24/7 emergency dispatch: (425) 361-8886 Scheduling Mon–Fri 8–4 · (206) 549-4992
Advanced BackflowSolutions, LLC Call to schedule(206) 549-4992 Schedule Service

Lawn sprinkler & irrigation

Sprinkler backflow testing, done in minutes

Most homes with a lawn sprinkler system have a backflow assembly that needs a test every year. We test it, winterize it, fix it when it freezes, and file the report with your purveyor.

Book a sprinkler test (206) 549-4992

Why your sprinklers need a backflow assembly

Irrigation water sits in pipes buried in soil, often next to fertilizer, pesticide and pet waste. If pressure in the water main drops, that water can be siphoned backward into your home’s plumbing and the public supply. The backflow assembly where your sprinkler line tees off the main line is what stops it, and your purveyor needs proof every year that it works.

Where to find yours

Above ground, near the house

A pressure vacuum breaker (PVB): brass, shaped like an upside-down U, with a round bonnet on top. It sits at least a foot above your highest sprinkler head.

In a valve box in the yard

A double check valve assembly (DCVA): a long brass body with four small test cocks, usually in a green box near the meter or where the irrigation line starts.

Still not sure? The notice from your purveyor lists the assembly’s type, size and location. Our assembly identification guide has more detail.

Your sprinkler backflow, season by season

Spring

Start-up & test

Open valves slowly, check for freeze damage, and get your annual test done as the system comes back on.

Summer

Test & repair

Peak irrigation season. Failed tests are often debris or worn rubber, and many are fixed on the spot.

Fall

Test & winterize

Drain the assembly and insulate it before the first hard freeze, ideally on the same visit as your test.

Winter

Freeze repairs

Cracked bodies and bonnets after a cold snap. We repair or replace, then retest before it goes back into service.

What we do for irrigation systems

  • Annual testing & report filing
  • Fall winterizing & insulated covers
  • Freeze-damage repair & replacement
  • New assemblies for new systems
  • Relocating buried or hard-to-reach assemblies
  • RP assemblies for fertilizer injectors
  • HOA common-area testing in one visit
  • Reminders before next year’s due date

Fertilizer injector or chemical feed on your irrigation? That makes it a high-hazard connection, and a PVB or double check is no longer enough. It needs a reduced-pressure assembly. We can install one →

Sprinkler backflow FAQs

Do I need to be home for my sprinkler backflow test?

Usually not, as long as we can reach the assembly and the irrigation shut-off valve. Leave the gate unlocked and let us know about dogs, and we’ll send you the results when we’re done.

My system is winterized. Can you still test it?

Yes. We re-pressurize the assembly, test it, and drain it again before we leave. If a deep freeze is forecast, we’ll pick a milder day.

I just bought a house and got a test notice. What now?

Testing responsibility moves to the new owner. Book a test before the due date on the notice. If the assembly can’t be found or has been removed, we’ll document what’s there so your purveyor can update its records.

Does drip irrigation need backflow protection?

Yes. Any irrigation connected to your drinking-water plumbing is a cross-connection, whether it feeds sprinkler heads, drip lines or a garden hose timer.

More services

Everything backflow, under one roof

Testing, repairs, installs and emergencies, all handled by the same local crew, with the paperwork taken care of.

Testing & Certification

Annual tests by state-certified testers, filed with your purveyor.

Backflow Repair

Failed test? We rebuild or replace, retest and file the pass.

Installation

New, replacement and relocated assemblies, permitted and certified.

Maintenance Plans

Every due date tracked for homes, HOAs and portfolios.

24/7 Emergency

Burst assemblies, freeze damage and shut-off deadlines.

Service Area

39 cities from Mount Vernon to Tacoma.

Serving these cities

Call now Schedule