentals, landlords on investor forums mostly describe the test as an owner operating expense.

In commercial leases, the cost is often passed through as CAM (common area maintenance) or billed directly to the tenant if the lease says so.

The cost at stake is usually modest for one test (about $35-$165 reported), but a failed test and a replacement can run into the hundreds. Say who pays for repairs, not just the test.

I rent. Why did I get a backflow test letter?

Utilities often mail the notice to the service address, or to whoever is on the water account, which in many rentals is the tenant. That doesn't make the tenant legally responsible. The City of Wilsonville answers the question "I am a renter. Why did I receive a letter... about the backflow preventer?" by explaining that the property owner is responsible, though a lease may shift that to the tenant (City of Wilsonville). The City of Longview, TX gives renters a simple instruction: forward the letter to your landlord (City of Longview).

What a renter should do the same day:

Take a photo of the notice and note the deadline.
Send it to the landlord or property manager in writing (email or the tenant portal), so there's a record.
Ask who will book the tester and who will give the tester access to the device.
Check your lease for words like "backflow," "irrigation," "utilities," "water," "maintenance" or "compliance."
If the deadline is close and you hear nothing, call the utility, explain you're a tenant and ask how they handle it. Utilities can shut off water for non-compliance (Longview also mentions fines of up to $2,000), and you're the one who would lose water.

If the letter looks odd, check it first with How to tell if a backflow test letter is legit.

Who pays in a residential rental: landlord or tenant?

There's no single national rule. It comes down to the lease and local law. In practice, though, the owner usually pays.

In a BiggerPockets thread from Portland, OR, a tenant was asked by the landlord to sign up for a "$35 annual cost" testing plan with the water district. The tenant's view was that "water as a utility is their responsibility," but the lease didn't mention backflow. Landlords who replied leaned the other way: "It's just a cost of owning a rental," and testing is "more than likely an owner operating expense" (BiggerPockets).

Why that view is common:

The backflow preventer is part of the building's plumbing, owned by the owner.
The utility's compliance record is tied to the property, not the tenant.
Paying for water use isn't the same thing as maintaining a plumbing assembly.

A tenant who agrees in the lease to pay for "utilities" hasn't automatically agreed to pay for backflow testing. If the lease is unclear, the safer assumption for a landlord is that it's an owner expense. If a landlord wants the tenant to pay, it should be written into the lease.

Situation	Who usually pays (in practice)	What to check
Single-family rental, lease silent	Owner	Lease wording; local landlord-tenant law
Single-family rental, lease makes tenant responsible for irrigation or testing	Tenant (as agreed)	Who books the tester and who pays if it fails
Multifamily building	Owner, often folded into operating costs	Whether utility costs are billed back to tenants
Commercial lease (NNN or with CAM)	Often the tenant, through CAM or direct billing	CAM definition, exclusions, repair vs replacement
Commercial tenant with its own service line or device	Often the tenant	The lease's maintenance and compliance clauses
Condo or HOA common irrigation	HOA, through dues	CC&Rs, who owns the device

This table describes common practice reported on forums and in utility FAQs, not a legal rule.

How does it work in commercial leases (CAM)?

Commercial properties often have several assemblies (domestic, fire line and irrigation), and each one is tested and reported separately, which makes the annual bill bigger. In the BiggerPockets thread, landlords pointed out that commercial leases often pass this kind of cost through as CAM (BiggerPockets). CAM, or common area maintenance, is the share of building operating costs that tenants pay on top of base rent.

Points to look for in a commercial lease:

Is backflow testing named, or covered by "compliance with laws" or "maintenance of building systems"?
Testing vs repair vs replacement. Some leases put routine costs in CAM but treat capital replacements as an owner cost. A new RPZ can be a large item. Replacement quotes of $590 to $1,200 were reported by homeowners in 2025, and commercial devices are often larger.
Who controls the booking. If the tenant pays but the landlord picks the tester, the tenant may want a say in price.
Filing fees. Some utilities charge per report: Dallas charges $10 per passed test through SwiftComply (City of Dallas), and Cedar Hill, TX charges $30 (City of Cedar Hill).
Shutdowns. Testing may need a short water shutdown. Agree on notice and timing.

What about HOAs and condos?

HOA cases come down to who owns the device and the irrigation it serves:

Common-area irrigation (entrance landscaping, shared lawns): the device usually belongs to the association, and the test is paid from dues.
Irrigation on an individual lot fed from the owner's own water service: the homeowner usually owns the device, even if the HOA requires the lawn to be watered.
Condo buildings: assemblies on the building's water service are typically common elements.

Your CC&Rs (the HOA's governing documents) and the utility's account records answer this. If the utility's letter went to you but the device serves common areas, send it to the HOA manager. If you're a tenant in a condo, your landlord (the unit owner) is still your first contact.

What should a lease clause about backflow testing say?

A clear clause answers five questions: who books the test, who pays for it, who pays for repairs or replacement after a failure, who handles filing, and what happens if the deadline is missed. The wording below is a generic example for illustration only. It is not legal advice and isn't tailored to any state. Have a local attorney or your property manager review any lease language.

Example clause (illustration only, not legal advice): "Backflow prevention. Landlord shall arrange for any testing of backflow prevention assemblies serving the Premises required by the water utility, using a tester certified and registered with that utility, and shall submit or cause the tester to submit the required report. [Landlord / Tenant] shall pay the cost of routine testing and any utility filing fee. Repair or replacement of an assembly that fails testing shall be paid by [Landlord / Tenant], except where the failure results from Tenant's misuse or damage. Tenant shall forward any notice received from the water utility to Landlord within [5] days and shall allow reasonable access to the assembly for testing and repair."

How to adapt it:

Residential landlords often keep both blanks on "Landlord" and simply require tenants to forward notices and allow access.
Commercial leases often put routine testing in CAM and handle replacement under the capital-repair clause.
If the tenant books the test, require proof of a passing report and a tester on the utility's approved list (see who can test a backflow preventer).

FAQ

Is backflow testing the landlord's responsibility? Usually, yes. Utilities treat the property owner as responsible, and Wilsonville says so directly. A lease can shift it to the tenant, but it has to say so.

My lease says I pay utilities. Do I pay for backflow testing? Not necessarily. Paying for water use is different from maintaining a plumbing assembly. If the lease doesn't mention backflow or irrigation testing, ask your landlord in writing and keep the reply.

Can my landlord make me sign up for an annual testing plan? Only if the lease says you're responsible for the test. In one Portland case the plan cost $35 a year. If you do sign up, make sure you know how to cancel when you move out.

Who pays if the backflow fails the test in a rental? Repairs usually follow the lease's repair clause, and plumbing repairs are typically the owner's job unless the tenant caused the damage. Read My backflow failed the test: repair or replace? for what a fair repair looks like.

Who pays for backflow testing in a commercial lease? Often the tenant, through CAM or direct billing, if the lease allows it. Check whether replacement is treated differently from routine testing.

What happens if nobody books the test? The utility can shut off water and, in some cities, fine the owner (Longview mentions up to $2,000). Tenants should forward the notice in writing so there's a record.

Quote request info before you split the cost

Whoever ends up paying, compare providers on Backflow Compass so the price is fair and the tester is registered with your utility. Our backflow test cost guide shows prices reported around the country. Backflow Compass is an independent directory, not a testing company.

Disclaimer: This article is general information, not legal advice. Landlord-tenant and lease rules vary by state and city, and the example clause is for illustration only. For your situation, consult a licensed attorney, your property manager or your local tenant resource center, and confirm requirements with your water utility.

Sources

Independent general information. Requirements and prices depend on scope, locality, technical standards and current regulations. Verify critical details with qualified professionals and relevant authorities.